RSS Mesoscale Discussions from Storm Prediction Center
WW 74 SEVERE TSTM IL IN KY 222215Z - 230500Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 74
NWS Storm Prediction Center Norman OK
615 PM EDT Sun Mar 22 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southern Illinois
Central and Southern Indiana
Northern Kentucky
* Effective this Sunday night and Monday morning from 615 PM
until 100 AM EDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Strong to severe thunderstorms are expected to develop
this evening near/just north of a southeast-moving front, with
unseasonably steep lapse rates and strong deep-layer winds being
supportive of severe storms capable of large hail and damaging
winds.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 20 miles west of Mount
Vernon IL to 55 miles south of Muncie IN. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 72...WW 73...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
30025.
...Guyer
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WW 73 SEVERE TSTM IN KY OH 222140Z - 230400Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 73
NWS Storm Prediction Center Norman OK
540 PM EDT Sun Mar 22 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southeast Indiana
Far Northern Kentucky
Ohio
* Effective this Sunday afternoon from 540 PM until Midnight EDT.
* Primary threats include...
Scattered large hail likely with isolated very large hail events
to 2 inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Scattered strong to severe storms will likely continue to
develop near the front, with additional development expected farther
north this evening along/north of the front, with large hail and
damaging winds possible.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 50 miles west southwest
of Dayton OH to 15 miles east northeast of Zanesville OH. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU3).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 72...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28025.
...Guyer
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WW 72 SEVERE TSTM MD OH PA WV 221940Z - 230200Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 72
NWS Storm Prediction Center Norman OK
340 PM EDT Sun Mar 22 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western Maryland
Far Eastern Ohio
Western and Central Pennsylvania
Northern West Virginia
* Effective this Sunday afternoon and evening from 340 PM until
1000 PM EDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter likely
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
A tornado or two possible
SUMMARY...Thunderstorm coverage is expected to increase this
afternoon in the vicinity of a cold front moving southeastward
across the area. Environmental conditions favor initially discrete
storms, with some supercells possible. Large to isolated very large
hail is the primary risk with any supercells. A trend towards a more
linear mode is anticipated with time, with the primary hazard
transitioning to strong gusts. A tornado or two is also possible,
but limited low-level moisture and high LCLs should keep the overall
tornado probability low.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 40 miles west of
Wheeling WV to 35 miles east northeast of Harrisburg PA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU2).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28035.
...Mosier
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WW 0074 Status Updates
STATUS REPORT ON WW 74
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 WSW EVV
TO 40 ENE SLO TO 20 S MIE.
..GRAMS..03/23/26
ATTN...WFO...ILX...PAH...IND...LMK...
STATUS REPORT FOR WS 74
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC047-059-101-185-191-193-230340-
IL
. ILLINOIS COUNTIES INCLUDED ARE
EDWARDS GALLATIN LAWRENCE
WABASH WAYNE WHITE
INC005-013-019-025-027-031-037-043-051-055-061-071-077-079-081-
083-093-101-105-117-119-123-125-129-139-143-145-147-153-163-173-
175-230340-
IN
. INDIANA COUNTIES INCLUDED ARE
BARTHOLOMEW BROWN CLARK
CRAWFORD DAVIESS DECATUR
DUBOIS FLOYD GIBSON
GREENE HARRISON JACKSON
JEFFERSON JENNINGS JOHNSON
KNOX LAWRENCE MARTIN
MONROE ORANGE OWEN
PERRY PIKE POSEY
RUSH SCOTT SHELBY
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WW 0073 Status Updates
STATUS REPORT ON WW 73
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 ENE MIE
TO 20 SW CAK.
..GRAMS..03/23/26
ATTN...WFO...ILN...CLE...RLX...
STATUS REPORT FOR WS 73
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC029-041-047-115-137-155-161-177-230240-
IN
. INDIANA COUNTIES INCLUDED ARE
DEARBORN FAYETTE FRANKLIN
OHIO RIPLEY SWITZERLAND
UNION WAYNE
KYC015-037-117-230240-
KY
. KENTUCKY COUNTIES INCLUDED ARE
BOONE CAMPBELL KENTON
OHC001-009-015-017-021-023-025-027-037-041-045-047-049-057-061-
071-073-075-079-083-089-091-097-099-101-105-109-113-115-117-127-
129-131-135-139-141-145-149-151-159-163-165-167-169-230240-
OH
. OHIO COUNTIES INCLUDED ARE
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WW 0072 Status Updates
STATUS REPORT ON WW 72
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0288
..WENDT..03/23/26
ATTN...WFO...LWX...PBZ...CTP...
STATUS REPORT FOR WS 72
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MDC001-023-230240-
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY GARRETT
OHC013-019-029-031-059-067-081-111-119-121-157-230240-
OH
. OHIO COUNTIES INCLUDED ARE
BELMONT CARROLL COLUMBIANA
COSHOCTON GUERNSEY HARRISON
JEFFERSON MONROE MUSKINGUM
NOBLE TUSCARAWAS
PAC003-005-007-009-013-019-021-027-033-035-041-043-051-055-057-
059-061-063-067-073-087-093-097-099-109-111-119-125-129-
230240-
PA
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No Mesoscale Discussions are in effect as of Mon Mar 23 02:32:04 UTC 2026.
SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0752 PM CDT Sun Mar 22 2026
Valid 230100Z - 231200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF
THE OHIO VALLEY INTO THE NORTHERN MID ATLANTIC...
...SUMMARY...
Scattered severe thunderstorms should continue this evening across
parts of the Ohio Valley into the Mid-Atlantic. Large to very large
hail should be the main threat, although an isolated strong wind
gust remains possible.
... 01Z Update ...
Showers and thunderstorms continue across the Ohio Valley into the
northern Mid-Atlantic. These storms are being aided by increasing
large-scale ascent associated with a gradually amplifying midlevel
trough and vertical circulations associated with a
south-southeastward moving cold front. The anafrontal nature of the
cold front is supporting thunderstorm development/intensification on
the cold side of the boundary, where surface temperatures quickly
fall into the 40Fs.
Most unstable CAPE between 500-1500 J/kg, steep midlevel lapse rates
ranging from 6 C/km across Pennsylvania to 8.5 C/km across southern
Indiana, and strong cloud-layer shear will support a continued hail
threat into the evening hours. The overall wind potential has
diminished across most of the area as low-levels stabilize. However,
given increasing storm coverage an isolated strong-to-severe wind
report may still be possible. The most likely area for this is
across far southeast Illinois into southwest Indiana where better
midlevel lapse rates and greatest storm coverage coincide.
For additional information please see Mesoscale Discussion #287.
..Marsh.. 03/23/2026
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