Tornado Watch 49

Issued

Mar 8, 2009, 10:39 AM CDT (15:39 UTC)

Expired

Mar 8, 2009, 6:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Lincoln radar (KILX), 110 km from the middle of the area, began a volume at 15:38 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

60%

One or more EF2 to EF5 tornadoes

50%

Ten or more severe wind reports

80%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 206Mar 8, 9:26 AM CDT
• Mesoscale Discussion 208Mar 8, 11:35 AM CDT
• Mesoscale Discussion 210Mar 8, 1:31 PM CDT
• Mesoscale Discussion 211Mar 8, 2:20 PM CDT
• Mesoscale Discussion 212Mar 8, 3:14 PM CDT

155 
WWUS20 KWNS 081543
SEL9  
SPC WW 081543
ILZ000-INZ000-KYZ000-MOZ000-082100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 49
NWS STORM PREDICTION CENTER NORMAN OK
1040 AM CDT SUN MAR 8 2009

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

       CENTRAL AND SOUTHERN ILLINOIS
       WESTERN INDIANA
       WESTERN KENTUCKY
       SOUTHEAST MISSOURI

EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 1040 AM UNTIL
400 PM 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 100 STATUTE
MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH NORTHWEST OF
DANVILLE ILLINOIS TO 50 MILES SOUTH SOUTHEAST OF CAPE GIRARDEAU
MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 48...

DISCUSSION...BROKEN LINE OF SUPERCELLS WILL CONTINUE MOVING RAPIDLY
ENEWD ACROSS WW THROUGH THE AFTERNOON AHEAD OF EJECTING SHORTWAVE
TROUGH AND ALONG AXIS OF 90 KT MID LEVEL JET.  LOW LEVEL AIR MASS
WILL CONTINUE TO RECOVER NWD THROUGH THE DAY AS SURFACE LOW MOVES
NEWD TOWARDS NERN IL...LEAVING A BROAD WARM SECTOR CHARACTERIZED BY
MARGINAL INSTABILITY.  ENHANCED WIND FIELDS WILL SUPPORT FAST STORM
MOTIONS AND WIND DAMAGE WITH THESE STORMS...WITH SIGNIFICANT SHEAR
SUSTAINING A RISK OF ISOLATED TORNADOES.  ISOLATED LARGE HAIL WILL
BE ADDITIONAL RISK.

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 24045.


...EVANS

Tornado Watches in Illinois, 2009Tornado Watches in Indiana, 2009Tornado Watches in Kentucky, 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.