RSS Mesoscale Discussions from Storm Prediction Center
No watches are valid as of Tue Mar 3 22:19:02 UTC 2026.
No Mesoscale Discussions are in effect as of Tue Mar 3 22:19:02 UTC 2026.
SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook CORR 1
NWS Storm Prediction Center Norman OK
0232 PM CST Tue Mar 03 2026
Valid 032000Z - 041200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS THE
SOUTHERN/CENTRAL PLAINS INTO MISSOURI AND WESTERN ILLINOIS...
CORRECTED FOR TESTING THE CORRECTION PROCESS
...SUMMARY...
Isolated severe hail may occur this evening into the overnight hours
across parts of the southern/central Plains into Missouri and
western Illinois.
...20z Update...
The Marginal Risk continues across parts of the southern/central
Plains into Missouri and western Illinois. Moisture continues
northward, observed in visible satellite and 60 F dew points
increasing from the south into southern Kansas. Thunderstorm
development is still expected to be delayed into the evening as
modest capping remains in place. Some conditional risk for large
hail (some up to 1.5-2" in diameter) will be possible, mainly across
northwest Oklahoma into southern Kansas. In this region, a favorable
overlap of MLCAPE around 1000-1500 J/kg will overlap with steep
mid-level lapse rates and deep layer shear near the frontal
boundary.
..Thornton.. 03/03/2026
.PREV DISCUSSION... /ISSUED 1030 AM CST Tue Mar 03 2026/
...Southern/Central Plains into Missouri and Western Illinois...
Water-vapor imagery this morning shows a mid-level shortwave trough
over the central Rockies and this feature will move into the central
High Plains late tonight. A frontal zone this morning is draped
from near the Raton Mesa into the TX Panhandle extends
east-northeastward across northern OK into the Ozarks. A weak
surface low over northeast NM and the OK/TX Panhandles this morning
will gradually develop towards northwest TX by this evening.
Southerly low-level flow will maintain a moist fetch into OK today
and into the Ozarks and parts of the mid MS Valley. A dryline is
forecast to mix eastward across the southern High Plains by late
this afternoon, intersecting the surface front in the northwest
TX/southwest OK vicinity.
Convection will likely be inhibited during the day across much of
the MRGL Risk owing to both capping and weak mid-level shortwave
ridging. The strongest heating and low-level convergence is
forecast across parts of northwest TX/southwest OK where convective
inhibition will become weakened by late afternoon. Have adjusted
severe hail probabilities farther south into parts of northwest TX
to account for the potential for a supercell or two this evening
into the overnight hours. As large-scale forcing for ascent
continues to strengthen through the evening into the overnight,
expected widely scattered thunderstorms to eventually develop near
the frontal zone (perhaps favoring a northwest OK/southern KS
corridor). Large hail will be the hazard with the stronger storms.
Around 1000-1500 J/kg of MUCAPE, steepened mid-level lapse rates,
and strong effective bulk shear suggest that some of these cells may
pose a threat for isolated severe hail as they spread from OK/KS
into MO and western IL through early Wednesday morning.
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SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1126 AM CST Tue Mar 03 2026
Valid 041200Z - 051200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM NORTH TEXAS
TO THE SOUTHERN MISSOURI AND ILLINOIS...
...SUMMARY...
Isolated to scattered severe thunderstorms are expected during the
afternoon and evening on Wednesday from north-central Texas and
southeast Oklahoma into northwest Arkansas, southeast Missouri and
southern Illinois. Large hail and occasional wind damage will be
the primary threats.
...Southern Plains to lower OH Valley...
A midlevel shortwave trough now over CO will progress eastward and
reach the mid MS Valley by early Thursday, in response to an
amplifying wave upstream over the Great Basin/CA. An associated
weak surface wave will develop east-northeastward along a
quasi-stationary baroclinic from the Ozarks to the lower OH Valley,
and this baroclinic zone will serve as the primary focus for ascent
and convection Wednesday into early Thursday. Boundary-layer
dewpoints in the 60s will be prevalent along and south of the front
by tomorrow, given the returning moisture already present from
southeast OK into MS. The low-level moistening will occur beneath
the eastern extent of an elevated mixed layer with 7-8 C/km midlevel
lapse rates, per 12z soundings across the southern Plains. Surface
heating in cloud breaks will contribute to MLCAPE near 1000 J/kg
with diminishing convective inhibition along the front through the
afternoon.
Elevated convection could be ongoing at the start of the period
across southeast KS/northeast OK in a zone of low-level warm
advection. Storms will spread east-northeastward through the day
toward southeast MO/southern IL and vicinity, while additional
storms are probable along the front during the afternoon/evening
from central/north TX into eastern OK/western AR. Deep-layer and
low-level vertical shear will be sufficient for storm clusters and
some supercell structures by late afternoon/evening closer to the
path of the weak cyclone and midlevel trough across southern MO,
where there will be the potential for large hail, damaging gusts,
and a couple of tornadoes. Deep-layer shear will be weaker farther
to the southwest toward TX where storms should be more
isolated/discrete with an accompanying threat for large hail.
Convection may persist through the overnight hours to the immediate
cool side of the front.
..Thompson.. 03/03/2026
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SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0127 PM CST Tue Mar 03 2026
Valid 051200Z - 061200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THURSDAY AFTERNOON
INTO THURSDAY NIGHT FROM WEST TEXAS INTO SOUTHWEST/CENTRAL KANSAS...
...SUMMARY...
Scattered severe thunderstorms are expected Thursday afternoon and
into Thursday night from west Texas into Kansas. Large hail appears
to be the main threat, though a couple of tornadoes and isolated
severe gusts will also be possible.
...Southern/central Plains Thursday afternoon/night...
Amplification of a midlevel trough is expected near the Four Corners
Thursday into Thursday night, as a downstream lee cyclone deepens
across eastern CO. The deepening cyclone will draw moisture
northward from TX across the southern/central Plains through early
Friday in the developing warm sector. The lee trough/dryline will
be located near or just west of the KS/CO and TX/NM borders by late
afternoon as the cyclone deepens in place. Surface heating in cloud
breaks could allow sufficient vertical mixing to weaken convective
inhibition and allow isolated thunderstorm development along and
just east of the dryline by late afternoon across the TX
Panhandle/South Plains into southwest KS. The storm environment
will conditionally favor supercells capable of producing large hail
near or just in excess of 2 inches in diameter. The tornado threat
will be a little greater by early evening as low-level shear
increases and near 60 F dewpoints surge northward from OK into KS,
though the tornado threat will depend on a supercell or two
persisting into late evening.
Otherwise, elevated convection will spread northeastward Thursday
night as the low-level jet and associated warm/moist advection
increase. Steep midlevel lapse rates will support the potential for
large hail with the overnight convection as far north as NE/IA.
..Thompson.. 03/03/2026
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SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1240 PM CST Tue Mar 03 2026
Valid 041200Z - 051200Z
...NO CRITICAL AREAS...
The forecast remains on track, and please see the previous
discussion for more details.
..Nauslar/Stearns.. 03/03/2026
.PREV DISCUSSION... /ISSUED 0200 AM CST Tue Mar 03 2026/
...Synopsis...
A mid-level shortwave trough will eject northeastward across the
central Great Plains through D2/Wednesday as a more amplified
upper-level trough digs southeastward into the West. At the surface,
a weak cyclone will transition northeastward across the Midwest
along a nearly stationary boundary forecast to extend from far west
Texas northeastward into the Midwest and then eastward across the
Mid-Atlantic. Cooler temperatures, light winds, and modestly
increased RH within the post-frontal air mass are expected to temper
any fire weather concerns across much of the central and southern
High Plains. While a corridor of stronger sustained surface winds
(15-20 mph) is forecast ahead of the surface low from southern Texas
into the mid-Mississippi River Valley, richer low-level moisture
will maintain surface RH above 40-50% across region.
Meanwhile, a second surface cyclone will shift southeastward from
Alberta into southeastern Montana and may bring a brief period of
localized downslope winds to portions of the northern High Plains;
however, sustained winds are forecast to remain light (less than 15
mph) across any areas that do see decreased RH values of 20% or
less. Given the expected poor overlap of low RH and stronger
sustained winds, widespread fire weather concerns are not
anticipated at this time.
...Please see www.spc.noaa.gov/fire for graphic product...
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SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0341 PM CST Tue Mar 03 2026
Valid 051200Z - 111200Z
An upper-level trough will track southeast and deepen over the
Intermountain West Day 3/Thursday with an associated surface cyclone
developing on the central High Plains. The flow aloft is likely to
split with an upper-level trough tracking northeast across the
central Plains into the Great Lakes Day 4/Friday - Day 5/Saturday
and another upper low likely retrograding southwest over Baja
California by Day 5/Saturday. Forecast uncertainty increases late in
the period regarding the large-scale pattern, especially the
evolution of the cutoff low over northwest Mexico/southwest US.
...Day 3/Thursday - Day 4/Friday: southern/central High Plains...
Southwest flow will increase on Day 3/Thursday behind a sharpening
dryline on the southern/central High Plains. Southwest sustained
surface winds of 15-30 mph gusting 25-50 mph amid minimum RH of
5-20% are expected across much of New Mexico, southeast Colorado,
far west Texas, the Oklahoma Panhandle, and southwest Kansas.
Probabilities of critical conditions are highest across eastern New
Mexico into southeast Colorado. The eastern extent of
elevated/critical fire weather conditions will depend on the dryline
location, while the western extent will be limited due to less
receptive fuels. Forecast precipitation on Day 1/Tuesday night is
expected to limit elevated/critical fire weather conditions
along/east of the Front Range and Sangre de Cristos for Day
3/Thursday, but this will be monitored in subsequent outlooks. High
clouds are also likely to overspread portions of the 40/70% risk
areas, which may help mitigate fire weather conditions.
The dryline will be a focus for Day 3/Thursday late afternoon and
evening thunderstorm development, with the potential for a narrow
corridor of dry thunderstorms from the Caprock into the
Texas/Oklahoma Panhandles and southwest Kansas. However, the
potential for upscale convective growth, a high PWAT/dewpoint
airmass adjacent to the dryline, and dryline placement/movement are
all sources of forecast uncertainty regarding an isolated dry
thunderstorm risk area.
On Day 4/Friday, the dryline will mix farther east with an
approaching cold front pushing southeast across the central Plains.
Between the dryline and cold front, another round of elevated to
critical fire weather conditions are expected, but the probability
of critical conditions are closer to 50%, thus precluding a 70% area
at this time. The northern/eastern portions of the 40% area are the
most uncertain due the previous day/night's (i.e., Day 3/Thursday)
rainfall, how far east the dryline will move, and the progression of
the approaching cold front.
..Nauslar/Stearns.. 03/03/2026
...Please see www.spc.noaa.gov/fire for graphic product...
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