Message:19697 In: SPACWX.USA
From: N4SDDate: Fri, 27 Mar 26 12:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather Forecast Discussion
Message-ID: <9892_N4SD>
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FXXX12 KWNP 271231
DAYDIS
:Product: Forecast Discussion
:Issued: 2026 Mar 27 1230 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
# Forecast Discussion
#
Solar Activity
.24 hr Summary...
Solar activity was at low levels with C-class flare activity observed
from Regions 4401 (N25E04, Ekc/beta/gamma), 4403 (N15E47, Hsx/alpha) and
new Region 4405 (S24E75, Cso/beta). In addition to new Region 4405,
Regions 4404 (N14E68, Hsx/alpha) and 4406 (N08E74, Hsx/alpha) were
numbered this period. Region 4401 remains the largest region on the disk
with some recent penumbra development around the intermediate spots.
No Earth-directed CMEs were detected in available coronagraph imagery.
.Forecast...
Solar activity is expected to be low with a chance for M-class
(R1-R2/Minor-Moderate) flares through 29 Mar.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux at at geosynchronous orbit reached
high levels with a peak 11,382 pfu at 26/1435 UTC. The greater than 10
MeV proton flux remained at background levels.
.Forecast...
The greater than 2 MeV electron flux is expected to continue to reach
high levels through 27 Mar before returning to moderate levels 28-29
Mar. The greater than 10 MeV proton flux is expected to continue at
background levels.
Solar Wind
.24 hr Summary...
Solar wind parameters for the majority of the period reflected the
continued waning of a negative polarity coronal hole high-speed stream
(-CH HSS). Solar wind speeds ranged between 410-520 km/s. The total
magnetic field (Bt) remained around 5 nT, with the Bz component showing
only minor and brief southward deflections to -5 nT.
.Forecast...
The solar wind environment is expected to continue its gradual return
toward a nominal, slow-speed regime through 28 Mar. By late on 29 Mar, a
transition is anticipated as a corotating interaction region (CIR)
precedes the onset of a positive polarity coronal hole high-speed stream
(+CH HSS) with anticipated enhancements in speed and magnetic field
strength.
Geospace
.24 hr Summary...
The geomagnetic field was at quiet to unsettled levels throughout the
period.
.Forecast...
The geomagnetic field is expected to remain at primarily unsettled
levels on 27 Mar as residual HSS influences subside. Mostly quiet
conditions are forecast for 28 Mar. On 29 Mar, activity is expected to
increase to unsettled levels, with a chance for isolated active periods,
due to the anticipated arrival of a CIR and subsequent +CH HSS.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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