Tornado Watch 715

Issued

Oct 17, 2007, 7:09 PM CDT (00:09 UTC)

Expired

Oct 18, 2007, 2:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Memphis radar (KNQA), 137 km from the middle of the area, began a volume at 00:12 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

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

60%

• Mesoscale Discussion 2097Oct 17, 5:15 PM CDT
• Mesoscale Discussion 2101Oct 17, 8:10 PM CDT
• Mesoscale Discussion 2103Oct 17, 10:56 PM CDT
• Mesoscale Discussion 2104Oct 18, 12:27 AM CDT

000
WWUS20 KWNS 180009
SEL5  
SPC WW 180009
ARZ000-LAZ000-MOZ000-MSZ000-180700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 715
NWS STORM PREDICTION CENTER NORMAN OK
710 PM CDT WED OCT 17 2007

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

       EASTERN ARKANSAS
       NORTHEAST LOUISIANA
       MISSOURI BOOTHEEL
       WESTERN AND CENTRAL MISSISSIPPI

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 710 PM
UNTIL 200 AM 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 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
WALNUT RIDGE ARKANSAS TO 55 MILES EAST SOUTHEAST OF NATCHEZ
MISSISSIPPI.  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 711...WW 712...WW
713...WW 714...

DISCUSSION...SCATTERED THUNDERSTORMS ARE LIKELY TO INTENSIFY THIS
EVENING OVER EASTERN AR INTO EASTERN LA AS VIGOROUS UPPER TROUGH
ROTATES EASTWARD ACROSS MS VALLEY.  VERY STRONG WIND FIELDS...LARGE
SCALE FORCING...AND SURFACE DEWPOINTS IN THE 70S WILL PROMOTE A RISK
OF EMBEDDED SUPERCELLS CAPABLE OF DAMAGING WINDS AND TORNADOES.

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 24035.


...HART

Tornado Watches in Mississippi, 2007Tornado Watches in Arkansas, 2007Tornado Watches in Louisiana, 2007Every tornado watch in 2007

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.