July 10
Severe Thunderstorm Watch #679
As of 3:30pm this watch DOES NOT include the Coachella Valley.
source: NOAA
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URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 679
NWS STORM PREDICTION CENTER NORMAN OK
250 PM PDT THU JUL 10 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
A LARGE PART OF WESTERN ARIZONA
PARTS OF SOUTHEASTERN CALIFORNIA
SMALL PART OF SOUTHERN NEVADA
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 250 PM UNTIL
1000 PM PDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH
NORTHWEST OF KINGMAN ARIZONA TO 40 MILES EAST OF YUMA ARIZONA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 676...WW 677...WW 678...
DISCUSSION...SUBSTANTIAL INCREASE IN LOW LEVEL MOISTURE/INSTABILITY
HAS SPREAD NWD INTO EXTREME SRN NV FROM THE G OF C. THUNDERSTORMS
OVER HIGHER TERRAIN OF NWRN AZ WILL PROPAGATE W/SW INTO DESERT
VALLEYS WITH AN INCREASING THREAT OF DAMAGING WINDS.
AVIATION...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 550. MEAN STORM
MOTION VECTOR 07020.
...HALES
