Tornado Watch 124

Issued

Apr 10, 2011, 7:28 PM CDT (00:28 UTC)

Expired

Apr 11, 2011, 3:00 AM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Springfield radar (KSGF), 79 km from the middle of the area, began a volume at 00:31 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 398Apr 10, 5:03 PM CDT
• Mesoscale Discussion 400Apr 10, 6:17 PM CDT
• Mesoscale Discussion 401Apr 10, 8:52 PM CDT
• Mesoscale Discussion 407Apr 11, 2:04 AM CDT

897 
WWUS20 KWNS 110033
SEL4
SPC WW 110033
ARZ000-MOZ000-OKZ000-110800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 124
NWS STORM PREDICTION CENTER NORMAN OK
730 PM CDT SUN APR 10 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

       WESTERN AND NORTHERN ARKANSAS
       SOUTHWEST AND SOUTH CENTRAL MISSOURI
       EASTERN AND SOUTHERN OKLAHOMA

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 730 PM UNTIL
300 AM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH OF VICHY
MISSOURI TO 40 MILES EAST SOUTHEAST OF ARDMORE OKLAHOMA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 120...WW 121...WW
122...WW 123...

DISCUSSION...TSTMS EXPECTED TO FORM IN THE NEXT HOUR OR SO ALONG DRY
LINE FROM SW MO SSW INTO S CNTRL OK...AS UVV BEGINS TO INCREASE WITH
APPROACH OF W TX UPR IMPULSE.  AMPLE SHEAR SHOULD PERSIST FOR
SUPERCELLS.  SETUP APPEARS FAVORABLE FOR EVENTUAL EVOLUTION INTO
BROKEN LINE SEGMENTS/LEWPS WITH AN ATTENDANT THREAT FOR POSSIBLE
TORNADOES IN ADDITION TO SVR WIND/HAIL GIVEN 40+ KT 850-700 MB FLOW
BENEATH 70+ KT 500 MB WIND IN ENTRANCE REGION OF DEVELOPING UPR LVL
JET STREAK.

AVIATION...TORNADOES AND 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
550. MEAN STORM MOTION VECTOR 24045.


...CORFIDI

Tornado Watches in Missouri, 2011Tornado Watches in Oklahoma, 2011Tornado Watches in Arkansas, 2011Every tornado watch in 2011

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.