| TYPE | RADIO BLACKOUT | SOLAR STORM | GEO STORM |
|---|---|---|---|
| SCALE | 1-2: 5%, 3-5: 40% | 5% | 1 |
| TEXT | None | S1 or < | none |
| TYPE | RADIO BLACKOUT | SOLAR STORM | GEO STORM |
|---|---|---|---|
| SCALE | 0 | 0 | 0 |
| TEXT | none | none | none |
| TYPE | RADIO BLACKOUT | SOLAR STORM | GEO STORM |
|---|---|---|---|
| SCALE | 1-2: 5%, 3-5: 5% | 5% | 0 |
| TEXT | None | S1 or < | none |
:Product: 3-Day Forecast
:Issued: 2025 Jun 12 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Jun 12-Jun 14 2025 is 5.67 (NOAA Scale
G2).
NOAA Kp index breakdown Jun 12-Jun 14 2025
Jun 12 Jun 13 Jun 14
00-03UT 4.67 (G1) 3.67 3.33
03-06UT 4.67 (G1) 3.33 3.33
06-09UT 3.67 3.33 3.67
09-12UT 3.67 2.67 4.33
12-15UT 3.00 2.67 4.33
15-18UT 2.33 2.67 4.00
18-21UT 2.33 3.00 4.67 (G1)
21-00UT 2.33 2.33 5.67 (G2)
Rationale: G1 (Minor) geomagnetic storms are expected early on 12 Jun
due to sustained southward Bz. G1-G2 storming is likely again 14
Jun due to recurrent CH HSS influences.
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 Jun 12-Jun 14 2025
Jun 12 Jun 13 Jun 14
S1 or greater 5% 5% 5%
Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Jun 12-Jun 14 2025
Jun 12 Jun 13 Jun 14
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
all three days.
Updated last 2025/06/12 08:40 UTC
-------------------
Product ID: K05W
Issued: 2025-06-12 05:09:18.000
Message Follows:
Space Weather Message Code: WARK05
Serial Number: 2063
Issue Time: 2025 Jun 12 0509 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2062
Valid From: 2025 Jun 11 2255 UTC
Now Valid Until: 2025 Jun 12 1200 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 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 ID: K05A
Issued: 2025-06-12 03:01:24.420
Message Follows:
Space Weather Message Code: ALTK05
Serial Number: 1808
Issue Time: 2025 Jun 12 0301 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Jun 12 0243 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
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.
-------------------
Product ID: K05A
Issued: 2025-06-11 23:46:14.187
Message Follows:
Space Weather Message Code: ALTK05
Serial Number: 1807
Issue Time: 2025 Jun 11 2346 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Jun 11 2341 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
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.
-------------------
Product ID: K04W
Issued: 2025-06-11 22:59:58.947
Message Follows:
Space Weather Message Code: WARK04
Serial Number: 4996
Issue Time: 2025 Jun 11 2259 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4995
Valid From: 2025 Jun 11 1710 UTC
Now Valid Until: 2025 Jun 12 1200 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 ID: K05W
Issued: 2025-06-11 22:55:55.343
Message Follows:
Space Weather Message Code: WARK05
Serial Number: 2062
Issue Time: 2025 Jun 11 2255 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Jun 11 2255 UTC
Valid To: 2025 Jun 12 0600 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.
-------------------
Product ID: A30F
Issued: 2025-06-11 19:26:00.713
Message Follows:
Space Weather Message Code: WATA30
Serial Number: 253
Issue Time: 2025 Jun 11 1926 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Jun 12: None (Below G1) Jun 13: None (Below G1) Jun 14: G2 (Moderate)
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.
-------------------
Product ID: K04A
Issued: 2025-06-11 18:01:31.860
Message Follows:
Space Weather Message Code: ALTK04
Serial Number: 2565
Issue Time: 2025 Jun 11 1801 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Jun 11 1759 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
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 ID: K04W
Issued: 2025-06-11 17:10:15.277
Message Follows:
Space Weather Message Code: WARK04
Serial Number: 4995
Issue Time: 2025 Jun 11 1710 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Jun 11 1710 UTC
Valid To: 2025 Jun 12 0100 UTC
Warning Condition: Onset
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 ID: K04W
Issued: 2025-06-11 00:30:48.343
Message Follows:
Space Weather Message Code: WARK04
Serial Number: 4994
Issue Time: 2025 Jun 11 0030 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Jun 11 0030 UTC
Valid To: 2025 Jun 11 0600 UTC
Warning Condition: Onset
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 ID: K04W
Issued: 2025-06-09 10:54:32.747
Message Follows:
Space Weather Message Code: WARK04
Serial Number: 4993
Issue Time: 2025 Jun 09 1054 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4992
Valid From: 2025 Jun 07 0843 UTC
Now Valid Until: 2025 Jun 09 2359 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 ID: K05W
Issued: 2025-06-08 21:37:10.943
Message Follows:
Space Weather Message Code: WARK05
Serial Number: 2061
Issue Time: 2025 Jun 08 2137 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Jun 08 2136 UTC
Valid To: 2025 Jun 09 1200 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.
Current 2025 Jun 11 1205 UTC
Solar-terrestrial indices for 10 June follow.
Solar flux 129 and estimated planetary A-index 9.
The estimated planetary K-index at 1200 UTC on 11 June was 1.67.
No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
Official Space Weather Advisory issued by NOAA Space Weather Prediction Center
Boulder, Colorado, USA
SPACE WEATHER ADVISORY OUTLOOK #25-19
2025 June 8 at 8:09 p.m. MDT (2025 June 9 0209 UTC)
**** SPACE WEATHER OUTLOOK ****
Summary For June 2-8
R1 (Minor) radio blackouts were observed on 02-04 June.
G1 (Minor) geomagetic storms were observed on 02-04 and 07 June.
G2 (Moderate) geomagnetic storms were observed on 02-03 June.
G3 (Strong) geomagnetic storms were observed on 02-03 June.
S1 (Minor) radiation storms were observed on 02 June.
No other significant space weather was observed.
Outlook For June 9-15
A chance for R1-R2 (Minor-Moderate) radio blackouts exists on 09-15 June.
A chance for G1 (Minor) geomagnetic storms exists on 09, 14-15 June.
A chance for G2 (Moderate) geomagnetic storms exists on 14 June.
No other significant space weather is forecasted during the outlook period.