Flash Flood Warning 43, NWS Reno, NV

237 
WGUS75 KREV 091906
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
1206 PM PDT THU JUL 9 2015

NVC005-019-510-092115-
/O.CON.KREV.FF.W.0043.000000T0000Z-150709T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARSON CITY NV-LYON NV-DOUGLAS NV-
1206 PM PDT THU JUL 9 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM PDT FOR
WEST CENTRAL LYON AND NORTHWESTERN DOUGLAS COUNTIES AND CARSON
CITY...

AT 1203 PM PDT...DOPPLER RADAR MODERATE RAIN CONTINUING TO FALL  
ACROSS THE WARNED AREA. A NATIONAL WEATHER SERVICE EMPLOYEE IS 
REPORTING FLASH FLOODING IN THE JOHNSON LANE AREA OF MINDEN.

EXCESSIVE RAINFALL OVER THE WARNED AREA WILL CAUSE MUD SLIDES NEAR
STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION
AND OTHER LOOSE MATERIALS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... JOHNSON 
LANE...INDIAN HILLS...KINGSBURY...MINDEN-TAHOE AIRPORT...MINDEN...US 
395 AT DOUGLAS-CARSON CITY CO LINE AND STEWART.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A LIFE THREATENING FLASH FLOOD. MOVE TO HIGHER GROUND IF YOU
ARE IN A FLOOD PRONE OR LOW LYING AREA.

THIS IS A VERY DANGEROUS SITUATION! RUNOFF WILL QUICKLY FLOOD LOW
LYING AREAS...STREETS...STREAMS...CREEKS...AND RIVERS. MANY ROADWAYS
WILL BE CLOSED DUE TO THE HEAVY RAINFALL AND TRAVEL IS NOT
RECOMMENDED.

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3912 11947 3896 11948 3896 11985 3912 11987

$$

JW

613 
WGUS75 KREV 092017
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
117 PM PDT THU JUL 9 2015

NVC005-019-510-092115-
/O.CON.KREV.FF.W.0043.000000T0000Z-150709T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARSON CITY NV-LYON NV-DOUGLAS NV-
117 PM PDT THU JUL 9 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM PDT FOR
WEST CENTRAL LYON AND NORTHWESTERN DOUGLAS COUNTIES AND CARSON
CITY...

AT 116 PM PDT...HEAVY RAIN HAS ENDED BUT MANY ROADS IN THE JOHNSON 
LANE AREA OF MINDEN ARE EXPERIENCING FLOODING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... CARSON 
CITY...GARDNERVILLE...JOHNSON LANE...INDIAN HILLS...MINDEN-TAHOE 
AIRPORT...MINDEN...US 395 AT DOUGLAS-CARSON CITY CO LINE AND STEWART.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES.  ADDITIONALLY... 
COUNTRY ROADS...AND RANCHLAND ALONG THE BANKS OF CREEKS...STREAMS 
AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 3912 11947 3896 11948 3896 11985 3912 11987

$$

JW

889 
WGUS75 KREV 092111
FFSREV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
211 PM PDT THU JUL 9 2015

NVC005-019-510-092120-
/O.EXP.KREV.FF.W.0043.000000T0000Z-150709T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARSON CITY NV-LYON NV-DOUGLAS NV-
211 PM PDT THU JUL 9 2015

...THE FLASH FLOOD WARNING FOR WEST CENTRAL LYON AND NORTHWESTERN
DOUGLAS COUNTIES AND CARSON CITY WILL EXPIRE AT 215 PM PDT...

FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES AS MANY ROADS REMAIN IMPASSABLE.

LAT...LON 3912 11947 3896 11948 3896 11985 3912 11987

$$

JW

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE RENO NV
904 AM PDT THU JUL 9 2015

.UPDATE...
UPPER LOW TRACKING ACROSS SOUTHERN CA THIS MORNING WITH CONVECTION
ALREADY ONGOING ALONG THE SIERRA SOUTH OF LAKE TAHOE. 12Z NAM
SOUNDINGS INDICATE SUFFICIENT SPEED IN THE STORM BEARING LAYER
ALONG WITH LARGE CAPES ON THE ORDER OF 1000 J/KG, ESPECIALLY
ACROSS WESTERN NV, TO PRODUCE STRONG THUNDERSTORMS. A FEW STORMS
WILL APPROACH SEVERE CRITERIA WITH LARGE HAIL AND VERY HEAVY RAIN.
HIGHER ELEVATIONS MAY SEE LARGE ACCUMULATIONS OF SMALL HAIL TODAY
ESPECIALLY IN MONO COUNTY CLOSER TO UPPER LOW. EXPECT CONVECTION
TO FIRE EARLY. WE HAVE BUMPED UP COVERAGE A BIT THROUGH 03Z. HOHMANN

&&

.PREVIOUS DISCUSSION... /ISSUED 259 AM PDT THU JUL 9 2015/

SYNOPSIS...

SHOWERS, ISOLATED THUNDERSTORMS AND MILD TEMPERATURES ARE EXPECTED
TODAY FOR THE SIERRA AND WESTERN NEVADA AS AN UPPER LOW MOVES INTO
CALIFORNIA. CHANCES FOR SHOWERS AND STORMS DECREASE FRIDAY AND
SATURDAY AS A DRIER AIRMASS BEGINS TO WORK INTO THE REGION. EARLY
NEXT WEEK, SHOWERS WILL END WITH TEMPERATURES SLOWLY WARMING BACK
TO NEAR AVERAGE.

SHORT TERM...

LOW PRESSURE HAS FINALLY DECIDED TO MOVE INTO CALIFORNIA NEAR
MONTEREY BAY AFTER MILLING AROUND OFFSHORE FOR ALMOST A WEEK. AN
IMPULSE ROTATING AROUND THE LOW IS CURRENTLY WORKING THROUGH WEST-
CENTRAL NEVADA NEAR/SOUTH OF HIGHWAY 50. NOCTURNALLY/UPPER
DISTURBANCE-DRIVEN THUNDERSTORMS EARLIER SOUTH OF HIGHWAY 50 HAVE
ENDED FOR THE MOST PART ALTHOUGH THERE ARE SOME ISOLATED SHOWERS
LEFTOVER AT THIS TIME BASED ON RADAR.

TODAY, ANOTHER ROUND OF SCATTERED TO WIDESPREAD SHOWERS ARE
EXPECTED FOR NORTHEAST CALIFORNIA, THE SIERRA AND WESTERN NEVADA
AS THE UPPER LOW SLIDES EAST OVER THE SIERRA BY LATE AFTERNOON.
WITH HIGH TEMPERATURES EASING DOWN FURTHER AND AN EARLY START
PROGGED BY MODELS FOR SHOWERS (WHICH SHOULD RESTRICT INSTABILITY),
THUNDERSTORMS ARE EXPECTED TO A BIT TAMER OVERALL. THAT BEING
SAID, THERE IS STILL AT LEAST A FEW HUNDRED J/KG OF CAPE SHOWING
UP IN MODEL SOUNDINGS AND MOISTURE REMAINS FAIRLY HIGH, SO SOME
STORMS COULD CERTAINLY PRODUCE HEAVY RAIN ESPECIALLY IF SHOWERS
HOLD OFF LONGER THAN PROGGED (FOR INCREASED INSTABILITY). ALSO,
FLASH FLOODING IS STILL LOCALLY POSSIBLE IF STORMS GET LOCKED TO
TERRAIN OR GO OVER BURN AREAS.

TONIGHT AND FRIDAY MORNING, ISOLATED TO SCATTERED SHOWERS MAY
PERSIST AS THE UPPER LOW CONTINUES TO SLIDE BY TO THE SOUTH.
FRIDAY AFTERNOON AND EVENING, COVERAGE OF STORMS IS EXPECTED TO
BEGIN EASING DOWN AS THE UPPER LOW OPENS UP AND BEGINS TO PULL OFF
TO THE EAST. STILL, WEAK TROUGHING WILL HANG AROUND WITH MOISTURE
STILL AROUND SO SCATTERED STORMS ARE EXPECTED AGAIN, ESPECIALLY IN
THE FAVORED AREAS OF LASSEN/NORTHERN WASHOE COUNTIES AND MONO-
MINERAL COUNTIES.

SATURDAY, WARMING ALOFT AND SOME LOW LEVEL DRYING MOVES IN AS
SOUTHWEST FLOW ALOFT DEVELOPS BEHIND THE EXITING TROUGH. THIS
SHOULD SUPPRESS CONVECTION FOR MANY AREAS. HOWEVER, A FEW
DIURNALLY-LINKED STORMS CANNOT BE RULED OUT IN THE FAVORED
LASSEN-NORTHERN WASHOE AND MONO-MINERAL COUNTY AREAS.

LONG TERM...SUNDAY THROUGH WEDNESDAY...

WE BASICALLY LEFT THE EXTENDED FORECAST UNCHANGED THIS PERIOD AS
MEDIUM RANGE OPERATIONAL MODELS REMAIN IN DECENT AGREEMENT THAT A
LONG WAVE TROUGH WILL DEVELOP OFFSHORE. THIS WILL PROVIDE SOUTHWEST
FLOW ALOFT AND BEGIN TO PUSH THE MOISTURE THAT HAS BEEN ENTRENCHED
OVER THE REGION OFF TO THE EAST.

THE ECMWF IS A LITTLE SLOWER TO MOVE THE MOISTURE OUT AND WE WILL
MAINTAIN SLIGHT CHANCE POPS OVER THE FAR NORTHERN CWA SUNDAY...BUT
OTHERWISE THIS WILL BE A DRY FORECAST WITH SLOWLY RISING HIGH
TEMPERATURES. THE ECMWF DOES TRY TO INDICATE SOME CONVECTION OVER
THE FAR NORTH BY WEDNESDAY IN RESPONSE TO A SHORT WAVE...BUT MOST OF
THE GEFS ENSEMBLE MEMBERS SHOW MORE OF A ZONAL FLOW PATTERN BY THEN.
WILL LEAVE OUT ANY POPS JUST YET.

HIGH TEMPERATURES RISE TO NEAR AVERAGE AGAIN BY TUESDAY AND
WEDNESDAY AFTER STAYING BELOW NORMAL FOR SUNDAY AND MONDAY. 20

AVIATION...

UPPER LOW MOVING OVER THE REGION SHOULD PRODUCE MORE WIDESPREAD
CLOUDINESS AND SHOWERS WITH LESS CHANCE OF THUNDERSTORMS DUE TO
DECREASED LOW LEVEL INSTABILITY. CHANCES OF ANY TERMINAL
EXPERIENCING A THUNDERSTORM THROUGH THIS EVENING IS LESS THAN 30%.
WHILE CLOUDS WILL BE MORE WIDESPREAD CIGS AND VSBYS SHOULD GENERALLY
BY VFR THROUGH THE EVENING. WHERE HEAVIER SHOWERS DEVELOP THERE WILL
BE PERIODS OF MVFR CEILINGS AND MOUNTAIN TOPS ARE MORE LIKELY TO BE
OBSCURED TODAY. TURBULENCE SHOULD BE CONFINED TO NEAR EMBEDDED
THUNDERSTORM CELLS AND SURFACE WINDS WILL BE FAIRLY LIGHT.

THE LOW IS STILL PRESENT FOR FRIDAY...BUT BEGINNING TO WEAKEN. THERE
SHOULD BE LESS COVERAGE OF SHOWERS AND THUNDERSTORMS BY FRIDAY AND
EVEN LESS AS WE MOVE INTO THE WEEKEND AND BEGIN TO DRY OUT THE
ATMOSPHERE OVER THE REGION. 20

&&

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

FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/RENO (ALL LOWER CASE)