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The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL2
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 732
NWS STORM PREDICTION CENTER NORMAN OK
410 PM MDT SUN AUG 23 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN ARIZONA
SOUTHEASTERN CALIFORNIA
SOUTHERN NEVADA
EFFECTIVE THIS SUNDAY AFTERNOON FROM 410 PM UNTIL MIDNIGHT MDT.
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 70
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES WEST
NORTHWEST OF SAINT GEORGE UTAH TO 10 MILES SOUTHEAST OF BLYTHE
CALIFORNIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
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.
DISCUSSION...SCTD TSTMS EXPECTED TO CONTINUE FORMING THROUGH THIS
EVE IN ZONE OF HIGH PW DOWNSTREAM FROM TWO-PART UPR IMPULSE NOW
EXTENDING FROM SRN CA SWD INTO NRN BAJA. MODERATE UNIDIRECTIONAL
CLOUD LAYER FLOW WITH STEEP MID LVL LAPSE RATES AND FAIRLY RICH
MOISTURE SUPPLY SUGGESTS POTENTIAL FOR REGENERATIVE/SUSTAINED STORMS
AND POSSIBLY A SUPERCELL OR TWO THAT COULD YIELD SVR HAIL/WIND. THE
CONVECTION COULD ORGANIZE INTO SMALL CLUSTERS/BANDS BY MID EVE.
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 500. MEAN STORM
MOTION VECTOR 23020.
...CORFIDI
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW2
WW 732 SEVERE TSTM AZ CA NV 232210Z - 240600Z
AXIS..70 STATUTE MILES EAST AND WEST OF LINE..
25WNW SGU/SAINT GEORGE UT/ - 10SE BLH/BLYTHE CA/
..AVIATION COORDS.. 60NM E/W /64SSE ILC - 44N BZA/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 23020.
LAT...LON 37201275 33501337 33501580 37201529
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU2.
Watch 732 Status Report Messages:
STATUS REPORT #5 ON WW 732
VALID 240335Z - 240440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 60 SW PRC TO
40 NE TRM.
..KERR..08/24/09
ATTN...WFO...PSR...VEF...
&&
STATUS REPORT FOR WS 732
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
AZC015-240440-
AZ
. ARIZONA COUNTIES INCLUDED ARE
MOHAVE
$$
CAC071-240440-
CA
. CALIFORNIA COUNTIES INCLUDED ARE
SAN BERNARDINO
$$
NVC003-017-240440-
NV
. NEVADA COUNTIES INCLUDED ARE
CLARK LINCOLN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 732
VALID 240235Z - 240340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..08/24/09
ATTN...WFO...PSR...VEF...
&&
STATUS REPORT FOR WS 732
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
AZC012-015-240340-
AZ
. ARIZONA COUNTIES INCLUDED ARE
LA PAZ MOHAVE
$$
CAC071-240340-
CA
. CALIFORNIA COUNTIES INCLUDED ARE
SAN BERNARDINO
$$
NVC003-017-240340-
NV
. NEVADA COUNTIES INCLUDED ARE
CLARK LINCOLN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 732
VALID 240155Z - 240240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1961.
..KERR..08/24/09
ATTN...WFO...PSR...VEF...
&&
STATUS REPORT FOR WS 732
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
AZC012-015-240240-
AZ
. ARIZONA COUNTIES INCLUDED ARE
LA PAZ MOHAVE
$$
CAC071-240240-
CA
. CALIFORNIA COUNTIES INCLUDED ARE
SAN BERNARDINO
$$
NVC003-017-240240-
NV
. NEVADA COUNTIES INCLUDED ARE
CLARK LINCOLN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 732
VALID 240025Z - 240140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..08/24/09
ATTN...WFO...PSR...VEF...
&&
STATUS REPORT FOR WS 732
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
AZC012-015-240140-
AZ
. ARIZONA COUNTIES INCLUDED ARE
LA PAZ MOHAVE
$$
CAC071-240140-
CA
. CALIFORNIA COUNTIES INCLUDED ARE
SAN BERNARDINO
$$
NVC003-017-240140-
NV
. NEVADA COUNTIES INCLUDED ARE
CLARK LINCOLN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 732
VALID 232330Z - 240040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..08/23/09
ATTN...WFO...PSR...VEF...
&&
STATUS REPORT FOR WS 732
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
AZC012-015-240040-
AZ
. ARIZONA COUNTIES INCLUDED ARE
LA PAZ MOHAVE
$$
CAC071-240040-
CA
. CALIFORNIA COUNTIES INCLUDED ARE
SAN BERNARDINO
$$
NVC003-017-240040-
NV
. NEVADA COUNTIES INCLUDED ARE
CLARK LINCOLN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Low (20%)
|
Probability of 1 or more wind events > 65 knots
|
Low (10%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (20%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (50%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
