Alerts:
Space Weather Message Code: WARK04
Serial Number: 5374
Issue Time: 2026 Jul 03 1209 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Jul 03 1209 UTC
Valid To: 2026 Jul 04 0300 UTC
Warning Conditions: Onset
Comment:
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: WARSUD
Serial Number: 256
Issue Time: 2026 Jul 03 1138 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Jul 03 1157 UTC
Valid To: 2026 Jul 03 1227 UTC
Ip Shock: 2026-07-03 11:20
Comment:
Space Weather Message Code: WATA30
Serial Number: 278
Issue Time: 2026 Jul 03 1123 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Jul 03: G2 (Moderate) Jul 04: G2 (Moderate) Jul 05: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Added G1 (Minor) Watch for 05 Jul.
Added G1 (Minor) Watch for 05 Jul.
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.
Solar-terrestrial indices for 02 July follow.
Solar flux 203 and estimated planetary A-index 4.
The estimated planetary K-index at 1200 UTC on 03 July was 1.33.
Space weather for the past 24 hours has been minor.
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 likely.
Radio blackouts reaching the R2 level are likely.
Geo Magnetic Forecast:
NOAA Ap Index Forecast
Observed Ap 01 Jul 014
Estimated Ap 02 Jul 005
Predicted Ap 03 Jul-05 Jul 040-030-018
NOAA Geomagnetic Activity Probabilities 03 Jul-05 Jul
Active 20/25/30
Minor storm 30/30/30
Moderate storm 35/30/10
Strong-Extreme storm 10/10/01
NOAA Kp index forecast 03 Jul - 05 Jul
Jul 03 Jul 04 Jul 05
00-03UT 2.33 5.67 2.67
03-06UT 2.33 4.67 2.33
06-09UT 4.67 4.33 2.33
09-12UT 5.67 4.33 2.33
12-15UT 5.67 3.67 2.33
15-18UT 4.67 3.67 2.33
18-21UT 4.67 3.33 4.67
21-00UT 5.00 2.33 5.00
Extended Three Day Forecast:
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jul 03-Jul 05 2026 is 5.67 (NOAA Scale
G2).
NOAA Kp index breakdown Jul 03-Jul 05 2026
Jul 03 Jul 04 Jul 05
00-03UT 2.33 5.67 (G2) 2.67
03-06UT 2.33 4.67 (G1) 2.33
06-09UT 4.67 (G1) 4.33 2.33
09-12UT 5.67 (G2) 4.33 2.33
12-15UT 5.67 (G2) 3.67 2.33
15-18UT 4.67 (G1) 3.67 2.33
18-21UT 4.67 (G1) 3.33 4.67 (G1)
21-00UT 5.00 (G1) 2.33 5.00 (G1)
Rationale: G1-G2 (Minor-Moderate) geomagnetic storming conditions are
anticipated 03-04 Jul due to a CME that left the Sun on 30 Jun. G1
conditions are also anticipated late on 05 Jul due to a CME that left
the Sun on 01 Jul.
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 Jul 03-Jul 05 2026
Jul 03 Jul 04 Jul 05
S1 or greater 20% 20% 20%
Rationale: There is a slight chance for S1 (Minor) or greater solar
radiation storms through 05 Jul due to the anticipated arrivals of
several CMEs.
C. NOAA Radio Blackout Activity and Forecast
Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Jul 02 2026 0156 UTC.
Radio Blackout Forecast for Jul 03-Jul 05 2026
Jul 03 Jul 04 Jul 05
R1-R2 70% 70% 70%
R3 or greater 20% 20% 20%
Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for R3 (Strong) or greater events, through 05 Jul.
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
A series of M-class flares kept solar activity at moderate levels (R1
Minor), with flare activity observed from Regions 4479 (N17W52,
Eki/beta-gamma-delta) and 4480 (S16W56, Eai/beta-gamma). Region 4479
produced the largest flare of the period, an M4.2/Sf observed at 02/0156
UTC. All of the flare activity over the past 36 hours produced some form
of Earth-directed CME activity reflected in the solar wind and geospace
forecast. Over the past 24 hours, the largest region on the disk, Region
4478 (S05W33, Fki/beta-gamma-delta), remained mostly quiet.
An 1n H-alpha flare, which peaked at 01/1211 UTC, appears to have been
associated with dimming and a slow moving CME with an Earth-directed
component first identified in CCOR-1 imagery around 01/1400 UTC. An
additional CME was observed in C2 imagery beginning near 02/0236 UTC.
This CME is presumed to be associated with a long duration M4.2 flare
from Region 4479. Modeling efforts suggest this CME will catch up to and
overtake the one mentioned above with an estimated arrival on late 05 to
early 06 July.
A narrow eruption north of the solar disk was first seen in LASCO C2 at
02/1224 UTC. It is also seen to the north-east in STEREO coronagraph
imagery, indicating an Earth-facing source; however, imagery suggests
the eruption may be too far north of the ecliptic for an Earth-directed
component. Modeling is currently ongoing to confirm.
.Forecast...
Solar activity is likely to remain at moderate levels (R1-R2,
Minor-Moderate) with a slight chance for X-class flares (R3-Strong),
through 05 Jul, from Region 4478, 4479 and 4480.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux at geosynchronous orbit was at
normal to moderate levels, while the greater than 10 MeV proton flux
remained at background levels.
.Forecast...
The greater than 2 MeV electron flux is expected to increase to moderate
to high levels on 03-05 Jul. There is a slight chance for a greater than
10 MeV proton event (S1-Minor) due to the flare potential of Regions
4479 and 4478 on 03-05 Jul.
Solar Wind
.24 hr Summary...
Solar wind parameters were at predominately background levels during the
period. Total field strength gradually decreased from about 9 to 6 nT,
while the Bz component was mostly north to 9 nT before turning mostly
south to -2 nT after 02/1211 UTC. Solar wind speeds gradually decreased
from about 400 km/s to near 325 km/s by periods end. The phi angle was
in a mostly negative orientation.
.Forecast...
The CME from 30 Jun is expected to arrive early to mid UTC day on 03
July, bringing disturbed solar wind conditions that are expected to
persist into early 04 July. Additional CME activity from 01-02 Jul
events are expected later on 04 to 05 Jul, persisting through 05 Jul and
beyond.
Geospace
.24 hr Summary...
The geomagnetic field activity was at quiet levels.
.Forecast...
CME arrival from the event on 30 June is expected to bring G1-G2
(Minor-Moderate) geomagnetic storm conditions beginning on 03 July and
continuing into 04 Jul. Additional CME activity from 01-02 Jul is
expected to bring active to G1 (Minor) storm conditions.
27 Day Forecast:
Date | Radio Flux | Planetary A Index | Largest Kp Index
2026 Jun 29 175 10 5
2026 Jun 30 180 25 5
2026 Jul 01 175 12 4
2026 Jul 02 170 8 3
2026 Jul 03 175 5 2
2026 Jul 04 170 5 2
2026 Jul 05 160 5 2
2026 Jul 06 160 5 2
2026 Jul 07 155 5 2
2026 Jul 08 155 12 4
2026 Jul 09 150 12 4
2026 Jul 10 140 8 3
2026 Jul 11 140 5 2
2026 Jul 12 135 5 2
2026 Jul 13 130 5 2
2026 Jul 14 135 5 2
2026 Jul 15 140 5 2
2026 Jul 16 140 10 3
2026 Jul 17 145 8 3
2026 Jul 18 150 5 2
2026 Jul 19 145 5 2
2026 Jul 20 145 5 2
2026 Jul 21 145 5 2
2026 Jul 22 150 15 5
2026 Jul 23 155 12 4
2026 Jul 24 155 8 3
2026 Jul 25 155 8 3
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
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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.
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Added Additional Balloon Text.
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User Interface Upgrades.
Add 'Dial' for the basics, with default support.
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Added 'Automatic Chart Update' option in settings.
Database caching enabled, significant load time improvements.
Extension to max 96 hours of data, up from 24.
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Added More User Presets.
Fixed Orentation Change Alert.
Small layout changes.
Added Header Image.
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Fixed MAG value issues in graph.
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v2.0
Fixed DSCOVR B? display bug.
Added MAG Stack Feature.
Upgrade to json feeds.
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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.
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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