Alerts:
Space Weather Message Code: ALTK05
Serial Number: 2001
Issue Time: 2026 Apr 02 2052 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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: WATA30
Serial Number: 270
Issue Time: 2026 Apr 02 1743 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Apr 02: G2 (Moderate) Apr 03: G2 (Moderate) Apr 04: G2 (Moderate)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
Space Weather Message Code: WARK06
Serial Number: 651
Issue Time: 2026 Apr 02 1711 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 650
Valid From: 2026 Apr 02 0753 UTC
Now Valid Until: 2026 Apr 03 0900 UTC
Warning Condition: Persistence
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.
Space Weather Message Code: WARK05
Serial Number: 2220
Issue Time: 2026 Apr 02 1711 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2219
Valid From: 2026 Apr 02 0230 UTC
Now Valid Until: 2026 Apr 03 1500 UTC
Warning Condition: Persistence
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: 5309
Issue Time: 2026 Apr 02 1711 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5308
Valid From: 2026 Apr 02 0047 UTC
Now Valid Until: 2026 Apr 03 2359 UTC
Warning Condition: Persistence
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.
Space Weather Message Code: ALTK06
Serial Number: 709
Issue Time: 2026 Apr 02 1711 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
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.
Space Weather Message Code: ALTK05
Serial Number: 2000
Issue Time: 2026 Apr 02 1629 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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: ALTK05
Serial Number: 1999
Issue Time: 2026 Apr 02 1432 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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: ALTK05
Serial Number: 1998
Issue Time: 2026 Apr 02 1022 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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: WARK06
Serial Number: 650
Issue Time: 2026 Apr 02 0753 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Apr 02 0753 UTC
Valid To: 2026 Apr 02 1800 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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.
Space Weather Message Code: WARK05
Serial Number: 2219
Issue Time: 2026 Apr 02 0753 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2218
Valid From: 2026 Apr 02 0230 UTC
Now Valid Until: 2026 Apr 02 1800 UTC
Warning Condition: Persistence
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: 5308
Issue Time: 2026 Apr 02 0751 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5307
Valid From: 2026 Apr 02 0047 UTC
Now Valid Until: 2026 Apr 02 2359 UTC
Warning Condition: Persistence
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.
Space Weather Message Code: ALTK05
Serial Number: 1997
Issue Time: 2026 Apr 02 0750 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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: ALTK05
Serial Number: 1996
Issue Time: 2026 Apr 02 0301 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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: WARK05
Serial Number: 2218
Issue Time: 2026 Apr 02 0230 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Apr 02 0230 UTC
Valid To: 2026 Apr 02 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
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: ALTK04
Serial Number: 2648
Issue Time: 2026 Apr 02 0220 UTC
ALERT: Geomagnetic K-index of 4
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
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.
Solar-terrestrial indices for 02 April follow.
Solar flux 140 and estimated planetary A-index 43.
The estimated planetary K-index at 0000 UTC on 03 April was 3.67.
Space weather for the past 24 hours has been moderate.
Geomagnetic storms reaching the G2 level occurred.
Radio blackouts reaching the R1 level occurred.
Space weather for the next 24 hours is predicted to be moderate.
Geomagnetic storms reaching the G2 level are expected.
Radio blackouts reaching the R2 level are likely.
Geo Magnetic Forecast:
NOAA Ap Index Forecast
Observed Ap 01 Apr 009
Estimated Ap 02 Apr 048
Predicted Ap 03 Apr-05 Apr 037-044-016
NOAA Geomagnetic Activity Probabilities 03 Apr-05 Apr
Active 05/01/35
Minor storm 30/35/20
Moderate storm 40/40/01
Strong-Extreme storm 25/25/01
NOAA Kp index forecast 03 Apr - 05 Apr
Apr 03 Apr 04 Apr 05
00-03UT 5.33 6.00 3.67
03-06UT 4.00 6.00 2.00
06-09UT 5.67 5.67 3.00
09-12UT 3.33 3.67 3.00
12-15UT 4.67 3.33 3.00
15-18UT 2.33 4.67 3.33
18-21UT 4.33 3.67 3.33
21-00UT 5.00 4.00 3.33
Extended Three Day Forecast:
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 6 (NOAA Scale
G2).
The greatest expected 3 hr Kp for Apr 03-Apr 05 2026 is 6.00 (NOAA Scale
G2).
NOAA Kp index breakdown Apr 03-Apr 05 2026
Apr 03 Apr 04 Apr 05
00-03UT 5.33 (G1) 6.00 (G2) 3.67
03-06UT 4.00 6.00 (G2) 2.00
06-09UT 5.67 (G2) 5.67 (G2) 3.00
09-12UT 3.33 3.67 3.00
12-15UT 4.67 (G1) 3.33 3.00
15-18UT 2.67 4.67 (G1) 3.33
18-21UT 4.33 3.67 3.33
21-00UT 4.67 (G1) 4.00 3.33
Rationale: The geomagnetic field is expected to reach G1-G2
(Minor-Moderate) levels on 03 Apr due to continued CH HSS activity.
G1-G2 (Minor-Moderate) levels, with a chance for G3 (Strong), are likely
from late on 03 Apr and through 04 Apr due to anticipated effects from
the arrival of a CME that left the Sun on 01 Apr. A decrease to active
levels is expected over 05 Apr as solar wind enhancements wane.
B. NOAA Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for Apr 03-Apr 05 2026
Apr 03 Apr 04 Apr 05
S1 or greater 50% 50% 25%
Rationale: There is a chance for the greater than 10 MeV proton flux to
exceed S1 (Minor) solar radiation storm levels over 03-05 Apr due
primarily to the CME associated with the filament eruption from 01 Apr.
C. NOAA Radio Blackout Activity and Forecast
Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Apr 02 2026 1815 UTC.
Radio Blackout Forecast for Apr 03-Apr 05 2026
Apr 03 Apr 04 Apr 05
R1-R2 55% 55% 55%
R3 or greater 20% 20% 20%
Rationale: Solar activity is likely to reach moderate
(R1/R2-Minor/Moderate) levels, with slight chance for X-class
(R3-Strong) flares over 03-05 Apr, due primarily to the flare potential
of Regions 4404, 4405 and 4409.
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
Solar activity reached moderate levels due to an M3.5/2b flare which
peaked at 02/1815 UTC from Region 4404 (N13W21, Cso/beta). Subsequent
coronagraph imagery contained a narrow CME signature to the NW beginning
after 02/1848 UTC in SOHO/LASCO C2 imagery. Modeling of the event is
ongoing.
Region 4409 (N02E13, Dai/beta-gamma) continued to develop additional
spots and area over the past 24 hours. The remaining spotted active
regions on the visible disk were either mostly stable or in gradual
decay.
.Forecast...
Solar activity is likely to reach moderate (R1/R2-Minor/Moderate)
levels, with slight chance for X-class (R3-Strong) flares over 03-05
Apr, due primarily to the flare potential of Regions 4404, 4405 and
4409.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux at geosynchronous orbit were at
normal to moderate levels. The greater than 10 MeV proton flux
at geosynchronous orbit remained below S1 (Minor) levels but continued
to gradually increase, likely associated with a filament eruption on 01
Apr.
.Forecast...
The greater than 2 MeV electron flux is likely to return to high levels
03 and 04 Apr due to HSS influence. There is a chance for the greater
than 10 MeV proton flux to exceed S1 (Minor) solar radiation storm
levels over 03-05 Apr due primarily to the CME associated with the
filament eruption from 01 Apr.
Solar Wind
.24 hr Summary...
Solar wind parameters suggested a transition from a CME to influence
from a negative polarity coronal hole. Total magnetic field strength
reached a peak of 17 nT but eventually settled near the 5-6 nT range by
the end of the UT day. The Bz component was primarily oriented
southward, with a peak negative value of -16 nT. Solar wind speeds
increased from ~435 km/s to ~700 km/s by the end of the period. Phi was
predominantly negative.
.Forecast...
Solar wind parameters are expected to continue to be enhanced under HSS
conditions through 05 Apr. Additional enhancements from a glancing blow
from the 01 Apr CME are expected late on 03 Apr to early on 04 Apr.
Geospace
.24 hr Summary...
The geomagnetic field ranged from active to G2 (Moderate) geomagnetic
storm levels.
.Forecast...
The geomagnetic field is expected to reach G1-G2 (Minor-Moderate) levels
on 03 Apr due to continued CH HSS activity. G1-G2 (Minor-Moderate)
levels, with a chance for G3 (Strong), are likely from late on 03 Apr
and through 04 Apr due to anticipated effects from the arrival of a CME
that left the Sun on 01 Apr. A decrease to active levels is expected
over 05 Apr as solar wind enhancements wane.
27 Day Forecast:
Date | Radio Flux | Planetary A Index | Largest Kp Index
2026 Mar 30 155 22 5
2026 Mar 31 152 12 4
2026 Apr 01 155 8 3
2026 Apr 02 155 5 2
2026 Apr 03 150 18 4
2026 Apr 04 145 22 5
2026 Apr 05 145 10 3
2026 Apr 06 135 15 4
2026 Apr 07 125 8 3
2026 Apr 08 118 7 2
2026 Apr 09 120 25 5
2026 Apr 10 110 40 6
2026 Apr 11 112 20 5
2026 Apr 12 115 12 4
2026 Apr 13 115 8 3
2026 Apr 14 110 7 2
2026 Apr 15 115 5 2
2026 Apr 16 115 4 2
2026 Apr 17 120 7 2
2026 Apr 18 122 48 6
2026 Apr 19 124 22 5
2026 Apr 20 130 12 4
2026 Apr 21 140 12 4
2026 Apr 22 150 8 3
2026 Apr 23 155 5 2
2026 Apr 24 160 8 3
2026 Apr 25 155 15 4
v4.16b
v4.X Release 17th Dec 2020)
Fixed New GOES and HPI inputs from noaa for Json (17/12/20).
Addded the ability to add 2 custom Magnetometers in settings (comming soon) (18/10/19).
Improved Hobart Magnetometer code. (18/18/19)
Move all presets into their own pop out side menu. (19/06/19)
Added Composite weather maps (TAS, VIC and SA), thanks to Oz forecast! (19/06/19)
UI Upgrades, Name, Logo and Website Site Changes.
Added custom line widths for most items.
Added GOES Difference (#1 - #2)
Added Ovation-prime model outputs.
v3.8x
Various Updates, New AF Index Algo. (8/12/18)
v3.6x
Added more Presets. Disabled Presets overwriting graph views (6/7/18)
Added GeoSpace Kp Model Prediction. (3/7/18)
Added SWPC Kp Forecast + Observation. (2/7/18)
Removed WingKP and USKp. :( No longer Avaliable. (2/7/18)
Removed feed from www.dunedinaurora.nz (Unreliable). (2/7/18)
Updates to latest JQuery, JQuery Mobile and AmCharts etc. (2/7/18)
Enhanced Pro setting with Dynamic Preasure. (2/7/18)
Added Quickselect preset buttons to main page. (2/7/18)
v3.5x
Added Ruru Observatory Magnetometer. (25/4/28)
Added Forecast Sub Tabset. (1/3/18)
Added Extended Discussion Text, 27Day FC (1/3/18)
Removed Dial, and Added Forecast Report. (28/2/18)
Updated A few settings for better visilation. (28/2/18)
Updated Goes-13 is Now Goes-14 (15/2/18)
Improved Commmunity Activity for faster loads.
Consolidated Proton Density / Dynamic Preasure.
Added Additional Balloon Text.
Added TAFS Visual Probability in %.
User Interface Upgrades.
Add 'Dial' for the basics, with default support.
Added one click presets.
v2.1 - v2.49
Added 'Automatic Chart Update' option in settings.
Database caching enabled, significant load time improvements.
Extension to max 96 hours of data, up from 24.
Added ACE Bt,Bx and By for comparison.
Added More User Presets.
Fixed Orentation Change Alert.
Small layout changes.
Added Header Image.
Removed Top Header to fee up Space, Refresh added to Chart Tab.
Added Community Activity Indicator
Fixed MAG value issues in graph.
Added Second Hobart MAG Source.
Updated Comment Features (Disable).
v2.0
Fixed DSCOVR B? display bug.
Added MAG Stack Feature.
Upgrade to json feeds.
Feeds are timezone and forecast aware, making them super fast.
DB Optimisation, improved DB search times.
Charts are now zoomable, allow selection and export.
Added USAF Kp, Updated Wing Kp.
Added Ovation Aurora Short Term Forecast.
Added Macquarie Island MAG feed.
Added Mawson MAG Feed.
Added Canberra Feed.
Added MAG feed from www.dunedinaurora.nz (Portobello).
Added Brendan's experemental MAG feed (Hobart).
Fixed cookie bug, One Alert is enough for landscape mode.
> v1.0 (Started 20/10/2014)
Mawson and Macquarie Island data is copyright Commonwealth of Australia (Geoscience Australia), and redistributed under Creative Commons v4.
Thanks to INTERMAGNET for promoting high standards of magnetic observatory practice in providing access to these feeds. (www.intermagnet.org).
Local Australian weather composite maps provided by Oz Forecast