Severe Thunderstorm Warning 1, NWS Reno, NV

244 
WWUS55 KREV 070150
SVSREV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
650 PM PDT MON MAY 6 2013

CAC049-NVC031-070200-
/O.CON.KREV.SV.W.0001.000000T0000Z-130507T0200Z/
MODOC CA-WASHOE NV-
650 PM PDT MON MAY 6 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM PDT
FOR NORTHWESTERN WASHOE AND NORTHEASTERN MODOC COUNTIES...

AT 648 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS 
OF 60 MPH. THESE STORMS WERE LOCATED 14 MILES NORTH OF FORT BIDWELL 
MOVING WEST AT 35 MPH. IN ADDITION...VERY HEAVY RAIN WAS OBSERVED AT 
AN OBSERVATION SITE OVER FAR NORTHERN WASHOE COUNTY WITH NEARLY ONE 
HALF INCH OF RAIN AS THE STORM PASSED.

* LOCATIONS AFFECTED INCLUDE...FORT BIDWELL...LAKE CITY...CALCUTTA
  LAKE AND YELLOW PEAK.

LAT...LON 4179 11950 4159 12019 4163 12022 4170 12023
      4172 12018 4187 12020 4192 12013 4197 12011
      4201 12002 4201 11965
TIME...MOT...LOC 0147Z 061DEG 18KT 4206 12004 4175 11983

$$

HOHMANN

595 
WWUS55 KREV 070203
SVSREV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
703 PM PDT MON MAY 6 2013

CAC049-NVC031-070213-
/O.EXP.KREV.SV.W.0001.000000T0000Z-130507T0200Z/
MODOC CA-WASHOE NV-
703 PM PDT MON MAY 6 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WASHOE AND
NORTHEASTERN MODOC COUNTIES HAS EXPIRED...

THE STORMS THAT EARLIER PROMPTED THE SEVERE THUNDERSTORM WARNING HAVE
WEAKENED...THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. 
HOWEVER...STRONG THUNDERSTORMS WILL REMAIN NEAR THE AREA THROUGH 
730 PM...CAPABLE OF PRODUCING GUSTY WINDS...DEADLY LIGHTNING...AND 
BRIEF HEAVY RAINS.

LAT...LON 4179 11950 4159 12019 4163 12022 4170 12023
      4172 12018 4187 12020 4192 12013 4197 12011
      4201 12002 4201 11965
TIME...MOT...LOC 0150Z 061DEG 18KT 4205 12006 4174 11985

$$

HOHMANN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
219 PM PDT MON MAY 6 2013

.SYNOPSIS...

LOW PRESSURE LOCATED OFF THE CALIFORNIA COAST WILL MOVE ACROSS
SOUTHERN CALIFORNIA ON TUESDAY AND WEDNESDAY. SHOWERS AND
THUNDERSTORMS WILL PERSIST THROUGH MUCH OF THIS WEEK, WITH THE
BEST CHANCES FOR PRECIPITATION TODAY THROUGH TUESDAY. CLOUD COVER
WILL KEEP DAYTIME TEMPERATURES BELOW NORMAL THROUGH MIDWEEK,
FOLLOWED BY A WARMING TREND THROUGH NEXT WEEKEND.

&&

.SHORT TERM...

CURRENT WATER VAPOR IMAGERY DEPICTS THE CUTOFF LOW PRESSURE SYSTEM
DROPPING SOUTH ALONG THE CALIFORNIA COAST A COUPLE HUNDRED MILES
WEST OF MONTEREY. THE ASSOCIATED MOISTURE AXIS CONTINUES TO PIVOT
NORTHWARD ACROSS WESTERN NEVADA THIS AFTERNOON AS THE UPPER LOW
ELONGATES ACROSS CENTRAL CALIFORNIA. IT WAS UNDER THIS MOISTURE
AXIS THAT A PERSISTENT BAND OF PRECIPITATION DEVELOPED EARLY THIS
MORNING WHICH RESULTED IN 0.5-1.0 INCHES OF LIQUID PRECIPITATION
ACROSS ALPINE COUNTY AND THE LAKE TAHOE BASIN AND 6-9 INCHES OF
SNOW ABOVE 7500 FEET BETWEEN CARSON PASS AND ECHO SUMMIT.

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS HAVE DEVELOPED
ACROSS WESTERN NEVADA AND NORTHEAST CALIFORNIA EARLY THIS
AFTERNOON. THE 19Z SPC MESOANALYSIS ANALYZED SOME WEAK INSTABILITY
ALONG THE SIERRA FRONT WITH 500 J/KG OF CAPE. THE MAIN THREAT WITH
THESE STORMS AS THEY MOVE NORTHWEST WILL BE BRIEF HEAVY RAINFALL,
GUSTY WINDS UP TO 40 MPH AND SMALL PEA SIZED HAIL.

THE 12Z NAM AND GFS CONTINUE TO BE IN GOOD AGREEMENT ON THE PATH
OF THE UPPER LOW ACROSS SOUTHERN CALIFORNIA ON TUESDAY. BOTH
MODELS DEPICT A WRAP-AROUND BAND THAT WILL IMPACT PORTIONS OF
WESTERN NEVADA AND THE SIERRA ON TUESDAY AND TUESDAY NIGHT. ONE
CONSIDERATION IS THE PREEXISTING MOISTURE AXIS AND WHETHER IT WILL
ACT AS A FOCUSING MECHANISM TO ORGANIZE ADDITIONAL SHOWERS
OVERNIGHT TONIGHT AND TOMORROW MORNING.

AS THE UPPER LOW MOVES ACROSS SOUTHERN CALIFORNIA, SNOW LEVELS
WILL LOWER TO 7000-7500 FEET ON TUESDAY FOR AREAS SOUTH OF US
HIGHWAY 50 WITH 700 MB TEMPS PROGGED TO REACH -3C. THE CURRENT
FORECAST GRIDS CONTAIN A FEW SLUSHY INCHES OF SNOW FOR ELEVATIONS
ABOVE 7500 FEET IN MONO COUNTY, HOWEVER PROLONGED SHOWERS MAY
RESULT IN SLIGHTLY HIGHER ACCUMULATIONS AS WE SAW THIS MORNING
ACROSS ALPINE AND EL DORADO COUNTIES.

THE UPPER LOW WILL FINALLY MOVE EAST INTO THE FOUR CORNERS REGION
ON WEDNESDAY. RESIDUAL MOISTURE AND A FEW DEGREES OF WARMING WILL
LIKELY RESULT IN ANOTHER ROUND OF SCATTERED SHOWERS AND
THUNDERSTORMS ON WEDNESDAY AFTERNOON. MYRICK

.LONG TERM...THURSDAY THROUGH MONDAY...

MADE ONLY MINOR CHANGES TO THE EXTENDED FORECAST WITH THIS
PACKAGE. DID LOWER PRECIPITATION CHANCES SATURDAY AFTERNOON ALONG
THE EASTERN SIERRA. THIS WAS BASED PRIMARILY ON THE POSITION OF
THE RIDGE AXIS DIRECTLY OVER THE EASTERN SIERRA. THERE MAY BE A
FEW BUILD-UPS, BUT THEY WILL BE CAPPED BY THE STRONGER SUBSIDING
AIR ALOFT.

OTHERWISE, MODELS CONTINUE TO BE CONSISTENT AT LEAST THROUGH EARLY
SUNDAY. RIDGING BUILDS ACROSS NORTHERN CALIFORNIA AND WESTERN
NEVADA BY MIDWEEK. RESIDUAL MOISTURE FROM THE PREVIOUS LOW WILL
BE SUFFICIENT FOR AFTERNOON THUNDERSTORMS OVER THE EASTERN SIERRA
THURSDAY AND FRIDAY. THE GFS CONTINUES TO SHOW ANOMALOUSLY HIGH
CAPE VALUES IN EXCESS OF 1000 J/KG FOR THURSDAY INDICATING AT
LEAST THE POTENTIAL FOR THUNDERSTORMS IN THE SIERRA. BY SATURDAY,
WITH THE RIDGE AXIS OVER THE SIERRA AND DRYING OF THE AIRMASS,
SHOWERS AND THUNDERSTORMS WILL BECOME UNLIKELY.

MODELS DIVERGE SUNDAY AFTERNOON INTO THE BEGINNING OF THE NEXT
WEEK. THE GFS BECOMES MORE PROGRESSIVE WITH THE RIDGE AND HAS A
STRONGER LOW MOVING ALONG THE BACKSIDE OF THE RIDGE. THE ECMWF
KEEPS THE STRONG RIDGE IN PLACE AND SHUNTS THE APPROACHING LOW
INTO THE CANADIAN ROCKIES. HAVE OPTED FOR MORE OF A BLENDED
SOLUTION AND INTRODUCED SLIGHT CHANCES OF PRECIPITATION BY
MONDAY FOR NORTHERN LASSEN, MODOC, AND VERY NORTHERN WASHOE
COUNTIES. HOWEVER, I DO NOT THINK THE RIDGE WILL BE AS QUICK TO
MOVE. THEREFORE, I DID NOT SPREAD PRECIPITATION FARTHER SOUTH THAN
THE NORTHERN ZONES.  BOYD

&&

.AVIATION...

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS HAVE OVERSPREAD
WESTERN NEVADA AND THE SIERRA. THESE SHOWERS WILL CONTINUE INTO
THE EVENING HOURS. EXPECT PRECIPITATION TO SLACKEN LATE THIS
EVENING WITH A FEW LINGERING OVERNIGHT SHOWERS POSSIBLE. TOMORROW
BRINGS ANOTHER ROUND OF SCATTERED SHOWERS WITH ISOLATED
THUNDERSTORMS.

DUE TO AMOUNT OF PRECIPITATION OVER THE LAST 24 HOURS IN THE
VICINITY OF KTVL AND KTRK, EXPECT A PERIOD OF FOG/MIST EARLY
TUESDAY MORNING. SIERRA VALLEYS COULD FOG IN EVEN WITH PERSISTENT
CLOUD LAYERS AS COLD AIR FROM NEW ELEVATED SNOW SINKS INTO THE
VALLEYS.

AS TUESDAY WEARS ON, SHOWERS WILL RE-DEVELOP CAUSING INTERMITTENT
MVFR/IFR CONDITIONS POTENTIALLY FOR ALL TERMINALS. SIMILAR TO
TODAY, EXPECT MAINLY SHOWERS WITH A FEW ISOLATED THUNDERSTORMS.
TERMINALS EAST OF THE SIERRA FRONT WILL HAVE THE BEST CHANCES,
ESPECIALLY WHERE CLOUDS CLEAR DURING THE DAY ALLOWING FOR HEATING
TO DESTABILIZE THE ATMOSPHERE. CONDITIONS IMPROVE WEDNESDAY WHEN
LOW PRESSURE EXITS NEVADA INTO UTAH. AFTERNOON SHOWERS AND
THUNDERSTORMS WILL BE POSSIBLE OVER THE SIERRA FROM MID TO LATE
WEEK. BOYD

&&

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

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RENO NV
656 AM PDT MON MAY 6 2013

CAZ070>073-NVZ001>005-071400-
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-
656 AM PDT MON MAY 6 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE EASTERN SIERRA...
NORTHEAST CALIFORNIA AND WESTERN NEVADA.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS CAN BE EXPECTED AGAIN TODAY AND TONIGHT
ACROSS THE EASTERN SIERRA AND WESTERN NEVADA REGION. SNOW IS
ACCUMULATING ON THE HIGHER PASSES CROSSING THE SIERRA THIS MORNING
AND THIS WILL MAKE FOR DIFFICULT TRAVEL CONDITIONS. MOTORISTS ARE
URGED TO USE CAUTION TODAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE REGION THROUGH
THURSDAY. DUE TO THE COLD AIR ALOFT...SNOW SHOWERS WILL AGAIN BE
POSSIBLE IN THE HIGHER ELEVATIONS OF THE EASTERN SIERRA TONIGHT.
HIGH PRESSURE WILL BUILD INTO THE REGION ON FRIDAY...BRINGING A
RETURN TO DRIER CONDITIONS AND ABOVE NORMAL TEMPERATURES.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

O'HARA

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

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
438 PM PDT MON MAY 6 2013

CAZ071-070015-
LASSEN-EASTERN PLUMAS-EASTERN SIERRA COUNTIES-
438 PM PDT MON MAY 6 2013

...STRONG THUNDERSTORM OVER NORTHWESTERN LASSEN COUNTY...

AT 430 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A STRONG THUNDERSTORM 13 MILES SOUTHEAST OF ADIN...OR 21 MILES EAST
OF BIEBER...AND MOVING WEST NORTHWEST AT 15 MPH.

FREQUENT LIGHTNING...HEAVY RAIN WITH AMOUNTS NEAR ONE INCH PER
HOUR...SMALL PEA SIZE HAIL...AND STRONG GUSTY WINDS TO 50 MPH...WILL
OCCUR WITH THIS STORM.

* LOCATIONS AFFECTED INCLUDE...BIEBER...JUNCTION CA 139 AND CA299
  AT THE LASSEN-MODOC COUNTY LINE.

DURING A THUNDERSTORM...SEEK SHELTER INSIDE A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS. HIKERS AND CAMPERS SHOULD SEEK SHELTER IN A
VEHICLE IF POSSIBLE.

&&

LAT...LON 4120 12112 4119 12068 4116 12059 4101 12074
      4111 12117
TIME...MOT...LOC 2336Z 114DEG 11KT 4111 12075

BOYD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
519 PM PDT MON MAY 06 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0420 PM     TSTM WND GST     24 ESE BIEBER           40.99N 120.71W
05/06/2013  M65.00 MPH       LASSEN             CA   MESONET

            ESTIMATED TIME BASED ON STORM LOCATION.

&&

KHOHMANN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
603 PM PDT MON MAY 06 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0601 PM     HEAVY RAIN       YERINGTON               38.99N 119.16W
05/06/2013  M0.50 INCH       LYON               NV   TRAINED SPOTTER

            MEASURED BETWEEN 5PM AND 6PM.

&&

KHOHMANN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
616 PM PDT MON MAY 6 2013

CAZ071>073-NVZ001>003-005-070230-
GREATER LAKE TAHOE AREA-GREATER RENO-CARSON CITY-MINDEN
AREA-LASSEN-EASTERN PLUMAS-EASTERN SIERRA COUNTIES-MINERAL AND
SOUTHERN LYON COUNTIES-MONO-NORTHERN WASHOE COUNTY-
616 PM PDT MON MAY 6 2013

...STEADY RAINS MOVING ACROSS THE HIGHWAY 395 CORRIDOR FROM
HALLELUJAH JUNCTION TO RENO TO CARSON CITY AND MINDEN...

AT 612 PM PDT...A LARGE AREA OF RAIN WITH EMBEDDED THUNDERSTORMS
EXTENDED ALONG HIGHWAY 395 NEAR THE SIERRA FRONT. STEADY RAINFALL
WILL RESULT IN PONDING OF WATER ON AREA ROADWAYS INCLUDING INCLUDING
I-80 FROM RENO TO TRUCKEE AND HIGHWAY 50 THROUGH CARSON CITY TO LAKE
TAHOE.

DRIVERS SHOULD EXPECT VISIBILITY REDUCTIONS IN HEAVIER SHOWERS. SLOW
DOWN WHEN ENCOUNTERING HEAVY RAIN AND TURN ON YOUR HEADLIGHTS. RAIN
WILL GRADUALLY TAPER AFTER 7 PM.

&&

LAT...LON 4004 12013 4006 11972 3999 11970 3989 11962
      3983 11947 3941 11942 3937 11946 3909 11946
      3908 11939 3866 11935 3859 11988 3865 11994
      3931 12025
TIME...MOT...LOC 0110Z 081DEG 8KT 3996 11960 3874 11948

HOHMANN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
616 PM PDT MON MAY 6 2013

CAZ071>073-NVZ001>003-005-070230-
GREATER LAKE TAHOE AREA-GREATER RENO-CARSON CITY-MINDEN
AREA-LASSEN-EASTERN PLUMAS-EASTERN SIERRA COUNTIES-MINERAL AND
SOUTHERN LYON COUNTIES-MONO-NORTHERN WASHOE COUNTY-
616 PM PDT MON MAY 6 2013

...STEADY RAINS MOVING ACROSS THE HIGHWAY 395 CORRIDOR FROM
HALLELUJAH JUNCTION TO RENO TO CARSON CITY AND MINDEN...

AT 612 PM PDT...A LARGE AREA OF RAIN WITH EMBEDDED THUNDERSTORMS
EXTENDED ALONG HIGHWAY 395 NEAR THE SIERRA FRONT. STEADY RAINFALL
WILL RESULT IN PONDING OF WATER ON AREA ROADWAYS INCLUDING I-80 FROM
RENO TO TRUCKEE AND HIGHWAY 50 THROUGH CARSON CITY TO LAKE TAHOE.

DRIVERS SHOULD EXPECT VISIBILITY REDUCTIONS IN HEAVIER SHOWERS. SLOW
DOWN WHEN ENCOUNTERING HEAVY RAIN AND TURN ON YOUR HEADLIGHTS. RAIN
WILL GRADUALLY TAPER AFTER 7 PM.

&&

LAT...LON 4004 12013 4006 11972 3999 11970 3989 11962
      3983 11947 3941 11942 3937 11946 3909 11946
      3908 11939 3866 11935 3859 11988 3865 11994
      3931 12025
TIME...MOT...LOC 0110Z 081DEG 8KT 3996 11960 3874 11948

HOHMANN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
619 PM PDT MON MAY 6 2013

CAZ071>073-NVZ001>003-005-070230-
GREATER LAKE TAHOE AREA-GREATER RENO-CARSON CITY-MINDEN
AREA-LASSEN-EASTERN PLUMAS-EASTERN SIERRA COUNTIES-MINERAL AND
SOUTHERN LYON COUNTIES-MONO-NORTHERN WASHOE COUNTY-
619 PM PDT MON MAY 6 2013

...STEADY RAINS MOVING ACROSS THE HIGHWAY 395 CORRIDOR FROM
HALLELUJAH JUNCTION TO RENO TO CARSON CITY AND MINDEN...

AT 612 PM PDT...A LARGE AREA OF RAIN WITH EMBEDDED THUNDERSTORMS
EXTENDED ALONG HIGHWAY 395 NEAR THE SIERRA FRONT. STEADY RAINFALL
WILL RESULT IN PONDING OF WATER ON AREA ROADWAYS INCLUDING I-80 FROM
RENO TO TRUCKEE AND HIGHWAY 50 THROUGH CARSON CITY TO LAKE TAHOE.

DRIVERS SHOULD EXPECT VISIBILITY REDUCTIONS IN HEAVIER SHOWERS. SLOW
DOWN WHEN ENCOUNTERING HEAVY RAIN AND TURN ON YOUR HEADLIGHTS. RAIN
WILL GRADUALLY TAPER AFTER 7 PM. IN ADDITION, A COUPLE INCHES OF
SNOW MAY ACCUMULATE NEAR THE MOUNT ROSE SUMMIT AND MAKE TRAVEL
HAZARDOUS EARLY THIS EVENING.

&&

LAT...LON 4004 12013 4006 11972 3999 11970 3989 11962
      3983 11947 3941 11942 3937 11946 3909 11946
      3908 11939 3866 11935 3859 11988 3865 11994
      3931 12025
TIME...MOT...LOC 0110Z 081DEG 8KT 3996 11960 3874 11948

HOHMANN