Tornado Watch 271

Issued

May 1, 2006, 5:17 PM CDT (22:17 UTC)

Expired

May 2, 2006, 12:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Springfield radar (KSGF), 65 km from the middle of the area, began a volume at 22:17 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 708May 1, 2:22 PM CDT
• Mesoscale Discussion 709May 1, 4:17 PM CDT
• Mesoscale Discussion 710May 1, 6:59 PM CDT
• Mesoscale Discussion 712May 1, 8:05 PM CDT
• Mesoscale Discussion 713May 1, 10:12 PM CDT

000 
WWUS20 KWNS 012219
SEL1  
SPC WW 012219
ARZ000-ILZ000-MOZ000-OKZ000-020500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 271
NWS STORM PREDICTION CENTER NORMAN OK
520 PM CDT MON MAY 1 2006

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

       NORTHWEST AND NORTH CENTRAL ARKANSAS
       WESTERN ILLINOIS
       SOUTHERN AND EAST CENTRAL MISSOURI
       NORTHEAST AND EAST CENTRAL OKLAHOMA

EFFECTIVE THIS MONDAY AFTERNOON FROM 520 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 2.5 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 NORTH AND SOUTH OF A LINE FROM 50 MILES NORTHWEST OF POTEAU
OKLAHOMA TO 35 MILES NORTH OF CARBONDALE ILLINOIS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).

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 270...

DISCUSSION...SEVERE THUNDERSTORMS INCLUDING SUPERCELLS WILL CONTINUE
TO INCREASE AND SPREAD ENEWD ACROSS WW THIS EVENING.  PRIMARY SEVERE
THREATS WILL BE FROM LARGE HAIL AND DAMAGING WINDS.  HOWEVER...LOW
LEVEL SHEAR WILL BECOME INCREASINGLY FAVORABLE FOR
TORNADOES...ESPECIALLY INTO S-CENTRAL/SERN MO AND IL PORTIONS OF WW.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 26035.


...EVANS

Tornado Watches in Missouri, 2006Tornado Watches in Illinois, 2006Tornado Watches in Arkansas, 2006Every tornado watch in 2006

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.