Tornado Watch 224

Issued

May 3, 2007, 6:43 PM MDT (00:43 UTC)

Expired

May 4, 2007, 12:00 AM MDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

Counties Adams County, CO, Arapahoe County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE

The Cheyenne radar (KCYS), 142 km from the middle of the area, began a volume at 00:46 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

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 674May 3, 6:34 PM MDT
• Mesoscale Discussion 677May 3, 8:57 PM MDT

000
WWUS20 KWNS 040044
SEL4  
SPC WW 040044
COZ000-NEZ000-040600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 224
NWS STORM PREDICTION CENTER NORMAN OK
645 PM MDT THU MAY 3 2007

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

       NORTHEAST COLORADO
       THE NEBRASKA PANHANDLE

EFFECTIVE THIS THURSDAY NIGHT FROM 645 PM UNTIL MIDNIGHT MDT.

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 50 STATUTE
MILES EAST AND WEST OF A LINE FROM 10 MILES NORTH OF CHADRON
NEBRASKA TO 40 MILES SOUTH SOUTHEAST OF AKRON COLORADO.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).

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 218...WW 219...WW
220...WW 221...WW 222...WW 223...

DISCUSSION...SMALL MCS WITH EMBEDDED SUSTAINED STORMS/POSSIBLE
SUPERCELLS NOW E/SE OF CYS EXPECTED TO CONTINUE ENEWD THIS
EVENING...WITH ADDITIONAL DEVELOPMENT POSSIBLE ON SRN END AS
UPSTREAM NEG TILT SHORTWAVE TROUGH CONTINUES ENEWD.  MCS WILL SOON
ENCOUNTER LESS DEEPLY MIXED/SLIGHTLY MORE MOIST BOUNDARY LAYER
ENVIRONMENT ACROSS NE CO/THE NEB PANHANDLE...WHERE LOW LEVEL WINDS
WILL REMAIN BACKED TO SELY.  THUS...POTENTIAL WILL EXIST FOR
POSSIBLE TORNADOES IN ADDITION TO BOWING SEGMENTS WITH STRAIGHT LINE
WINDS/HAIL.

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
400. MEAN STORM MOTION VECTOR 21040.


...CORFIDI

Tornado Watches in Nebraska, 2007Tornado 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.