Tornado Watch 165

Issued

Apr 23, 2007, 2:10 PM MDT (20:10 UTC)

Expired

Apr 24, 2007, 12:00 AM MDT

In force

10 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

50 kt

The Denver radar (KFTG), 78 km from the middle of the area, began a volume at 20:13 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

20%

One or more gusts of 65 knots or more

5%

Ten or more severe hail reports

90%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 544Apr 23, 1:36 PM MDT
• Mesoscale Discussion 551Apr 23, 6:52 PM MDT

000
WWUS20 KWNS 232011
SEL5  
SPC WW 232011
COZ000-240300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 165
NWS STORM PREDICTION CENTER NORMAN OK
210 PM MDT MON APR 23 2007

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

       EASTERN COLORADO

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 900
PM MDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH NORTHWEST OF
AKRON COLORADO TO 40 MILES WEST SOUTHWEST OF SPRINGFIELD
COLORADO.  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.

DISCUSSION...TSTMS EXPECTED TO DEVELOP OVER THE NEXT HOUR OR SO IN
INCREASINGLY MOIST/UPSLOPE FLOW INVOF DENVER CYCLONE OVER E CNTRL
CO.  OTHER STORMS MAY FORM OVER THE FOOTHILLS AND MOVE/DEVELOP EWD. 
BACKED LOW LEVEL WINDS AND EXPECTED DISCRETE TO SEMI-DISCRETE NATURE
OF STORMS SUGGEST POTENTIAL FOR TORNADOES IN ADDITION TO HAIL.  SOME
OF THE STORMS MAY STRENGTHEN AND CONSOLIDATE INTO A CLUSTER OR TWO
THIS EVENING AS SHEAR/LARGE SCALE ASCENT INCREASE AHEAD OF
EWD-MOVING GRT BASIN UPR LOW.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
400. MEAN STORM MOTION VECTOR 21030.


...CORFIDI

Tornado Watches in Colorado, 2007Every tornado watch in 2007

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.