Tornado Watch 784

Issued

Oct 29, 2009, 5:27 PM CDT (22:27 UTC)

Expired

Oct 29, 2009, 8:48 PM CDT

In force

3 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Little Rock radar (KLZK), 103 km from the middle of the area, began a volume at 22:26 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

30%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 2158Oct 29, 3:03 PM CDT
• Mesoscale Discussion 2163Oct 29, 8:24 PM CDT

599 
WWUS20 KWNS 292228
SEL4  
SPC WW 292228
ARZ000-300500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 784
NWS STORM PREDICTION CENTER NORMAN OK
525 PM CDT THU OCT 29 2009

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

       NORTHERN ARKANSAS

EFFECTIVE THIS THURSDAY AFTERNOON FROM 525 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 1.5 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 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES SOUTHEAST OF
RUSSELLVILLE ARKANSAS TO 20 MILES NORTH NORTHWEST OF FLIPPIN
ARKANSAS.  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 781...WW 782...WW 783...

DISCUSSION...STRONG STORMS CONTINUE TO DEVELOP AND MOVE RAPIDLY
NNEWD ALONG AND AHEAD OF COLD FRONT SHIFTING SLOWLY EWD ACROSS ERN
OK.  SURFACE DEW POINTS ARE EXPECTED TO GRADUALLY SHIFT NWD AS A
WARM FRONT LIFTS INTO NRN AR THIS EVENING...INCREASING THE POTENTIAL
FOR SURFACE-BASED STORMS TO SPREAD INTO NRN AR.  VERTICAL WIND
PROFILES CONTINUE TO EXHIBIT VERY STRONG LOW LEVEL SHEAR WITH 0-1 KM
SRH VALUES AOA 300-400 M2/S2...WITH POTENTIAL FOR TORNADIC
SUPERCELLS TO DEVELOP THROUGH THE EVENING HOURS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 20045.


...WEISS

Tornado Watches in Arkansas, 2009Every tornado watch in 2009

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.