Tornado Watch 5

Issued

Jan 7, 2008, 7:48 PM CST (01:48 UTC)

Expired

Jan 8, 2008, 5:00 AM CST

In force

9 hr

Issued by

the Storm Prediction Center

Particularly dangerous situation

Yes

Largest hail expected

2 in

Strongest gust expected

60 kt

The Springfield radar (KSGF), 55 km from the middle of the area, began a volume at 01:47 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

95%

One or more EF2 to EF5 tornadoes

70%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 16Jan 7, 4:34 PM CST
• Mesoscale Discussion 18Jan 7, 6:11 PM CST
• Mesoscale Discussion 19Jan 7, 6:57 PM CST
• Mesoscale Discussion 22Jan 7, 10:04 PM CST
• Mesoscale Discussion 24Jan 7, 11:18 PM CST
• Mesoscale Discussion 25Jan 8, 2:02 AM CST
• Mesoscale Discussion 26Jan 8, 3:44 AM CST

228 
WWUS20 KWNS 080154
SEL5  
SPC WW 080154
ARZ000-ILZ000-MOZ000-OKZ000-081100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 5
NWS STORM PREDICTION CENTER NORMAN OK
750 PM CST MON JAN 7 2008

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

       WESTERN AND NORTHERN ARKANSAS
       WESTERN ILLINOIS
       SOUTHWEST THROUGH EAST CENTRAL MISSOURI
       NORTHEAST OKLAHOMA

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 750 PM UNTIL
500 AM CST.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE 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 100 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES SOUTHWEST OF FORT
SMITH ARKANSAS TO 30 MILES NORTH OF ALTON ILLINOIS.  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 1...WW 2...WW 3...WW 4...

DISCUSSION...SUPERCELLS EXPECTED TO PERSIST THROUGH EARLY TUESDAY
ALONG PREFRONTAL CONFLUENCE ZONE EXTENDING ROUGHLY ALONG THE I-44
CORRIDOR FROM NE OK INTO E CNTRL MO.  APPROACH OF OK/TX PANHANDLE
UPR VORT AND ASSOCIATED STRENGTHENING LLJ...AND ABSENCE OF STRONG
LOW LEVEL LINEAR FORCING...SHOULD MAINTAIN FAVORABLE ENVIRONMENT FOR
DISCRETE TO SEMI-DISCRETE STORMS.  GIVEN INTENSE DEEP SHEAR OVER
REGION AND SLIGHT BACKING OF NEAR-SFC FLOW ALONG CONFLUENCE
LINE...POTENTIAL WILL EXIST FOR TORNADOES...SOME POSSIBLY STRONG. 
THE GREATEST THREAT SHOULD SPREAD SLOWLY ENE FROM NE OK AND SW/S
CNTRL MO THIS EVENING...AND REACH THE MO/IL BORDER AREA AFTER
MIDNIGHT/EARLY TUESDAY.

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
400. MEAN STORM MOTION VECTOR 25045.


...CORFIDI

Tornado Watches in Missouri, 2008Tornado Watches in Illinois, 2008Tornado Watches in Arkansas, 2008Every tornado watch in 2008

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.