Alerts:
Space Weather Message Code: ALTPX1
Serial Number: 365
Issue Time: 2026 May 26 0035 UTC
ALERT: Proton Event 10meV Integral Flux exceeded 10pfu
Begin Time: 2026 May 26 0010 UTC
Noaa Scale: S1 - Minor
Comment:
NOAA Scale: S1 - Minor
Space Weather Message Code: WARPX1
Serial Number: 625
Issue Time: 2026 May 26 0016 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2026 May 26 0015 UTC
Valid To: 2026 May 26 2359 UTC
Warning Conditions: Onset
Noaa Scale: S1 - Minor
Comment:
NOAA Scale: S1 - Minor
Solar-terrestrial indices for 25 May follow.
Solar flux 139 and estimated planetary A-index 8.
The estimated planetary K-index at 0300 UTC on 26 May was 2.33.
No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
Geo Magnetic Forecast:
NOAA Ap Index Forecast
Observed Ap 24 May 006
Estimated Ap 25 May 006
Predicted Ap 26 May-28 May 006-012-012
NOAA Geomagnetic Activity Probabilities 26 May-28 May
Active 15/35/35
Minor storm 05/10/10
Moderate storm 01/05/05
Strong-Extreme storm 01/01/01
NOAA Kp index forecast 26 May - 28 May
May 26 May 27 May 28
00-03UT 1.67 2.67 3.00
03-06UT 1.67 3.67 3.67
06-09UT 2.00 3.00 3.00
09-12UT 1.67 2.67 2.67
12-15UT 1.67 2.33 2.00
15-18UT 1.67 2.00 1.67
18-21UT 2.00 2.33 2.67
21-00UT 2.00 2.67 1.67
Extended Three Day Forecast:
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 26-May 28 2026 is 3.67 (below NOAA
Scale levels).
NOAA Kp index breakdown May 26-May 28 2026
May 26 May 27 May 28
00-03UT 1.67 2.67 3.00
03-06UT 1.67 3.67 3.67
06-09UT 2.00 3.00 3.00
09-12UT 1.67 2.67 2.67
12-15UT 1.67 2.33 2.00
15-18UT 1.67 2.00 1.67
18-21UT 2.00 2.33 2.67
21-00UT 2.00 2.67 1.67
Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No
significant transient or recurrent solar wind features are forecast.
B. NOAA Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-19 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for May 26-May 28 2026
May 26 May 27 May 28
S1 or greater 50% 5% 5%
Rationale: There is a chance for S1 (Minor) or greater solar radiation
storms due to activity beyond the NW limb.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for May 26-May 28 2026
May 26 May 27 May 28
R1-R2 35% 35% 35%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
all three days.
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
Solar activity remained at low levels, with occasional C-class flaring
observed. The largest event of the period was a C3.7/Sf flare at 25/0104
UTC from Region 4447 (S17E11, Dso/beta).
There are currently nine numbered regions on the visible disk. As Region
4446 (S14E45, Hax/alpha) rotated further into view, it was resolved as
two distinct groups and split into Region 4446 and new Region 4449
(S10E50, Dao/beta). Region 4447 underwent notable growth with new flux
emergence and consolidation of both poles. Region 4448 (S07E55,
Dao/beta) and Region 4445 (N07E26, Cro/beta) also exhibited some growth.
Two additional regions, 4450 (N10E49, Bxo/beta) and 4451 (S16E65,
Cro/beta). The remaining regions on the disk showed minor changes or
slight signs of decay.
Additional activity included partial halo CME from beyond the Northwest
limb that was observed in LASCO C2 beginning at 25/2212 UTC. Due to the
location of origin, no geoeffective impact is expected.
No Earth-directed CMEs were observed in coronagraph imagery.
.Forecast...
Solar activity is expected to remain at low levels through 28 May, with
an increasing chance for isolated M-class flares (R1-R2/Minor-Moderate)
due to the activity of Region 4447 and the expected rotation into view
of active far-side regions that supported by coronal activity observed
beyond the east limb.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux at geosynchronous orbit was at low
to moderate levels, with a peak flux of 371 pfu observed at 25/0205 UTC.
The greater than 10 MeV proton flux and the 100 MeV flux became elevated
late in the period but well below threshold values as a result of far
side activity from beyond the NW limb.
.Forecast...
The greater than 2 MeV electron flux is expected to remain at low to
moderate levels through 28 May. There is a chance (50%) for the greater
than 10 MeV proton flux to reach S1 levels, and a slight chance (20%)
for the 100 MeV flux to reach 1 pfu on 26 May. A return to background
values is expected for 27-28 May.
Solar Wind
.24 hr Summary...
Solar wind parameters reflected near-background conditions, heavily
influenced by interactions with the heliospheric current sheet. The phi
angle was variable structure, recording several distinct solar sector
boundary crossings before remaining in the negative (towards the Sun)
sector after approximately 25/1400 UTC. This boundary transition
coincided with a drop in density and changes in the components of the
interplanetary magnetic field. Total magnetic field (Bt) was variable
across the period, ranging from a peak of 9.5 nT down to less than 2 nT.
The north-south (Bz) component was similarly variable, but mostly
southward with a maximum deflection of -7 nT. Solar wind speeds started
the period around 300 km/s before rising slightly following the 1530 UTC
transition to finish the period near 400 km/s.
.Forecast...
Solar wind parameters are anticipated to at or around ambient levels
through 26 May. Enhancements are anticipated on 27 May ahead of the
arrival of a relatively weak negative polarity coronal hole high-speed
stream (-CH HSS) and will persist through 28 May.
Geospace
.24 hr Summary...
The geomagnetic field was at quiet to unsettled levels throughout the
reporting period.
.Forecast...
The geomagnetic field is anticipated to be at mostly quiet levels on 26
May as near-background solar wind conditions persist. An increase to
unsettled to active levels is likely late on 26 May and into 27 May due
to the anticipated onset and influence of a -CH HSS.
27 Day Forecast:
Date | Radio Flux | Planetary A Index | Largest Kp Index
2026 May 25 140 5 2
2026 May 26 145 8 3
2026 May 27 150 12 4
2026 May 28 140 12 4
2026 May 29 140 8 3
2026 May 30 145 5 2
2026 May 31 145 5 2
2026 Jun 01 145 5 2
2026 Jun 02 145 5 2
2026 Jun 03 150 5 2
2026 Jun 04 145 15 4
2026 Jun 05 140 5 2
2026 Jun 06 135 5 2
2026 Jun 07 135 5 2
2026 Jun 08 130 5 2
2026 Jun 09 125 12 4
2026 Jun 10 130 5 2
2026 Jun 11 130 30 6
2026 Jun 12 125 25 5
2026 Jun 13 120 12 4
2026 Jun 14 115 10 3
2026 Jun 15 115 8 3
2026 Jun 16 110 5 2
2026 Jun 17 110 5 2
2026 Jun 18 110 5 2
2026 Jun 19 115 5 2
2026 Jun 20 120 5 2
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.
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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