Tornado Watch 516

Issued

Jun 19, 2011, 6:51 PM CDT (23:51 UTC)

Expired

Jun 20, 2011, 2:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

4 in

Strongest gust expected

70 kt

The Topeka radar (KTWX), 126 km from the middle of the area, began a volume at 23:52 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

30%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1299Jun 19, 3:52 PM CDT
• Mesoscale Discussion 1305Jun 19, 6:21 PM CDT
• Mesoscale Discussion 1308Jun 19, 9:16 PM CDT
• Mesoscale Discussion 1310Jun 20, 1:40 AM CDT

872 
WWUS20 KWNS 192359
SEL6
SPC WW 192359
IAZ000-KSZ000-MOZ000-NEZ000-200700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 516
NWS STORM PREDICTION CENTER NORMAN OK
655 PM CDT SUN JUN 19 2011

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

       SOUTHERN IOWA
       NORTHEAST KANSAS
       NORTHWEST AND NORTH CENTRAL MISSOURI
       SOUTHEAST NEBRASKA

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

TORNADOES...HAIL TO 4 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 125 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES EAST NORTHEAST OF
SHENANDOAH IOWA TO 25 MILES SOUTH SOUTHEAST OF TOPEKA KANSAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

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 511...WW 513...WW
514...WW 515...

DISCUSSION...TSTM RECENTLY FORMED NEAR INTERSECTION OF DRY LINE AND
WARM FRONTAL SEGMENT E OF SLN MAY CONTINUE TO STRENGTHEN AS
LLJ/MOIST INFLOW INCREASE LATER THIS EVE.  OTHER WDLY SCTD STORMS
MAY FORM EWD ALONG THE SAME FRONT...OR N OF THE FRONT...EWD INTO NRN
MO...LATER THIS EVE.  WHILE CINH ASSOCIATED WITH NERN FRINGE OF
STRONG EML CAP MAY LIMIT OVERALL COVERAGE...THOSE STORMS THAT DO
MANAGE TO BECOME SUSTAINED SHOULD QUICKLY BECOME SUPERCELLS GIVEN
REGIONAL THERMODYNAMIC ENVIRONMENT /VERY STEEP MID LVL LAPSE RATES
ATOP FAIRLY DEEP AND VERY MOIST BOUNDARY LAYER/.  BACKED LOW LVL
FLOW INVOF WARM FRONT...AND MAINTENANCE OF BACKED NEAR-SFC FLOW INTO
TONIGHT AS LEE LOW CONTINUES TO DEEPEN IN WRN KS...FURTHER SUGGEST A
THREAT FOR TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
600. MEAN STORM MOTION VECTOR 22030.


...CORFIDI

Tornado Watches in Iowa, 2011Tornado 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.