Public Information Statement
Issued by NWS Las Vegas, NV

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NOUS45 KVEF 080751
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AZZ001>003-036-CAZ519>527-NVZ014>022-082000-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1251 AM PDT FRI MAY 8 2015

...A MONTH OF WARMTH...WIND...DUST AND A FEW DELUGES...

APRIL 2015 CONTINUED THE STREAK OF ABOVE NORMAL TEMPERATURES ACROSS
MOST OF THE MOJAVE DESERT AND SOUTHERN GREAT BASIN. HOWEVER, IN
CONTRAST TO RECENT MONTHS, THE MONTH DID NOT RANK AS ONE OF THE
WARMEST ON RECORD. MOST AREAS WERE BETWEEN ONE AND TWO DEGREES ABOVE
NORMAL FOR THE MONTH BASED ON AVERAGE TEMPERATURE.

A DRY COLD FRONT PASSED ACROSS THE AREA ON THE 2ND KNOCKING DOWN
TEMPERATURES SLIGHTLY. MANY LOCATIONS SET THEIR COLDEST READINGS OF
THE MONTH ON THE 3RD AND ESPECIALLY THE 4TH. LOW TEMPERATURES IN THE
COLDEST VALLEYS OF THE SOUTHERN GREAT BASIN DROPPED INTO THE TEENS
AND EVEN SINGLE DIGITS. AN AREA OF LOW PRESSURE DROPPED SOUTH ALONG
THE COAST AND MOVED INTO NORTHERN CALIFORNIA ON THE 7TH BEFORE
HEADING ACROSS CENTRAL CALIFORNIA AND SOUTH-CENTRAL NEVADA ON THE
8TH. A FEW LIGHT SHOWERS ACCOMPANIED THIS SYSTEM.

TEMPERATURES REBOUNDED THROUGH THE 13TH WHEN A VERY STRONG COLD
FRONT APPROACHED NORTHERN CALIFORNIA ON THE 14TH. THIS FRONT SWEPT
ACROSS THE LOCAL AREA DURING THE AFTERNOON AND EVENING OF THE 14TH
PRODUCING STRONG WINDS IN EXCESS OF 50 MPH IN MANY LOCATIONS. GUSTS
AS HIGH AS 58 MPH WERE MEASURED IN INDIAN SPRINGS, NEVADA. THE WIND
WAS STRONG ENOUGH TO BLOW OVER AT LEAST TWO SEMI TRUCKS IN SOUTH-
CENTRAL NEVADA ON HIGHWAY 95 - ONE NEAR GOLDFIELD SUMMIT AND ANOTHER
WEST OF TONOPAH.

THE STRONG WINDS LOFTED A LARGE AMOUNT OF DUST FROM DRY LAKE BEDS
AND THE SPARSELY VEGETATED AREAS OF ESMERALDA COUNTY, NEVADA
LARGELY NEAR THE COMMUNITY OF SILVER PEAK WHICH TRIGGERED A LARGE
SCALE DUST STORM THAT SWEPT SOUTH ACROSS NEVADA AND SOUTHEAST
CALIFORNIA ALONG WITH THE FRONT. THE LOWEST VISIBILITIES WERE
LOCATED NEAR COALDALE JUNCTION WHERE THE VISIBILITY WAS NEAR ZERO ON
AREA ROADS. IN SILVER PEAK, THE MINE WAS CLOSED DUE TO THE LOW
VISIBILITY ALONG WITH THE ACCESS ROAD TO IT. VISIBILITY WAS ALSO
SHARPLY REDUCED TO A QUARTER-MILE IN BEATTY AND AMARGOSA VALLEY AND
TO 100 FEET IN RACHEL. THE DUST THINNED A BIT AS THE FRONT MOVED
THROUGH FAR SOUTHERN NEVADA.

ANOTHER BLAST OF CHILLY AIR FOLLOWED THIS FRONT AND A FEW SPOTS
LOGGED THEIR COLDEST LOW OF THE MONTH ON THE MORNING OF THE 15TH.
WARMER CONDITIONS FOLLOWED THROUGH THE 20TH.

AN AREA OF LOW PRESSURE MOVING TRIGGERED A FEW SHOWERS AND
THUNDERSTORMS BETWEEN THE 19TH AND 24TH. ONE SHOWER PUSHED OFF THE
WHITE MOUNTAINS AND PRODUCED A 61 MPH GUST AT THE EASTERN SIERRA
REGIONAL AIRPORT IN BISHOP, CALIFORNIA ON THE 19TH. PEA SIZE HAIL
WAS REPORTED IN JOSHUA TREE, CALIFORNIA ON THE AFTERNOON OF THE
21ST.

ANOTHER POTENT COLD FRONT MOVED ACROSS THE AREA ON THE 25TH
PRODUCING SHOWERS AND THUNDERSTORMS AS WELL AS STRONG GRADIENT WINDS
WELL AHEAD OF THE FRONT. GUSTS UP TO 67 MPH WERE RECORDED AT THE
BICYCLE LAKE AIRFIELD ON FORT IRWIN, CALIFORNIA. HOWEVER, THIS FRONT
PRODUCED MOST OF THE PRECIPITATION THAT WAS MEASURED ACROSS THE
AREA. MUD AND ROCKS WASHED ONTO BADWATER ROAD IN DEATH VALLEY
NATIONAL PARK, CALIFORNIA RESULTING IN THE ROAD BEING CLOSED. AS
THUNDERSTORMS APPROACHED AMARGOSA VALLEY, NEVADA THEY TRIGGERED
BLOWING DUST THAT DROPPED VISIBILITY BRIEFLY TO A QUARTER OF A MILE.
THIS ACTIVITY THEN MOVED TOWARD PAHRUMP, NEVADA WHERE IT REDUCED
VISIBILITY TO A MILE AND DROPPED HAIL UP TO DIME SIZE. IN ADDITION,
A WIND GUST OF 57 MPH WAS MEASURED. THE WIND WAS POWERFUL ENOUGH
THOUGH TO SNAP A LARGE SATELLITE DISH AT A TELEVISION STATION AND
BREAK WINDOWS ON THE PAHRUMP NUGGET CASINO AS SNAP A LARGE TREE.

THE WARMEST WEATHER OF THE MONTH CLOSED OUT APRIL. ALL AREAS SET
THEIR HIGHEST TEMPERATURES OF THE MONTH ON THE 29TH OR 30TH.

...LAS VEGAS...

RECORDS DATE TO 1937 AT THE OFFICIAL CLIMATE STATION.

* TEMPERATURE AT MCCARRAN INTERNATIONAL AIRPORT.

                          OBSERVED      DEPARTURE     RANK
---------------------------------------------------------------------
AVG TEMPERATURE           68.8          +1.6          13TH WARMEST
AVG MAXIMUM TEMPERATURE   80.0          +1.7          30TH WARMEST
AVG MINIMUM TEMPERATURE   57.6          +1.5          7TH WARMEST

MONTHLY TEMPERATURE EXTREMES AT MCCARRAN

HIGHEST MAXIMUM TEMPERATURE...95 ON THE 30TH
LOWEST MAXIMUM TEMPERATURE...67 ON THE 15TH
HIGHEST MINIMUM TEMPERATURE...72 ON THE 30TH
LOWEST MINIMUM TEMPERATURE...49 ON THE 4TH AND 15TH

EXTREMES ELSEWHERE IN THE LAS VEGAS VALLEY DURING THE MONTH...

LOCATION                  LOWEST TEMP/DATE     HIGHEST TEMP/DATE
---------------------------------------------------------------------
HENDERSON EXEC. AIRPORT   44 ON 4TH & 16TH     94 ON 30TH
NELLIS AFB                41 ON 4TH            93 ON 30TH
NORTH LAS VEGAS ARPT      47 ON 4TH            94 ON 30TH
NORTH LAS VEGAS CO-OP     47 ON 4TH            95 ON 30TH
NWS OFFICE                45 ON 9TH            96 ON 30TH

* PRECIPITATION AT MCCARRAN INTERNATIONAL AIRPORT

MONTHLY TOTAL...0.26 INCH
DEPARTURE FROM NORMAL...+0.11 INCH
NUMBER OF DAYS WITH A TRACE OR MORE...2
NUMBER OF DAYS WITH MEASURABLE - 0.01 INCH - OR MORE...1
WETTEST DAY...0.26 INCH ON THE 25TH
NUMBER OF DAYS WITH A THUNDERSTORM...1
TOTAL SNOWFALL...0.0 INCH

TOTALS ELSEWHERE AROUND THE LAS VEGAS VALLEY FOR THE MONTH WERE
HIGHEST ON THE SOUTHERN END AND LOWEST IN THE FAR NORTHWEST.

LOCATION                           TOTAL            SOURCE
---------------------------------------------------------------------
PITTMAN WASH AT WIGWAM             0.43 INCH        CCRFCD
DESERT TORTOISE RESEARCH CENTER    0.39 INCH        CCRFCD
DURANGO & CACTUS                   0.39 INCH        CCRFCD
HEADWORKS CHANNEL/ANTHEM           0.39 INCH        CCRFCD
LAS VEGAS WASH AT PABCO GRADE      0.39 INCH        CCRFCD
HENDERSON EXECUTIVE AIRPORT        0.34 INCH        AWOS
NWS OFFICE                         0.33 INCH        NWS STAFF
TROPICANA & BUFFALO                0.33 INCH        COCORAHS
MOUNTAIN`S EDGE WEST               0.32 INCH        NWS EMPLOYEE
215 & EASTERN                      0.24 INCH        CCRFCD
SUMMERLIN CENTRE                   0.24 INCH        NWS EMPLOYEE
VALLEY VIEW & SAHARA               0.21 INCH        COCORAHS
DOWNTOWN LAS VEGAS                 0.20 INCH        CCRFCD
WARM SPRINGS & ARVILLE             0.20 INCH        COCORAHS
SUMMERLIN                          0.18 INCH        COCORAHS
NORTH LAS VEGAS AIRPORT            0.16 INCH        ASOS
TENAYA & WASHINGTON                0.16 INCH        COCORAHS
NELLIS AFB                         0.15 INCH        ASOS
OAKEY & JONES                      0.14 INCH        COCORAHS
EAST LAKE MEAD PARKWAY             0.13 INCH        COCORAHS
EQUESTRIAN & FOOTHILLS             0.12 INCH        CCRFCD
CRAIG & LOSEE                      0.10 INCH        CO-OP OBSERVER
ALIANTE                            0.04 INCH        CCRFCD
PROVIDENCE                         TRACE            COCORAHS

* WIND AT MCCARRAN INTERNATIONAL AIRPORT

AVERAGE WIND SPEED...10.9 MPH
DEPARTURE FROM NORMAL...+0.4 MPH
HIGHEST SUSTAINED WIND...NORTHWEST AT 39 MPH ON THE 14TH
HIGHEST GUST...NORTHWEST AT 55 MPH ON THE 14TH

* PRESSURE EXTREMES REDUCED TO SEA LEVEL

HIGHEST PRESSURE...30.22 INCHES ON THE 3RD
LOWEST PRESSURE...29.54 INCHES ON THE 25TH

* NOTABLE EVENTS DURING THE MONTH:

APRIL 2015 WAS THE COOLEST APRIL SINCE 2011 BASED ON AVERAGE
TEMPERATURE WHEN THE AVERAGE TEMPERATURE WAS 66.5 DEGREES. IT WAS
ALSO THE WETTEST APRIL SINCE 2004 WHEN 0.92 INCH FELL.

THERE WERE A TOTAL OF 3 DAYS WITH A HIGH TEMPERATURE OF 90 DEGREES
OR GREATER WHICH IS EXACTLY NORMAL. THIS WAS THE LOWEST APRIL TOTAL
SINCE 2011 WHEN THERE WERE 2 SUCH DAYS.

A STRONG COLD FRONT BLASTED THROUGH THE LAS VEGAS VALLEY ON THE
EVENING OF THE 14TH BRINGING A LARGE AMOUNT OF DUST WITH ACCOMPANIED
BY WIND GUSTS OF 50 TO 55 MPH. VISIBILITY WAS REDUCED AS LOW AS A
MILE AT THE NORTH LAS VEGAS AIRPORT AND NELLIS AIR FORCE BASE DUE TO
THE DUST. A TOTAL OF 11 FLIGHTS WERE DIVERTED AT MCCARRAN
INTERNATIONAL AIRPORT DUE TO THE WIND. THE WIND WAS STRONG ENOUGH TO
KNOCK DOWN A LARGE SIGN AT A SHOPPING MALL ON WEST SAHARA. IN
ADDITION, AT LEAST 5 LIGHT POLES FELL DOWN AND 6 LARGE TREES FELL
DOWN. ONE TREE FELL ON A CINDERBLOCK WALL AND KNOCKED THE WALL DOWN.
ANOTHER TREE FELL ON A CAR AND DAMAGED IT. ONE TREE ALSO FELL ON
POWER LINE NEAR OAKEY AND LAS VEGAS BOULEVARD. OVER 1000 NV ENERGY
CUSTOMERS LOST POWER.

THUNDERSTORMS ON THE EVENING OF THE 25TH PRODUCED PEA SIZE HAIL IN
DOWNTOWN LAS VEGAS AND ALSO DROPPED ENOUGH RAIN TO CAUSE MINOR
FLOODING NEAR MOUNTAIN VISTA AND HARMON.

...ELSEWHERE ACROSS THE MOJAVE DESERT AND SOUTHERN GREAT BASIN...

MOST AREAS SAW ABOVE NORMAL TEMPERATURES.

LOCATION               AVG. TEMP        DEPARTURE         RANK
                      APRIL 2015       FROM NORMAL
---------------------------------------------------------------------
BARSTOW-DAGGETT         66.6              +1.8        24TH WARMEST
BISHOP                  56.5              +2.0        22ND WARMEST
DEATH VALLEY            78.2              +1.9        29TH WARMEST
DESERT ROCK             60.9              +1.2        15TH WARMEST
KINGMAN                 58.2              -0.5        44TH COLDEST
MT CHARLESTON           43.0              +0.6        15TH COLDEST
NEEDLES                 73.7              +1.8        29TH WARMEST

TEMPERATURE EXTREMES ACROSS THE LAS VEGAS NATIONAL WEATHER SERVICE
AREA AT OFFICIAL WEATHER STATIONS.
---------------------------------------------------------------------
HIGHEST TEMPERATURE OF THE MONTH

IN CALIFORNIA...107 AT DEATH VALLEY ON THE 29TH
IN NEVADA...100 AT LAUGHLIN ON THE 30TH
IN ARIZONA...102 AT BULLHEAD CITY ON THE 30TH

LOWEST TEMPERATURE OF THE MONTH

IN CALIFORNIA...24 AT BISHOP ON THE 9TH
IN NEVADA...6 AT SPRING VALLEY STATE PARK ON THE 6TH
IN ARIZONA...23 AT PIPE SPRING NATIONAL MONUMENT ON THE 15TH

FOR MOST OF THE AREA APRIL WAS A VERY DRY MONTH WITH LITTLE
PRECIPITATION. THE EXCEPTION WAS ACROSS SOUTHERN PARTS OF CLARK AND
NYE COUNTIES AND SOUTHWESTERN MOHAVE COUNTY WHERE TOTALS WERE ABOVE
NORMAL. THE TOTAL OF 0.97 INCH MADE THIS THE SECOND WETTEST APRIL AT
LAKE HAVASU CITY, ARIZONA DATING BACK TO 1967. ONLY APRIL 1988 WAS
WETTER WITH 1.55 INCH. THE HIGHEST TOTAL AT AN OFFICIAL WEATHER
STATION FOR THE MONTH WAS 1.17 INCH AT SPRING VALLEY STATE PARK,
NEVADA. A NUMBER OF LOCATIONS REPORTED NO PRECIPITATION FOR THE
MONTH. THE LOWEST TOTALS WERE MAINLY ACROSS ESMERALDA, INYO AND
WESTERN SAN BERNARDINO COUNTIES WHERE THE ONGOING DROUGHT HAS BEEN
THE WORST.

BELOW ARE SOME TOTALS AND DEPARTURES FOR A FEW STATIONS AROUND THE
AREA.

LOCATION               MONTHLY          DEPARTURE
                        TOTAL          FROM NORMAL
---------------------------------------------------------------------
BARSTOW-DAGGETT         TRACE          -0.17 INCH
BISHOP                0.01 INCH        -0.25 INCH
DEATH VALLEY          0.00 INCH        -0.12 INCH
NEEDLES                 TRACE          -0.22 INCH
DESERT ROCK           0.10 INCH        -0.23 INCH
MT CHARLESTON         0.18 INCH        -0.83 INCH
KINGMAN               0.11 INCH        -0.30 INCH

SNOWFALL WAS ONCE AGAIN WELL BELOW AVERAGE FOR THE MONTH. ON THE
1ST, THE SNOWPACK IN THE SIERRA NEVADA IN CALIFORNIA STOOD AT A
RECORD LOW FOR THE DATE BASED ON DATA FROM CALIFORNIA`S DEPARTMENT
OF WATER RESOURCES. SNOWFALL FOR THE MONTH TOTALED 4 INCHES AT
ASPENDELL, CALIFORNIA AT 8500 FEET. MT CHARLESTON, NEVADA MEASURED
0.5 INCH OF SNOW AT THE CO-OP WEATHER STATION IN KYLE CANYON LOCATED
AT 7450 FEET. A TRACE OF SNOW WAS REPORTED IN LINCOLN COUNTY, NEVADA
AT PIOCHE AND RACHEL.

---------------------------------------------------------------------

NOTE...NORMALS USE THE PERIOD OF 1981-2010.

PERIOD OF RECORD FOR STATIONS:
LAS VEGAS (1937-PRESENT)              BISHOP (1943-PRESENT)
BARSTOW-DAGGETT (1943-PRESENT)        DEATH VALLEY (1911-PRESENT)
NEEDLES (1888-PRESENT)                DESERT ROCK (1977-PRESENT)
MT CHARLESTON (1980-PRESENT)          KINGMAN (1901-PRESENT)

THE ABOVE INFORMATION IS PRELIMINARY AND SUBJECT TO A FINAL REVIEW.
FOR OFFICIAL CERTIFIED DATA...CONTACT THE OFFICE OF NOAA`S NATIONAL
CENTERS FOR ENVIRONMENTAL INFORMATION (NCEI) LOCATED IN ASHEVILLE,
NORTH CAROLINA.

$$

STACHELSKI



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