Flash Flood Warning 18, NWS Reno, NV

232 
WGUS75 KREV 032304
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
404 PM PDT SUN OCT 3 2010

NVC027-040045-
/O.CON.KREV.FF.W.0018.000000T0000Z-101004T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PERSHING NV-
404 PM PDT SUN OCT 3 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT FOR NORTH
CENTRAL PERSHING COUNTY...

AT 400 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING HEAVY RAIN AND POSSIBLE FLASH 
FLOODING ALONG THE WEST SLOPES OF THE EAST RANGE OR JUST EAST OF 
THAT SECTION OF I-80 EXTENDING FROM MILL CITY TO THE HUMBOLDT COUNTY 
LINE SOUTHWEST OF WINNEMUCCA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND AND 
RANCHLAND ALONG THE BANKS OF CREEKS AND STREAMS. A FEW OF THE 
STREAMS INCLUDED IN THIS WARNING ARE ROSE CREEK...RASPBERRY CREEK... 
DUN GLEN CREEK AND WILLOW CREEK.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. JUST A FEW INCHES OF FAST 
FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. 
WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN 
AROUND...DONT DROWN.

LAT...LON 4055 11791 4066 11807 4078 11801 4086 11795
      4086 11790 4062 11786

$$

HOHMANN

404 
WGUS75 KREV 040009
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
509 PM PDT SUN OCT 3 2010

NVC027-040045-
/O.CON.KREV.FF.W.0018.000000T0000Z-101004T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PERSHING NV-
509 PM PDT SUN OCT 3 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT FOR NORTH
CENTRAL PERSHING COUNTY...

AT 503 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LARGE AREA OF LIGHT TO MODERATE RAIN OVER THE WARNED 
AREA. 

WHILE THE STRONGER STORMS PRODUCING TORRENTIAL RAINFALL HAVE MOVED 
AWAY FROM THE AREA...EXCESSIVE RUNOFF FROM EARLIER RAINFALL AND 
ONGOING STEADY RAINS MAY STILL CAUSE FLOODING OF SMALL CREEKS AND 
STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND AND RANCHLAND ALONG 
THE BANKS OF CREEKS AND STREAMS ON THE WEST SIDE OF THE EAST RANGE 
EXTENDING TO I-80 FROM MILL CITY TO SOUTHWEST OF WINNEMUCCA.

MOTORISTS SHOULD AVOID CROSSING ROADWAYS WHERE WATER COVERS THE 
ROAD. 

LAT...LON 4055 11791 4066 11807 4078 11801 4086 11795
      4086 11790 4062 11786

$$

HOHMANN

257 
WGUS75 KREV 040052
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
552 PM PDT SUN OCT 3 2010

NVC027-040102-
/O.EXP.KREV.FF.W.0018.000000T0000Z-101004T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PERSHING NV-
552 PM PDT SUN OCT 3 2010

...THE FLASH FLOOD WARNING HAS EXPIRED FOR NORTH CENTRAL PERSHING
COUNTY...

THE THREAT FOR CONTINUED FLASH FLOODING HAS DIMINISHED. REMEMBER THAT
MINOR FLOODING OR RUNOFF MAY CONTINUE IN LOW SPOTS FOR SEVERAL HOURS.

LAT...LON 4055 11791 4066 11807 4078 11801 4086 11795
      4086 11790 4062 11786

$$

HOHMANN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
336 PM PDT SUN OCT 3 2010

.SHORT TERM...
A WIDE BAND OF RAIN HAS DEVELOPED FROM LAKE TAHOE NORTH ALONG THE
NV/CA STATE LINE AND IS DROPPING ANYWHERE FROM 0.05-0.25 INCHES OF
RAIN PER HOUR. THE RAIN WILL PERSIST INTO THIS EVENING WITH THE
HEAVIEST RAIN RATES FALLING ALONG THE NV/CA BORDER BETWEEN TRUCKEE
AND HALLELUJAH JUNCTION. CONVECTIVE ACTIVITY HAS BEEN LIMITED TO THE
EASTERN HALF OF THE CWA AS THE SIERRA AND EXTREME WESTERN NV HAVE
HAD AMPLE CLOUD COVER TODAY...WHICH HAS PREVENTED MUCH DAYTIME
HEATING. THE WEAK ISOLATED THUNDERSTORMS OVER EASTERN
CHURCHILL...PERSHING AND MINERAL COUNTIES WILL LAST THROUGH THIS
EVENING.

THE SHOWERS AND THUNDERSTORMS ARE ASSOCIATED WITH A LOW PRESSURE
SYSTEM THAT HAS DRAWN MONSOONAL MOISTURE UP FROM THE SOUTH WHILE
BEING INFLUENCED BY A DEEP TROUGH APPROACHING FROM THE NORTHWEST.
THE UPPER JET ASSOCIATED WITH THE APPROACHING TROUGH WILL HELP TO
ENHANCE THE DYNAMICS OF THE LOW...BRINGING ONGOING RAIN SHOWERS WITH
HIGH ELEVATION SNOW OVER THE SIERRA AND INTO WESTERN NEVADA FOR THE
FIRST HALF OF THIS WEEK.

THERE LOOKS TO BE A DECENT CHANCE FOR CONVECTION TOMORROW EVENING AS
THE TROUGH AXIS MOVES OVER CENTRAL CA AND TURNS THE FLOW EAST IN NV.
THIS WILL CREATE AN UPSLOPE FORCING SITUATION ALONG THE EASTERN SIDE
OF THE SIERRA. THE INSTABILITY WILL ALSO INCREASE AS THE LOW BRINGS
COLD AIR ALOFT OVER THE AREA...EFFECTIVELY DROPPING SNOW LEVELS
BETWEEN 7000-7500 FEET BY LATE MONDAY. WITH RELATIVELY WARM
ROAD/GROUND SURFACES...BEST CHANCES FOR SNOW ACCUMULATION WILL BE
ABOVE 8000 FEET MONDAY NIGHT INTO TUESDAY MORNING WITH MAIN IMPACTS
BEING AT THE SIERRA PASSES.

BY TUESDAY MORNING THE UPPER LOW CUTS OFF FROM THE MAIN TROUGH AND
IS TRAPPED UNDER A BUILDING RIDGE OVER THE NORTHWESTERN US. THE
NEWLY FORMED CLOSED LOW IS EXPECTED TO SETTLE OVER THE REGION
THROUGH THE SHORT TERM PERIOD BRINGING SHOWERS...CLOUD COVER AND
MUCH COOLER TEMPERATURES. LABELLE

.LONG TERM...THURSDAY THROUGH SUNDAY... UPPER LOW OVER THE AREA
SHOULD KICK EAST BY THE WEEKEND AS THE JET MOVES INTO BRITISH
COLUMBIA. THIS WILL ALLOW FOR A RIDGE TO DEVELOP ALONG THE WEST
COAST BY FRIDAY. MEDIUM RANGE MODELS ARE IN FAIRLY GOOD AGREEMENT
THROUGH FRIDAY WITH THE GFS STILL SLIGHTLY FASTER THAN THE EC.

SHOWERS ARE POSSIBLE UNTIL THE LOW EXITS THE AREA COMPLETELY BY
FRIDAY MORNING. TEMPERATURES WILL BEGIN TO WARM UP AS RIDGING BUILDS
IN BEHIND THE LOW...WITH NORMAL TEMPERATURES RETURNING BY SATURDAY.
RIDGING WILL CONTINUE TO BUILD OVER THE REGION THROUGH NEXT
WEEKEND. LINDAMAN

&&

.AVIATION...
CUT OFF LOW OVER THE AREA WILL CONTINUE TO BRING ABUNDANT MOISTURE
OVER THE SIERRA AND WESTERN NEVADA. SHOWERS AND SOME ISOLATED
THUNDERSTORMS ARE EXPECTED THROUGH THE EVENING AND INTO TONIGHT.
MODERATE TO HEAVY RAIN WITH MVFR CONDITIONS/MOUNTAIN OBSCUREMENT
LIKELY AT ALL TERMINALS...WITH SMALL HAIL AND GUSTS 35-40KTS
POSSIBLE WITH THE STRONGER STORMS.

FREEZING LEVELS SHOULD EASILY DROP BELOW 9000 FEET MONDAY WITH
SHOWERS AND PRECIP BANDS AFFECTING THE REGION THROUGH MUCH OF NEXT
WEEK.  MVFR CONDITIONS LIKELY IN THE SIERRA...WITH POTENTIAL FOR IFR
IF HEAVY SNOW SHOWERS DEVELOP. BRONG/LINDAMAN
&&

.REV WATCHES/WARNINGS/ADVISORIES...
NV...NONE.
CA...NONE.
&&

HTTP://WEATHER.GOV/RENO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
314 PM PDT SUN OCT 3 2010

CAZ070>073-NVZ001>005-041200-
SURPRISE VALLEY CALIFORNIA-LASSEN-EASTERN PLUMAS-
EASTERN SIERRA COUNTIES-GREATER LAKE TAHOE AREA-MONO-
MINERAL AND SOUTHERN LYON COUNTIES-GREATER RENO-CARSON CITY-
MINDEN AREA-WESTERN NEVADA BASIN AND RANGE INCLUDING PYRAMID LAKE-
NORTHERN WASHOE COUNTY-
INCLUDING THE CITIES OF...CEDARVILLE...EAGLEVILLE...
FORT BIDWELL...PORTOLA...SUSANVILLE...WESTWOOD...SIERRAVILLE...
LOYALTON...SOUTH LAKE TAHOE...TAHOE CITY...TRUCKEE...
MARKLEEVILLE...BRIDGEPORT...COLEVILLE...LEE VINING...
MAMMOTH LAKES...HAWTHORNE...YERINGTON...SMITH VALLEY...MINA...
SCHURZ...GLENBROOK...INCLINE VILLAGE...SPARKS...VERDI...
GARDNERVILLE...FERNLEY...FALLON...LOVELOCK...SILVER SPRINGS...
NIXON...IMLAY...EMPIRE...GERLACH
314 PM PDT SUN OCT 3 2010

...RAIN AND HIGH ELEVATION SNOW MONDAY THROUGH WEDNESDAY...

LOW PRESSURE OVER CENTRAL CALIFORNIA WILL MERGE WITH A STRONGER
SYSTEM NEARING THE CALIFORNIA COAST. ABUNDANT MOISTURE AND
INSTABILITY OVER THE SIERRA AND WESTERN NEVADA WILL HELP TO
GENERATE SHOWERS AND THUNDERSTORMS THROUGH MONDAY. STRONGER
SHOWERS AND THUNDERSTORMS WILL PRODUCE HEAVY RAIN. RAINFALL
AMOUNTS OF 0.50 INCHES OR MORE ARE POSSIBLE IN A SHORT PERIOD OF
TIME...WHICH COULD LEAD TO PONDING OF WATER ON ROADS AND POORLY
DRAINED URBAN AREAS.

THE STRONGER SYSTEM WILL MOVE OVER NEVADA AND CALIFORNIA MONDAY AND
REMAIN NEARLY STATIONARY THROUGH THURSDAY. THIS SYSTEM WILL
GENERATE PERSISTING RAIN AND SNOW...AND LOWER SNOW LEVELS TO
AROUND 7500 FEET.

THERE IS THE POTENTIAL FOR HEAVY PRECIPITATION BANDS TO DEVELOP
MONDAY THROUGH WEDNESDAY OVER THE SIERRA AND WESTERN NEVADA.
ADDITIONAL PRECIPITATION AMOUNTS OF ONE THIRD TO ONE INCH ARE POSSIBLE
WITHIN THESE HEAVY BANDS. IN THE HIGHER ELEVATIONS OF THE
SIERRA...SEVERAL INCHES OF SNOW MAY ACCUMULATE...IMPACTING BACK
COUNTRY ACTIVITIES AND TRAVEL OVER MOUNTAIN PASSES ABOVE 8000
FEET.

TEMPERATURES WILL ALSO BE SIGNIFICANTLY COOLER EARLY THIS WEEK.
AFTERNOON HIGHS WILL ONLY REACH THE UPPER 50S IN SOME NEVADA VALLEYS
WITH 40S TO LOWER 50S IN THE SIERRA VALLEYS TUESDAY AND WEDNESDAY.
HIGH TEMPERATURES MAY BE EVEN COLDER IF CLOUD COVER AND SHOWERS
PERSIST THROUGHOUT THE DAY.

HTTP://WEATHER.GOV/RENO

LABELLE