Tornado Watch 513

Issued

Jun 19, 2011, 2:04 PM MDT (20:04 UTC)

Expired

Jun 19, 2011, 9:12 PM MDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

3.5 in

Strongest gust expected

60 kt

The Denver radar (KFTG), 108 km from the middle of the area, began a volume at 20:07 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

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

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1295Jun 19, 1:09 PM MDT
• Mesoscale Discussion 1303Jun 19, 4:58 PM MDT
• Mesoscale Discussion 1307Jun 19, 7:24 PM MDT

952 
WWUS20 KWNS 192006
SEL3
SPC WW 192006
COZ000-NEZ000-200300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 513
NWS STORM PREDICTION CENTER NORMAN OK
305 PM CDT SUN JUN 19 2011

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

       LARGE PART OF NORTHEASTERN COLORADO
       PARTS OF WESTERN NEBRASKA

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 305 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3.5 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES WEST SOUTHWEST OF
LIMON COLORADO TO 75 MILES NORTHEAST OF SIDNEY NEBRASKA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU3).

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 512...

DISCUSSION...AIR MASS CONTINUES TO DESTABILIZE ACROSS HI PLAINS AS
FOR SUPERCELLS. CONVERGENCE VICINITY DEN ONE AREA OF LIKELY
INITIATION SOON WITH ADDITIONAL STORMS DEVELOPING OFF THE HIGHER
TERRAIN.  SUPERCELLS WITH POTENTIAL FOR VERY LARGE HAIL AND A FEW
TORNADOES ARE LIKELY AS  STORMS DEVELOP UPSCALE AND MOVE FURTHER NE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24025.


...HALES

Tornado Watches in Colorado, 2011Tornado Watches in Nebraska, 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.