:Product: 3-Day Forecast
:Issued: 2025 Oct 23 0034 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 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Oct 23-Oct 25 2025 is 2.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Oct 23-Oct 25 2025

Oct 23 Oct 24 Oct 25
00-03UT 2.00 1.67 2.67
03-06UT 1.67 1.33 2.67
06-09UT 1.33 1.33 2.33
09-12UT 1.00 1.33 2.33
12-15UT 1.00 1.33 2.33
15-18UT 1.33 1.33 2.33
18-21UT 1.67 1.67 2.00
21-00UT 1.67 1.67 2.33

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-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Oct 23-Oct 25 2025

Oct 23 Oct 24 Oct 25
S1 or greater 10% 1% 1%

Rationale: There is a slight chance for S1 (Minor) solar radiation storm
levels to be reached on 23 Oct associated with far-sided events. Chances diminish by 24-25 Oct.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Oct 23-Oct 25 2025

Oct 23 Oct 24 Oct 25
R1-R2 15% 15% 15%
R3 or greater 1% 1% 1%

Rationale: There is a slight chance for isolated R1-R2 (Minor-Moderate)
radio blackouts through 25 Oct.



--- MBSE BBS v1.1.1 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2025 Oct 26 0034 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Oct 26-Oct 28 2025 is 5.00 (NOAA Scale
G1).

NOAA Kp index breakdown Oct 26-Oct 28 2025

Oct 26 Oct 27 Oct 28
00-03UT 2.00 2.00 4.00
03-06UT 1.67 2.00 4.67 (G1)
06-09UT 1.67 2.67 4.00
09-12UT 2.00 3.67 4.00
12-15UT 2.00 3.00 4.33
15-18UT 2.33 2.67 5.00 (G1)
18-21UT 2.67 2.67 4.33
21-00UT 2.33 2.67 5.00 (G1)

Rationale: G1 (Minor) conditions, with a chance for G2 (Moderate), are
likely on 28 Oct due to the anticipated onset of influence from a
positive polarity coronal hole.

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 Oct 26-Oct 28 2025

Oct 26 Oct 27 Oct 28
S1 or greater 1% 1% 1%

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 Oct 26-Oct 28 2025

Oct 26 Oct 27 Oct 28
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%

Rationale: A slight chance for isolated R1-R2 (Minor-Moderate) radio
blackouts continues over 26-28 Oct.



--- MBSE BBS v1.1.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2025 Oct 29 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Oct 29-Oct 31 2025 is 5.00 (NOAA Scale
G1).

NOAA Kp index breakdown Oct 29-Oct 31 2025

Oct 29 Oct 30 Oct 31
00-03UT 4.33 4.67 (G1) 3.67
03-06UT 5.00 (G1) 4.00 3.67
06-09UT 4.33 4.00 3.33
09-12UT 3.67 3.67 3.00
12-15UT 3.00 3.67 3.00
15-18UT 4.00 4.00 3.33
18-21UT 4.67 (G1) 3.33 3.00
21-00UT 4.00 3.33 3.00

Rationale: G1 (Minor) conditions, with a chance for G2 (Moderate)
levels, are likely on 29-30 Oct due to the anticipated onset of a CH
HSS.

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 Oct 29-Oct 31 2025

Oct 29 Oct 30 Oct 31
S1 or greater 1% 1% 1%

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 Oct 29-Oct 31 2025

Oct 29 Oct 30 Oct 31
R1-R2 5% 5% 5%
R3 or greater 1% 1% 1%

Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast.



--- MBSE BBS v1.1.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2025 Nov 01 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 Nov 01-Nov 03 2025 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Nov 01-Nov 03 2025

Nov 01 Nov 02 Nov 03
00-03UT 4.00 3.33 2.67
03-06UT 3.33 4.00 3.67
06-09UT 3.33 3.33 3.00
09-12UT 3.00 2.67 2.67
12-15UT 3.67 2.33 2.33
15-18UT 2.67 2.00 2.33
18-21UT 2.67 2.33 2.00
21-00UT 3.33 3.33 2.67

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-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Nov 01-Nov 03 2025

Nov 01 Nov 02 Nov 03
S1 or greater 1% 5% 10%

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 Nov 01-Nov 03 2025

Nov 01 Nov 02 Nov 03
R1-R2 25% 35% 45%
R3 or greater 5% 10% 10%

Rationale: There is an increasing chance for R1-R2 (Minor-Moderate)
radio blackouts all three days. A slight chance exists for R3 (Major) or greater blackouts on 02-03 Nov.



--- MBSE BBS v1.1.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)

:Product: 3-Day Forecast
:Issued: 2025 Nov 04 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Nov 04-Nov 06 2025 is 4.67 (NOAA Scale
G1).

NOAA Kp index breakdown Nov 04-Nov 06 2025

Nov 04 Nov 05 Nov 06
00-03UT 2.67 1.67 2.33
03-06UT 2.67 1.33 3.00
06-09UT 2.33 1.33 3.00
09-12UT 2.33 1.33 3.00
12-15UT 2.33 1.33 3.00
15-18UT 2.33 1.33 3.33
18-21UT 2.00 1.67 3.33
21-00UT 2.33 1.67 4.67 (G1)

Rationale: G1 (Minor) geomagnetic storms are likely on 06 Nov due to
CME/HSS arrival.

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 Nov 04-Nov 06 2025

Nov 04 Nov 05 Nov 06
S1 or greater 1% 1% 1%

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

Radio blackouts reaching the R2 levels were observed over the past 24
hours. The largest was at Nov 03 2025 1011 UTC.

Radio Blackout Forecast for Nov 04-Nov 06 2025

Nov 04 Nov 05 Nov 06
R1-R2 55% 55% 55%
R3 or greater 10% 10% 10%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for an isolated (R3-Strong) event through 06 Nov.



--- MBSE BBS v1.1.2 (Linux-x86_64)
* Origin: Outpost BBS * Johnson City, TN (618:618/1)