SPC Nov 4, 2026 2000 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 2000Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0144 PM CST Wed Nov 04 2026

Valid 042000Z - 051200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
AND EVENING OVER PARTS OF THE SOUTHEAST STATES...

...SUMMARY...
Thunderstorms with isolated severe wind gusts and a tornado or two
will be possible across parts of the Southeast.

...20z Update...
Only minor adjustments were made to the Marginal Risk area to clear
behind the ongoing convection. See MCD#2444 and the previous
discussion below for more details.

..Halbert-E.. 11/04/2026

.PREV DISCUSSION... /ISSUED 1015 AM CST Wed Nov 04 2026/

...Southeast...
Moderately strong cyclonic flow aloft is present over the southeast
states today, with water vapor imagery showing a pronounced
shortwave trough over MS/AL. As this trough translates eastward
today, scattered thunderstorms will affect parts of AL/GA/SC and
east TN. Two regimes appear to pose a risk of isolated
strong/severe storms later today.

The first area is along the primary cold front over eastern AL and
western GA. Most recent CAM solutions suggest scattered
thunderstorms will develop along the front by mid-afternoon, with at
least pockets of heating occurring out ahead. A few supercells are
possible. Forecast soundings show weakening low-level winds and
some veering in areas of better heating. This may tend to reduce
the tornado risk, but the strongest cells could be capable of
locally damaging wind gusts.

Another area of concern will stretch from central/northeast GA into
upstate SC later today. Low-level winds will remain backed and
moderately strong in this area, leading to favorable shear profiles
for a tornado or two in the more persistent storms.


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SPC Nov 4, 2026 1300 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1300Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0657 AM CST Wed Nov 04 2026

Valid 041300Z - 051200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ...

...SUMMARY...
Thunderstorms with isolated severe wind gusts and perhaps a brief
tornado will be possible across parts of the Southeast into the
southern Appalachians.

...Synopsis...
Early-morning satellite imagery shows a mature cyclone centered over
the western MN/IA border vicinity. A shortwave trough is moving over
the Ozarks within the base of this cyclone. This shortwave is
forecast to pivot quickly northeastward then northward through the
OH Valley and Upper Great Lakes. Another, lower amplitude shortwave
trough is currently progressing eastward through the Lower MS
Valley, with continued eastward/east-northeastward progress
anticipated today.

Recent surface analysis places the surface low associated with the
Upper Midwest cyclone over far northwest WI, with a cold front
arcing southeastward into far northeast IL then southward to another
low over far eastern LA. A moist airmass precedes this cold front,
with mid 60s dewpoints extending through western KY and low 60s
dewpoints as far north as eastern WI. Thunderstorms are expected
along and ahead of this front as it moves eastward, with the highest
thunderstorm coverage from central/eastern KY across middle/eastern
TN into northern AL and GA.

...Northern AL/Middle TN into the southern Appalachians...
Showers and isolated thunderstorms are currently ongoing within the
moist and broadly confluence warm sector from MS/AL northward into
IL/OH. Showers and thunderstorms will likely continue within this
region of confluent while also developing along the front. Buoyancy
will be tempered by widespread cloud cover and poor lapse rates, but
ample low-level moisture will still support MLCAPE around 1000 J/kg.
Moderate vertical shear will be in place as well, with much of this
shear confined below 700 mb.

Given the moderate to strong low-level shear, this modified tropical
airmass appears supportive of a low-probability tornado risk with
thunderstorms along the cold front and within the prefrontal
confluence zone. Primary limiting factor will be the confined
updraft duration and strength resulting from poor lapse rates and
associated low buoyancy. Even with this limiting factor, a few
storms could briefly achieve the depth and duration need to produce
a brief tornado, particularly from northeast AL across northern GA
where stronger southeasterly surface wind are possible. A few
convectively aided damaging gusts could occur across the region as
well.

..Mosier/Moore.. 11/04/2026


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SPC Nov 4, 2026 0600 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1134 PM CST Tue Nov 03 2026

Valid 041200Z - 051200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE SOUTHEAST AND SOUTHERN APPALACHIANS...

...SUMMARY...
Thunderstorms with isolated severe wind gusts and perhaps a brief
tornado will be possible across parts of the Southeast into the
southern Appalachians.

...Southeast/Southern Appalachians...
An upper-level trough will move eastward from the Ozarks into the
lower Ohio and Tennessee Valleys today. Ahead of the trough, a warm
front will move northward from the central Gulf Coast states into
the southern Appalachians. Near the front, a cluster of strong
storms is expected to develop in the morning from northeast Alabama
into northwest Georgia. As the front moves eastward, a persistent
confluence band is expected to setup from central Georgia northward
into the southern Appalachians. Although abundant cloud cover will
temper surface heating, RAP forecast soundings suggest that MLCAPE
will peak in the 1000 to 1500 J/kg near the confluence band during
the afternoon. This, combined with 0-6 km shear near 40 knots and
0-3 km storm-relative helicity around 200 m2/s2 could be enough for
isolated severe gusts and/or a brief tornado. The threat is expected
to decrease by early evening.

..Broyles/Weinman.. 11/04/2026


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SPC Nov 4, 2026 0100 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 0100Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0637 PM CST Tue Nov 03 2026

Valid 040100Z - 041200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE LOWER TO MID MISSISSIPPI VALLEY...

...SUMMARY...
Thunderstorms with potential for isolated severe wind gusts and
perhaps a brief tornado will be possible this evening and tonight
across the lower to mid Mississippi Valley.

...Lower to Mid Mississippi Valley...
The latest water vapor imagery shows an upper-level low in the mid
Missouri Valley with a trough extending southward into the eastern
part of the southern Plains. Cyclonic mid-level southwesterly flow
is located ahead of the trough in the lower to mid Mississippi
Valley. Within this flow, a broad band of precipitation is ongoing
from central Illinois southward to Louisiana. Scattered
thunderstorms are occurring on the southern end of the band. Ahead
of this band, instability is generally weak except in the lower
Mississippi Valley, where surface dewpoints in the 70s F are
contributing to moderate instability. Although moderate deep-layer
shear is present across much of the lower to mid Mississippi Valley,
low-level lapse rates are very poor. In spite of this, strong
low-level shear coupled with the instability could be enough for an
isolated potential for severe wind gusts and perhaps a tornado.
However, any severe threat will remain marginal this evening and
tonight.

..Broyles.. 11/04/2026


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