Tornado Watch 560

Issued

Jun 26, 2011, 6:55 PM CDT (23:55 UTC)

Expired

Jun 27, 2011, 2:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

70 kt

The Pleasant Hill radar (KEAX), 114 km from the middle of the area, began a volume at 23:55 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

70%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

90%

One or more hailstones of 2 inches or more

70%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1403Jun 26, 3:09 PM CDT
• Mesoscale Discussion 1406Jun 26, 6:22 PM CDT
• Mesoscale Discussion 1410Jun 26, 9:25 PM CDT
• Mesoscale Discussion 1411Jun 26, 10:06 PM CDT
• Mesoscale Discussion 1413Jun 27, 12:58 AM CDT

032 
WWUS20 KWNS 262358
SEL0
SPC WW 262358
KSZ000-MOZ000-270700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 560
NWS STORM PREDICTION CENTER NORMAN OK
655 PM CDT SUN JUN 26 2011

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

       EXTREME NORTHEAST KANSAS
       NORTHWEST INTO EAST CENTRAL MISSOURI

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 655 PM UNTIL
200 AM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHWEST OF SAINT
JOSEPH MISSOURI TO 75 MILES EAST OF JEFFERSON CITY MISSOURI.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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 555...WW 556...WW
557...WW 558...WW 559...

DISCUSSION...THUNDERSTORMS ARE BEGINNING TO DEVELOP ALONG THE
SURFACE WARM FRONT IN NW MO...AND W OF STL WHERE A SMALL OUTFLOW
BOUNDARY INTERSECTS THE FRONT.  A VERY UNSTABLE AIR MASS IS IN PLACE
ALONG AND S OF THE BOUNDARY WHERE MLCAPE IS NEAR 5000 J/KG...AND
EFFECTIVE BULK SHEAR NEAR 50 KT WILL FAVOR SUPERCELLS.
ADDITIONALLY...EFFECTIVE SRH OF 200-400 M2/S2 AND A MOIST BOUNDARY
LAYER WILL BE FAVORABLE FOR TORNADOES WITH ANY DISCRETE STORMS IN
THE NEXT FEW HOURS.  VERY LARGE HAIL WILL ALSO BE POSSIBLE.  LATER
TONIGHT...THE DEVELOPING STORMS COULD EVOLVE INTO ONE OR MORE
CLUSTERS...OR THE BOWING MCS IN ERN NEB COULD DEVELOP SEWD ALONG THE
FRONT...WITH AN ATTENDANT RISK FOR DAMAGING WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
650. MEAN STORM MOTION VECTOR 28025.


...THOMPSON

Tornado Watches in Missouri, 2011Tornado Watches in Kansas, 2011Every tornado watch in 2011

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.