Space Weather Message Code: SUM10R
Serial Number: 721
Issue Time: 2021 Nov 02 0311 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2021 Nov 02 0236 UTC
Maximum Time: 2021 Nov 02 0236 UTC
End Time: 2021 Nov 02 0237 UTC
Duration: 1 minutes
Peak Flux: 110 sfu
Latest Penticton Noon Flux: 98 sfu
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
Serial Number: 721
Issue Time: 2021 Nov 02 0311 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2021 Nov 02 0236 UTC
Maximum Time: 2021 Nov 02 0236 UTC
End Time: 2021 Nov 02 0237 UTC
Duration: 1 minutes
Peak Flux: 110 sfu
Latest Penticton Noon Flux: 98 sfu
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
Space Weather Message Code: WARK05
Serial Number: 1617
Issue Time: 2021 Nov 02 0521 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Nov 02 0521 UTC
Valid To: 2021 Nov 02 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Serial Number: 1617
Issue Time: 2021 Nov 02 0521 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Nov 02 0521 UTC
Valid To: 2021 Nov 02 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: WARK04
Serial Number: 3955
Issue Time: 2021 Nov 02 0526 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3954
Valid From: 2021 Nov 01 2135 UTC
Now Valid Until: 2021 Nov 02 1800 UTC
Warning Condition: Persistence
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Serial Number: 3955
Issue Time: 2021 Nov 02 0526 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3954
Valid From: 2021 Nov 01 2135 UTC
Now Valid Until: 2021 Nov 02 1800 UTC
Warning Condition: Persistence
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
:Product: Forecast Discussion
:Issued: 2021 Nov 02 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity was at moderate levels due to a long duration M1/1f flare
from Region 2891 (N16W04, Dai/beta). Associated with this flare was a
110 pfu 10 cm radio burst and a halo CME first observed in SOHO/LASCO C2
imagery at 02/0248 UTC. Due to its location near center disk, an
Earth-directed component is expected. Further modelling is necessary as
imagery becomes available.
Region 2887 (S25W73, Hsx/alpha) was responsible for producing a CME at
01/1824 UTC from a long duration C1 flare at 01/1801 UTC off the SW
limb. This was followed by what appeared to be a double CME event off
the W and SW limb at 01/2124 UTC associated with a C4/Sf flare at
01/2133 UTC. Initial modelling of the CMEs from 2887 appear to show an
arrival on 04 Nov. Further analysis is in progress.
The trailing spots of Region 2887 decayed leaving the group a simple
H-type spot. Some motion could be seen along the inversion line in the
central spots of Region 2891. Region 2893 (N16E52, Hsx/alpha) was quiet
and stable.
.Forecast...
Solar activity is expected to be low, with a chance for additional
M-class flare activity (R1-R2, Minor-Moderate Radio Blackouts), over
02-04 Nov.
Energetic Particle
.24 hr Summary...
The greater than 10 MeV proton flux remained elevated above background
levels near 2-3 pfu, but well below the 10 pfu (S1-minor) threshold. The
greater than 2 MeV electron flux was at normal to moderate levels.
.Forecast...
There is a slight chance for the greater than 10 MeV proton flux to
reach the S1 (Minor) solar radiation storm threshold over 02-03 Nov. The
greater than 2 MeV electron flux is expected to be at normal to moderate
levels on 02-04 Nov.
Solar Wind
.24 hr Summary...
Solar wind parameters indicated the connection to a positive polarity CH
HSS from a northern crown extension. Total field increased to a maximum
of 15 nT at 01/1953 UTC followed by an increase in solar wind speed from
approximately 335 km/s to near 600 km/s. The Bz component was between
+15/-12 nT and the phi angle was mostly oriented in a positive sector.
.Forecast...
Solar wind parameters are anticipated to remain enhanced, but gradually
return to background levels by 03 Nov as HSS effects slowly diminish. By
04 Nov, a conglomeration of CMEs from Region 2887 will likely impact
Earth, however timing may be changed based on new inputs from todays
halo CME associated with Region 2891.
Geospace
.24 hr Summary...
The geomagnetic field was quiet to active due to the onset of a positive
polarity CH HSS.
.Forecast...
Quiet to unsettled conditions, with isolated active levels, are expected
on 02 Nov as CH HSS persist. Quiet to unsettled levels are expected on
03 Nov. G1 (Minor) geomagnetic storm conditions are likely on 04 Nov
from combined CME activity. These levels will be re-evaluated as new
information from todays halo CME becomes available.
:Issued: 2021 Nov 02 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity was at moderate levels due to a long duration M1/1f flare
from Region 2891 (N16W04, Dai/beta). Associated with this flare was a
110 pfu 10 cm radio burst and a halo CME first observed in SOHO/LASCO C2
imagery at 02/0248 UTC. Due to its location near center disk, an
Earth-directed component is expected. Further modelling is necessary as
imagery becomes available.
Region 2887 (S25W73, Hsx/alpha) was responsible for producing a CME at
01/1824 UTC from a long duration C1 flare at 01/1801 UTC off the SW
limb. This was followed by what appeared to be a double CME event off
the W and SW limb at 01/2124 UTC associated with a C4/Sf flare at
01/2133 UTC. Initial modelling of the CMEs from 2887 appear to show an
arrival on 04 Nov. Further analysis is in progress.
The trailing spots of Region 2887 decayed leaving the group a simple
H-type spot. Some motion could be seen along the inversion line in the
central spots of Region 2891. Region 2893 (N16E52, Hsx/alpha) was quiet
and stable.
.Forecast...
Solar activity is expected to be low, with a chance for additional
M-class flare activity (R1-R2, Minor-Moderate Radio Blackouts), over
02-04 Nov.
Energetic Particle
.24 hr Summary...
The greater than 10 MeV proton flux remained elevated above background
levels near 2-3 pfu, but well below the 10 pfu (S1-minor) threshold. The
greater than 2 MeV electron flux was at normal to moderate levels.
.Forecast...
There is a slight chance for the greater than 10 MeV proton flux to
reach the S1 (Minor) solar radiation storm threshold over 02-03 Nov. The
greater than 2 MeV electron flux is expected to be at normal to moderate
levels on 02-04 Nov.
Solar Wind
.24 hr Summary...
Solar wind parameters indicated the connection to a positive polarity CH
HSS from a northern crown extension. Total field increased to a maximum
of 15 nT at 01/1953 UTC followed by an increase in solar wind speed from
approximately 335 km/s to near 600 km/s. The Bz component was between
+15/-12 nT and the phi angle was mostly oriented in a positive sector.
.Forecast...
Solar wind parameters are anticipated to remain enhanced, but gradually
return to background levels by 03 Nov as HSS effects slowly diminish. By
04 Nov, a conglomeration of CMEs from Region 2887 will likely impact
Earth, however timing may be changed based on new inputs from todays
halo CME associated with Region 2891.
Geospace
.24 hr Summary...
The geomagnetic field was quiet to active due to the onset of a positive
polarity CH HSS.
.Forecast...
Quiet to unsettled conditions, with isolated active levels, are expected
on 02 Nov as CH HSS persist. Quiet to unsettled levels are expected on
03 Nov. G1 (Minor) geomagnetic storm conditions are likely on 04 Nov
from combined CME activity. These levels will be re-evaluated as new
information from todays halo CME becomes available.
Space Weather Message Code: WATA20
Serial Number: 904
Issue Time: 2021 Nov 02 1902 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Nov 03: G1 (Minor) Nov 04: G1 (Minor) Nov 05: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Serial Number: 904
Issue Time: 2021 Nov 02 1902 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Nov 03: G1 (Minor) Nov 04: G1 (Minor) Nov 05: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
:Product: Forecast Discussion
:Issued: 2021 Nov 03 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity reached moderate levels due to a long duration M1/1f
flare from Region 2891 (N16W13, Dai/beta). Associated with this flare
was an F10 cm radio burst (110 pfu) and a halo CME first observed in
SOHO/LASCO C2 imagery at 02/0248 UTC. Analysis of the CME indicated a
likely Earth-directed component with an estimated arrival time at Earth
of late on 03 Nov to early on 04 Nov.
Region 2887 (S26W78, Hax/alpha) was responsible for a long duration C1
flare at 01/1801 UTC off the SW limb. This flare also had an associated
CME that was first visible in LASCO C2 imagery at 01/1824 UTC. This was
followed by what appeared to be a double CME event off the W and SW limb
at 01/2124 UTC associated with a C4/Sf flare at 01/2133 UTC. Analysis of
the CMEs from 2887 indicated that the plasma associated with these
events is likely to be swept up in the CME from the M1 flare mentioned
earlier.
An additional CME was observed departing the southwest limb at
approximately 02/1200 UTC. Analysis is underway to determine if this CME
has an Earth-directed component as well.
The trailer spots of Region 2891 appeared to show consolidation and weak
shear while most of the intermediate spots decayed. Region 2893 (N16E44,
Hsx/alpha) was quiet and stable.
.Forecast...
Solar activity is expected to be low, with a chance for additional
M-class flare activity (R1-R2, Minor-Moderate Radio Blackouts), over
03-05 Nov.
Energetic Particle
.24 hr Summary...
The greater than 10 MeV proton flux remained elevated above background
levels near 2-3 pfu, but well below the 10 pfu (S1-minor) threshold. The
greater than 2 MeV electron flux was at normal to moderate levels.
.Forecast...
There is a slight chance for the greater than 10 MeV proton flux to
reach the S1 (Minor) solar radiation storm threshold 03-04 Nov. The
greater than 2 MeV electron flux is expected to be at normal to moderate
levels on 03-05 Nov.
Solar Wind
.24 hr Summary...
Solar wind parameters indicated the connection to a positive polarity CH
HSS from a northern crown extension. Total field began the period near
15 nT before gradually decreasing to near 4 nT by the end of the period.
The Bz component fluctuated between +15/-12 nT early, but ended the
period near neutral to near 1 nT. Solar wind speed increased from
approximately 335 km/s early in the period to around 600 km/s by
periods end. The phi angle was mostly oriented in a positive sector
with several brief oscillations into the negative sector.
.Forecast...
Solar wind parameters are anticipated to remain enhanced through most of
03 Nov as CH influence persists. By late on 03 Nov to early on 04 Nov, a
conglomeration of CMEs from Regions 2887 and 2891 will likely impact
Earth, causing additional enhancements to the solar wind environment.
Continuing CME/CH HSS effects are expected to persist through the day on
05 Nov.
Geospace
.24 hr Summary...
The geomagnetic field ranged from quiet to active levels due to the
influence of a positive polarity CH HSS.
.Forecast...
Quiet to unsettled levels are expected for most of the day on 03 Nov
ahead of the 02 Nov CMEs. G1 (Minor) geomagnetic storm conditions are
likely, with a chance for an isolated G2 period, late on 03 Nov to early
on 04 Nov due to combined CME/CH HSS activity. Unsettled to active
levels are expected by 05 Nov as CH HSS and CME effects wane.
:Issued: 2021 Nov 03 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity reached moderate levels due to a long duration M1/1f
flare from Region 2891 (N16W13, Dai/beta). Associated with this flare
was an F10 cm radio burst (110 pfu) and a halo CME first observed in
SOHO/LASCO C2 imagery at 02/0248 UTC. Analysis of the CME indicated a
likely Earth-directed component with an estimated arrival time at Earth
of late on 03 Nov to early on 04 Nov.
Region 2887 (S26W78, Hax/alpha) was responsible for a long duration C1
flare at 01/1801 UTC off the SW limb. This flare also had an associated
CME that was first visible in LASCO C2 imagery at 01/1824 UTC. This was
followed by what appeared to be a double CME event off the W and SW limb
at 01/2124 UTC associated with a C4/Sf flare at 01/2133 UTC. Analysis of
the CMEs from 2887 indicated that the plasma associated with these
events is likely to be swept up in the CME from the M1 flare mentioned
earlier.
An additional CME was observed departing the southwest limb at
approximately 02/1200 UTC. Analysis is underway to determine if this CME
has an Earth-directed component as well.
The trailer spots of Region 2891 appeared to show consolidation and weak
shear while most of the intermediate spots decayed. Region 2893 (N16E44,
Hsx/alpha) was quiet and stable.
.Forecast...
Solar activity is expected to be low, with a chance for additional
M-class flare activity (R1-R2, Minor-Moderate Radio Blackouts), over
03-05 Nov.
Energetic Particle
.24 hr Summary...
The greater than 10 MeV proton flux remained elevated above background
levels near 2-3 pfu, but well below the 10 pfu (S1-minor) threshold. The
greater than 2 MeV electron flux was at normal to moderate levels.
.Forecast...
There is a slight chance for the greater than 10 MeV proton flux to
reach the S1 (Minor) solar radiation storm threshold 03-04 Nov. The
greater than 2 MeV electron flux is expected to be at normal to moderate
levels on 03-05 Nov.
Solar Wind
.24 hr Summary...
Solar wind parameters indicated the connection to a positive polarity CH
HSS from a northern crown extension. Total field began the period near
15 nT before gradually decreasing to near 4 nT by the end of the period.
The Bz component fluctuated between +15/-12 nT early, but ended the
period near neutral to near 1 nT. Solar wind speed increased from
approximately 335 km/s early in the period to around 600 km/s by
periods end. The phi angle was mostly oriented in a positive sector
with several brief oscillations into the negative sector.
.Forecast...
Solar wind parameters are anticipated to remain enhanced through most of
03 Nov as CH influence persists. By late on 03 Nov to early on 04 Nov, a
conglomeration of CMEs from Regions 2887 and 2891 will likely impact
Earth, causing additional enhancements to the solar wind environment.
Continuing CME/CH HSS effects are expected to persist through the day on
05 Nov.
Geospace
.24 hr Summary...
The geomagnetic field ranged from quiet to active levels due to the
influence of a positive polarity CH HSS.
.Forecast...
Quiet to unsettled levels are expected for most of the day on 03 Nov
ahead of the 02 Nov CMEs. G1 (Minor) geomagnetic storm conditions are
likely, with a chance for an isolated G2 period, late on 03 Nov to early
on 04 Nov due to combined CME/CH HSS activity. Unsettled to active
levels are expected by 05 Nov as CH HSS and CME effects wane.
:Product: Forecast Discussion
:Issued: 2021 Nov 03 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity was low due to an isolated C1 flare at 02/1305 UTC from
Region 2887 (S25W84, Hsx/alpha). Region 2891 (N16W19, Dao/beta-delta)
appeared to show some consolidation within its central spots forming a
weak delta. Region 2893 (N17E37, Hsx/alpha) was quiet and stable.
Just prior to the C1 flare, an 8 degree filament eruption occurred just
to the SE of Region 2887 centered near S31W61 at 02/1137 UTC. This
resulted in a CME off the SW limb in SOHO coronagraph imagery beginning
at 02/1236 UTC. WSA ENLIL modelling of this CME showed no Earth-directed
component. Two other CMEs of note occurred at 02/2148 UTC off the SW
limb and another off the NE limb at 03/0136 UTC. The first could be
observed in SDO/AIA 171 imagery at 02/1730 UTC in the vicinity of Region
2887. The second was likely the result of a filament eruption in the NW
quadrant near N35E50 around 02/1915 UTC. Both arent likely to have an
Earth-directed component, however further analysis will be done as
STEREO coronagraph imagery becomes available.
.Forecast...
Solar activity is likely to be low, with a chance for additional
M-class flare activity (R1-R2, Minor-Moderate Radio Blackouts), over
03-05 Nov.
Energetic Particle
.24 hr Summary...
The greater than 10 MeV proton flux remained elevated above background
levels near 2-3 pfu, but well below the 10 pfu (S1-minor) threshold. The
greater than 2 MeV electron flux was at normal to moderate levels.
.Forecast...
There is a slight chance for the greater than 10 MeV proton flux to
reach the S1 (Minor) solar radiation storm threshold 03-04 Nov. The
greater than 2 MeV electron flux is expected to be at normal to moderate
levels on 03-05 Nov.
Solar Wind
.24 hr Summary...
Solar wind parameters were in decline as HSS activity slowly waned.
Solar wind speed decreased from approximately 630 km/s to near 520 km/s.
Total field ranged from 1-5 nT while the Bz component was between +/-4
nT. Phi angle was mostly positive.
.Forecast...
Solar wind parameters are anticipated to remain enhanced through most of
03 Nov as CH influence slowly wanes. By late on 03 Nov to early on 04
Nov, a series of CMEs from Regions 2887 and 2891 will likely impact
Earth, causing additional enhancements to the solar wind environment.
CME effects are expected to persist through 05 Nov.
Geospace
.24 hr Summary...
The geomagnetic field was quiet to unsettled due to the influence of a
positive polarity CH HSS.
.Forecast...
Quiet to unsettled levels are expected for most of the day on 03 Nov
ahead of the 02 Nov CMEs. G1 (Minor) geomagnetic storm conditions are
likely, with a chance for G2 (Moderate) storm levels, late on 03 Nov to
early on 04 Nov due to combined CME/CH HSS activity. Unsettled to active
levels are expected on 05 Nov as CH HSS and CME effects wane.
:Issued: 2021 Nov 03 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity was low due to an isolated C1 flare at 02/1305 UTC from
Region 2887 (S25W84, Hsx/alpha). Region 2891 (N16W19, Dao/beta-delta)
appeared to show some consolidation within its central spots forming a
weak delta. Region 2893 (N17E37, Hsx/alpha) was quiet and stable.
Just prior to the C1 flare, an 8 degree filament eruption occurred just
to the SE of Region 2887 centered near S31W61 at 02/1137 UTC. This
resulted in a CME off the SW limb in SOHO coronagraph imagery beginning
at 02/1236 UTC. WSA ENLIL modelling of this CME showed no Earth-directed
component. Two other CMEs of note occurred at 02/2148 UTC off the SW
limb and another off the NE limb at 03/0136 UTC. The first could be
observed in SDO/AIA 171 imagery at 02/1730 UTC in the vicinity of Region
2887. The second was likely the result of a filament eruption in the NW
quadrant near N35E50 around 02/1915 UTC. Both arent likely to have an
Earth-directed component, however further analysis will be done as
STEREO coronagraph imagery becomes available.
.Forecast...
Solar activity is likely to be low, with a chance for additional
M-class flare activity (R1-R2, Minor-Moderate Radio Blackouts), over
03-05 Nov.
Energetic Particle
.24 hr Summary...
The greater than 10 MeV proton flux remained elevated above background
levels near 2-3 pfu, but well below the 10 pfu (S1-minor) threshold. The
greater than 2 MeV electron flux was at normal to moderate levels.
.Forecast...
There is a slight chance for the greater than 10 MeV proton flux to
reach the S1 (Minor) solar radiation storm threshold 03-04 Nov. The
greater than 2 MeV electron flux is expected to be at normal to moderate
levels on 03-05 Nov.
Solar Wind
.24 hr Summary...
Solar wind parameters were in decline as HSS activity slowly waned.
Solar wind speed decreased from approximately 630 km/s to near 520 km/s.
Total field ranged from 1-5 nT while the Bz component was between +/-4
nT. Phi angle was mostly positive.
.Forecast...
Solar wind parameters are anticipated to remain enhanced through most of
03 Nov as CH influence slowly wanes. By late on 03 Nov to early on 04
Nov, a series of CMEs from Regions 2887 and 2891 will likely impact
Earth, causing additional enhancements to the solar wind environment.
CME effects are expected to persist through 05 Nov.
Geospace
.24 hr Summary...
The geomagnetic field was quiet to unsettled due to the influence of a
positive polarity CH HSS.
.Forecast...
Quiet to unsettled levels are expected for most of the day on 03 Nov
ahead of the 02 Nov CMEs. G1 (Minor) geomagnetic storm conditions are
likely, with a chance for G2 (Moderate) storm levels, late on 03 Nov to
early on 04 Nov due to combined CME/CH HSS activity. Unsettled to active
levels are expected on 05 Nov as CH HSS and CME effects wane.
Space Weather Message Code: WATA30
Serial Number: 197
Issue Time: 2021 Nov 03 1318 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Nov 04: G2 (Moderate) Nov 05: None (Below G1) Nov 06: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Serial Number: 197
Issue Time: 2021 Nov 03 1318 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Nov 04: G2 (Moderate) Nov 05: None (Below G1) Nov 06: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.