Severe Thunderstorm Warning 77, NWS Las Vegas, NV

000 
WWUS55 KVEF 180454
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
953 PM PDT MON OCT 17 2005

CAC071-180503-
/O.CAN.KVEF.SV.W.0077.000000T0000Z-051018T0515Z/
SAN BERNARDINO CA-
953 PM PDT MON OCT 17 2005

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SAN BERNARDINO COUNTY
IS CANCELLED...

AT 952 PM...DOPPLER RADAR INDICATED THAT THE THUNDERSTORM OVER 
CENTRAL SAN BERNARDINO COUNTY HAD WEAKENED...AND WAS NO LONGER 
SEVERE. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN 
CANCELLED.

LAT...LON 3494 11529 3509 11517 3552 11596 3531 11612

$$

MORGAN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
410 PM PDT MON OCT 17 2005

.SYNOPSIS...A STRONG AREA OF LOW PRESSURE LOCATED OFF THE NORTHERN
BAJA COAST WILL MOVE NORTHEAST ACROSS THE AREA THROUGH TUESDAY
NIGHT. THE SYSTEM WILL BRING MODERATE TO LOCALLY HEAVY RAINFALL
ACROSS MUCH OF THE SOUTHERN FORECAST AREA. SNOW IS NOT EXPECTED TO
BE A PROBLEM WITH SNOW LEVELS REMAINING ABOVE 8000 FEET. DRIER AIR
WILL BEGIN TO SPREAD INTO THE AREA FROM THE WEST LATE TUESDAY NIGHT
AND WEDNESDAY.
&&

.SHORT TERM...WV IMAGERY SHOWS THE LOW PRESSURE SYSTEM CONTINUING TO
ROTATE OFF THE SOUTHERN CALIFORNIA COAST NEAR SAN DIEGO. THE CURRENT
FORECAST FOLLOWS THE GFS AS IT HAS SHOWN THE GREATEST CONSISTENCY
AND APPEARS TO HAVE THE BEST HANDLE ON CURRENT MOISTURE AND PRECIP
TRENDS. THE GFS FORECASTS THE LOW TO MOVE TO THE NORTHEAST BEGINNING
TONIGHT AND CONTINUING THROUGH TUE/TUE NIGHT BECOMING CENTERED NEAR
THE FOUR CORNERS REGION BY WEDNESDAY MORNING. STORM TOTAL QPF
AMOUNTS ARE STILL IMPRESSIVE WITH THE 12Z RUN. WITH THE CENTER OF
THE LOW AND ITS ASSOCIATED COLD POOL TRACKING ACROSS SAN BERNARDINO
CLARK AND MOHAVE COUNTIES OVERNIGHT AND TUESDAY...THINK THAT RAIN
WILL BECOME WIDESPEAD FIRST ACROSS SOUTHERN SAN BERNARDINO THIS
EVENING AND EVENTUALLY SPREAD INTO THE REST OF THE COUNTY AND
EXTREME SOUTHERN NEVADA AND MOHAVE COUNTY AFTER MIDNIGHT AND INTO
TUESDAY MORNING. RAINFALL AMOUNTS OF UP TO AN INCH EXPECTED OVER A
WIDESPREAD AREA WITH LOCALLY HEAVIER AMOUNTS POSSIBLE IN FAVORED
UPSLOPE REGIONS WHERE UPWARDS OF 2 TO 3 INCHES WILL BE POSSIBLE FROM
THIS STORM. IN ADDITION...EMBEDDED CONVECTION COULD ENHANCE RAINFALL
AMOUNTS OVER A SHORT PERIOD OF TIME AND POTENTIALLY CAUSE FLASH
FLOODING ACROSS FLOOD PRONE AREAS. SEE THE LATEST FLASH FLOOD WATCH
STATEMENT THAT HAS BEEN ISSUED FOR SEVERAL AREAS TONIGHT AND TUESDAY.
&&

.LONG TERM...WEAK HIGH PRESSURE EXPECTED OVER THE REGION THURSDAY
THROUGH SUNDAY WITH NEAR NORMAL TEMPERATURES AND DRY CONDITIONS.
BOTH THE DGEX/GFS SHOWING NEXT PACIFIC THROUGH APPROACHING THE AREA
BY LATE SUNDAY AND MONDAY WITH INCREASING SOUTHWEST WINDS AND
OCCASIONAL HIGH LEVEL MOISTURE.

.AVIATION...UPPER LOW WILL STAY SOUTHWEST OF SAN DIEGO TODAY AND
START MOVING NORTHEAST ACROSS SOUTHERN CALIFORNIA TUESDAY. SHOWERS
AND ISOLATED THUNDERSTORMS WILL AFFECT ALL CORRIDORS THROUGH TONIGHT
AS THE UPPER LOW BEGINS TO SHIFT EAST. CEILINGS ARE EXPECTED TO
LOWER THROUGH THIS AFTERNOON TO AROUND 4000 FT AGL AND VISIBILITIES
5SM IN RAIN. THESE CONDITIONS ARE EXPECTED TO REMAIN THROUGH THE
NIGHT.

.VEF WATCHES/WARNINGS/ADVISORIES...
.NV...FLASH FLOOD WATCH FOR ZONES 16 AND 18-22 FROM 2 AM PDT TUESDAY
UNTIL TUESDAY AFTERNOON.
.AZ...FLASH FLOOD WATCH FOR ZONES 2-3 AND 36 FROM 2 AM MDT TUESDAY
UNTIL TUESDAY AFTERNOON..
.CA...FLASH FLOOD WATCH FOR ZONE 28 FROM 5 PM PDT MONDAY UNTIL 3 PM
PDT TUESDAY. FLASH FLOOD WATCH FOR ZONE 29 FROM 2 AM PDT UNTIL
TUESDAY AFTERNOON.
&&

SALMEN/GORELOW

HTTP://WEATHER.GOV/LASVEGAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
557 AM PDT MON OCT 17 2005

AZZ001>003-036-CAZ026>029-NVZ016>022-180700-
NORTHWEST PLATEAU-LAKE HAVASU AND FORT MOHAVE-NORTHWEST DESERTS--
OWENS VALLEY AND ADJACENT EASTERN SIERRA SLOPES-
DEATH VALLEY NATIONAL PARK-SAN BERNARDINO COUNTY DESERTS-
SAN BERNARDINO COUNTY-NORTHEAST CLARK COUNTY-
WESTERN CLARK AND SOUTHERN NYE COUNTY-SHEEP RANGE-
SPRING MOUNTAINS-LAS VEGAS VALLEY-
LAKE MEAD NATIONAL RECREATION AREA-SOUTHERN CLARK COUNTY-
557 AM PDT MON OCT 17 2005 /557 AM MST MON OCT 17 2005/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
ARIZONA...SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA.

.DAY ONE...TODAY AND TONIGHT

WIDESPREAD RAIN AND EMBEDDED THUNDERSTORMS WILL OCCUR TODAY AND
TONIGHT ACROSS SOUTHERN NEVADA...NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA AS A STRONG AREA OF LOW PRESSURE SLOWLY MOVES TOWARD
SAN DIEGO. THE RAIN WILL BE HEAVY AT TIMES. HEAVY RAIN WILL CAUSE
RUNOFF IN WASHES AND STREAMS AS WELL AS POORLY DRAINED
INTERSECTIONS AND LOW-LYING AREAS SUCH AS UNDERPASSES. DEBRIS AND
MUD MAY ALSO BE CARRIED ONTO ROADWAYS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

WIDESPREAD RAIN AND EMBEDDED THUNDERSTORMS WILL CONTINUE THROUGH
TUESDAY AS THE UPPER LOW STARTS TO MOVE EAST ACROSS SOUTHERN
CALIFORNIA. HEAVY RAIN WILL STILL BE POSSIBLE ACROSS SOUTHERN
NEVADA...NORTHWEST ARIZONA AND EASTERN CALIFORNIA. RAIN WILL BEGIN
TO TAPER OFF TUESDAY NIGHT AS THE LOW MOVES TOWARD THE FOUR
CORNERS. WEDNESDAY THROUGH SUNDAY WILL BE DRY WITH TEMPERATURES
NEAR NORMAL.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORTS SIGNIFICANT WEATHER
CONDITIONS.