Tornado Watch 325

Issued

May 22, 2011, 1:27 PM CDT (18:27 UTC)

Expired

May 22, 2011, 9:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

4 in

Strongest gust expected

60 kt

The Springfield radar (KSGF), 57 km from the middle of the area, began a volume at 18:27 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

70%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

80%

One or more hailstones of 2 inches or more

90%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 849May 22, 10:53 AM CDT
• Mesoscale Discussion 853May 22, 1:06 PM CDT
• Mesoscale Discussion 861May 22, 3:47 PM CDT
• Mesoscale Discussion 862May 22, 3:48 PM CDT
• Mesoscale Discussion 865May 22, 5:21 PM CDT
• Mesoscale Discussion 867May 22, 6:10 PM CDT
• Mesoscale Discussion 869May 22, 6:34 PM CDT
• Mesoscale Discussion 874May 22, 7:52 PM CDT
• Mesoscale Discussion 876May 22, 8:10 PM CDT

682 
WWUS20 KWNS 221831
SEL5
SPC WW 221831
ARZ000-KSZ000-MOZ000-OKZ000-230200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 325
NWS STORM PREDICTION CENTER NORMAN OK
130 PM CDT SUN MAY 22 2011

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

       NORTHWEST ARKANSAS
       SOUTHEAST KANSAS
       SOUTHWEST AND CENTRAL MISSOURI
       EASTERN OKLAHOMA

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 130 PM UNTIL 900
PM CDT.

TORNADOES...HAIL TO 4 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 30 MILES WEST NORTHWEST OF
JEFFERSON CITY MISSOURI TO 30 MILES SOUTH OF MUSKOGEE OKLAHOMA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 321...WW 322...WW
323...WW 324...

DISCUSSION...EXPLOSIVE TSTM DEVELOPMENT IS EXPECTED WITHIN THE NEXT
ONE TO TWO HOURS ALONG COLD FRONT MOVING THROUGH SERN KS AND NERN
OK.  WARM SECTOR AIR MASS IS QUITE MOIST WITH DEWPOINTS IN THE LOWER
70S.  WHEN COUPLED WITH STEEP MIDLEVEL LAPSE RATES...ENVIRONMENT HAS
BECOME STRONGLY TO EXTREMELY UNSTABLE WITH MLCAPE OF 3000-5000 J/KG.
THE PRESENCE OF 35-40 KT WLY DEEP-LAYER SHEAR WILL BE SUPPORTIVE OF
SUPERCELLS CAPABLE OF DESTRUCTIVE HAIL.  MOREOVER...SWRN EXTENSION
OF A 30-35 KT SWLY LLJ WILL BE MAINTAINED ACROSS THE
REGION...RESULTING IN EFFECTIVE SRH VALUES OF 150-250 M2/S2 AND AN
ASSOCIATED TORNADO THREAT.  A STRONG TORNADO OR TWO IS POSSIBLE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
600. MEAN STORM MOTION VECTOR 27025.


...MEAD

Tornado Watches in Missouri, 2011Tornado Watches in Oklahoma, 2011Tornado Watches in Kansas, 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.