Climatological Report (Annual)
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000
CXUS55 KVEF 052341 AAA
CLALAS

CLIMATE REPORT
NATIONAL WEATHER SERVICE LAS VEGAS, NV
340 PM PST SAT JAN 2 2016

...................................

...THE LAS VEGAS NV CLIMATE SUMMARY FOR THE YEAR OF 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1937 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             117   06/30/2013
                        07/19/2005
                        07/24/1942
 LOW                8   01/13/1963
                        01/25/1937
HIGHEST           113   06/27       113       0      112  07/23
                        06/20                             07/01
                                                          07/13
LOWEST             29   12/27        27       2       30  12/29
                        01/02
AVG. MAXIMUM     82.2              80.1     2.1     82.6
AVG. MINIMUM     61.3              58.7     2.6     61.3
MEAN             71.8              69.4     2.4     72.0
DAYS MAX >= 90    142             131.3    10.7      143
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32     10               7.5     2.5        2
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.72   1941
 MINIMUM         0.56   1953
TOTALS           4.49              4.19    0.30     1.81
DAILY AVG.          T              0.01   -0.01        T
DAYS >= .01        36              26.5     9.5       19
DAYS >= .10        14              11.2     2.8        5
DAYS >= .50         2               2.5    -0.5        0
DAYS >= 1.00        0               0.2    -0.2        0
GREATEST
 24 HR. TOTAL    0.62   10/05 TO 10/05
 STORM TOTAL     0.62
 (MM/DD(HH))  10/05(02) TO 10/05(23)

SNOWFALL (INCHES)
RECORDS
 TOTAL           16.7   1949
 24 HR TOTAL      9.0   01/04/1974 TO 01/05/1974
 SNOW DEPTH         8   01/05/1974
TOTALS              T               0.3    -0.3        T
 LIQUID EQUIV       T              0.00    0.00       MM
SINCE 7/1           T               0.2    -0.2        T
 LIQUID 7/1         T              0.00      MM       MM
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       1               0.2     0.8        1
DAYS >= 1.0         0               0.1    -0.1        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL        T   12/25 TO 12/25

 STORM TOTAL        T
 (MM/DD(HH))  12/25(00) TO 12/25(02)          1

DEGREE_DAYS
HEATING TOTAL    1491              1951    -460     1306
 SINCE 7/1        867               847      20      597
COOLING TOTAL    4069              3568     501     3970
 SINCE 1/1       4069              3568     501     3970

FREEZE DATES
RECORD
 EARLIEST     10/21/1949
 LATEST       04/12/1967
EARLIEST                        11/25
LATEST                          02/28
..................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
RESULTANT WIND SPEED/DIRECTION   4/198
HIGHEST WIND SPEED/DIRECTION    39/330    DATE  04/14
HIGHEST GUST SPEED/DIRECTION    55/320    DATE  06/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR          190
NUMBER OF DAYS PC            145
NUMBER OF DAYS CLOUDY         30

AVERAGE RH (PERCENT)     28

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             26     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                      12
LIGHT RAIN               59     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                1     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      0
HAZE                      9


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

...A WET AND VERY WARM YEAR FOR LAS VEGAS...

FOLLOWING IN THE FOOTSTEPS OF 2014 WARM WEATHER KEPT ON GOING INTO
FIRST QUARTER OF 2015. ALTHOUGH WELL ABOVE NORMAL TEMPERATURES KEPT
ON GOING AT TIMES THROUGHOUT 2015, THE FINAL TWO MONTHS OF THE YEAR
FINALLY SAW A SIGNIFICANT ENOUGH PATTERN CHANGE TO PUSH 2015 INTO A
FIRM SECOND PLACE FOR THE WARMEST AVERAGE ANNUAL TEMPERATURE ON
RECORD. AS A RESULT, THE AVERAGE TEMPERATURE OF 71.8 DEGREES RANKED
JUST 0.2 DEGREE SHY OF THE 72.0 AVERAGE ANNUAL TEMPERATURE SET IN
2014 THAT REMAINS THE CURRENT RECORD HOLDER FOR THE WARMEST YEAR
EVER. STILL IT WAS IMPRESSIVE TO WATCH A YEAR THAT HAD 4 MONTHS
FINISH AS THE WARMEST EVER SLIP INTO SECOND PLACE DUE TO THE END OF
YEAR CHILL.

THE WARM WEATHER IN 2015 IN LAS VEGAS WAS A COMBINATION OF BOTH VERY
WARM HIGH AND LOW TEMPERATURES. THE AVERAGE MAXIMUM TEMPERATURE OF
82.2 DEGREES WAS 2.1 DEGREES ABOVE NORMAL AND RANKED AS THE 7TH
HIGHEST SUCH AVERAGE ON RECORD DATING BACK TO 1937. THE AVERAGE
MINIMUM TEMPERATURE OF 61.3 DEGREES WAS 2.6 DEGREES ABOVE NORMAL AND
RANKED SECOND TO THE 61.4 DEGREES SET IN 2014.

HERE IS A BREAKDOWN OF THE AVERAGE TEMPERATURE BY MONTH AND THE RANK:

MONTH           AVERAGE TEMPERATURE  DEPARTURE       RANK
---------------------------------------------------------------------
JANUARY         52.9                  +4.2            3RD WARMEST
FEBRUARY        60.0                  +7.1            WARMEST EVER
MARCH           66.7                  +6.8            WARMEST EVER
APRIL           68.8                  +1.6            13TH WARMEST
MAY             74.3                  -3.0            34TH COLDEST
JUNE            91.9                  +5.2            WARMEST EVER
JULY            90.6                  -1.9            40TH COLDEST
AUGUST          92.9                  +2.3            4TH WARMEST
SEPTEMBER       87.3                  +4.7            WARMEST EVER
OCTOBER         74.2                  +4.7            4TH WARMEST
NOVEMBER        54.3                  -2.1            37TH COLDEST
DECEMBER        47.2                  -0.5            47TH COLDEST

THE HIGHEST TEMPERATURE OF THE YEAR WAS 113 DEGREES SET ON JUNE 20TH
AND AGAIN ON JUNE 27TH. THERE WERE A TOTAL OF 87 TRIPLE DIGIT HIGH
TEMPERATURES IN 2015 WHICH WAS 17 DAYS ABOVE NORMAL AND THE HIGHEST
ANNUAL TOTAL SINCE 2007 WHEN THERE WERE 88 SUCH DAYS. THE COLDEST
HIGH TEMPERATURE OF THE YEAR WAS 46 DEGREES ON NEW YEAR`S DAY AND
AGAIN ON DECEMBER 27TH.

THE LOWEST TEMPERATURE OF THE YEAR WAS 29 DEGREES ON JANUARY 2ND AND
AGAIN ON DECEMBER 27TH. THERE WERE A TOTAL OF 10 DAYS WITH LOWS OF
32 DEGREES OR BELOW. 5 OF THOSE DAYS TOOK PLACE IN DECEMBER. THERE
WERE 2 DAYS IN NOVEMBER WHICH MARKED THE FIRST SUCH TIME IN THAT
MONTH SINCE 2010. BY CONTRAST THE WARMEST LOW TEMPERATURE OF THE
YEAR WAS 93 DEGREES ON JUNE 30TH. THIS SET A NEW ALL-TIME RECORD
HIGH FOR THE MONTH OF JUNE. JUNE 2015 HAD 3 DAYS WITH A MINIMUM
TEMPERATURE IN THE 90S. PRIOR TO THIS JUNE, LAS VEGAS HAS NEVER HAD
A MINIMUM TEMPERATURE IN THE 90S IN THE MONTH OF JUNE. THE PREVIOUS
JUNE RECORD WARMEST MINIMUM TEMPERATURE WAS 89 DEGREES LAST SET ON
JUNE 30, 2013. THERE WERE 4 DAYS IN 2015 WITH A LOW IN THE 90S AND
64 DAYS WITH A LOW IN THE 80S. A RECORD 136 DAYS HAD A LOW IN THE
70S WHICH BROKE THE PREVIOUS YEARLY RECORD OF 135 DAYS SET IN 2012.

A TRACE OR MORE OF PRECIPITATION FELL ON 59 DAYS AT MCCARRAN
INTERNATIONAL AIRPORT IN 2015 AND TOTALED 4.49 INCHES. THIS WAS 0.30
INCH ABOVE NORMAL AND ENOUGH TO RANK 2015 AS THE 31ST WETTEST YEAR
EVER SINCE 1937. THE TOTAL OF 59 DAYS WITH A TRACE OR MORE OF
PRECIPITATION WAS THE HIGHEST YEARLY TOTAL SINCE 2010 WHEN THERE
WERE 63 SUCH DAYS.

YEARLY PRECIPITATION TOTALS WERE HIGHEST ON THE WEST-CENTRAL AND
UPPER SOUTHWEST PARTS OF THE VALLEY DUE TO LOCALIZED HEAVY RAINFALL
THAT FELL DURING THUNDERSTORMS EITHER IN THE MONSOON SEASON OR IN
OCTOBER. THE LOWEST TOTALS WERE ALONG THE FAR NORTHERN EDGE OF THE
VALLEY. BELOW ARE SOME TOTALS FOR SELECTED LOCATIONS IN THE LAS
VEGAS VALLEY:

LOCATION                        TOTAL           SOURCE
---------------------------------------------------------------------
NORTHWEST SUMMERLIN             8.15 INCHES     CCRFCD
TROPICANA & BUFFALO             7.47 INCHES     COCORAHS
SUMMERLIN CENTRE                6.86 INCHES     NWS EMPLOYEE
RAINBOW & DESERT INN            6.74 INCHES     CCRFCD
215 & TOWN CENTRE               6.54 INCHES     CCRFCD
OAKEY & JONES                   5.97 INCHES     COCORAHS
ANTHEM                          5.24 INCHES     CCRFCD
EAST LAKE MEAD PARKWAY          5.23 INCHES     COCORAHS
VALLEY VIEW & SAHARA            5.22 INCHES     COCORAHS
WIGWAM & VALLE VERDE            5.08 INCHES     RETIRED NWS EMPLOYEE
HENDERSON EXECUTIVE AIRPORT     4.88 INCHES     AWSS
NWS OFFICE                      4.78 INCHES     NWS STAFF
DOWNTOWN LAS VEGAS              4.76 INCHES     CCRFCD
TENAYA & WASHINGTON             4.66 INCHES     COCORAHS
LONE MOUNTAIN                   4.57 INCHES     CCRFCD
215 & EASTERN                   4.33 INCHES     CCRFCD
EQUESTRIAN & FOOTHILLS          4.21 INCHES     CCRFCD
LAKE LAS VEGAS                  3.98 INCHES     CCRFCD
LAS VEGAS WASH AT NELLIS        3.66 INCHES     CCRFCD
MOUNTAIN`S EDGE                 3.66 INCHES     CCRFCD
CRAIG & LOSEE                   3.56 INCHES     CO-OP OBSERVER
NELLIS AFB                      3.50 INCHES     ASOS
PROVIDENCE                      3.41 INCHES     COCORAHS
NORTH LAS VEGAS AIRPORT         3.19 INCHES     ASOS
CENTENNIAL HILLS                3.15 INCHES     CCRFCD
ALIANTE                         2.36 INCHES     CCRFCD
NORTH DECATUR                   2.01 INCHES     CCRFCD

THERE WERE TWO SIGNIFICANT SNOW EVENTS IN THE LAS VEGAS VALLEY IN
2015. THE FIRST TOOK PLACE ON THE MORNING OF FEBRUARY 23RD WHEN RAIN
CHANGED OVER TO SNOW ON THE WEST AND FAR SOUTHERN SIDES OF THE
VALLEY. SNOW WAS OBSERVED AS LOW AS ROUGHLY 2500 FEET WITH
ACCUMULATING SNOW NOTED AS LOW AS 2700 FEET. AS MUCH AS 2 INCHES OF
SNOW FELL IN SUMMERLIN WEST WITH A HALF AN INCH REPORTED IN
MOUNTAIN`S EDGE. THE SECOND SIGNIFICANT SNOW EVENT TOOK PLACE ON THE
MORNING OF CHRISTMAS DAY WHEN RAIN MIXED WITH OR CHANGED OVER TO ALL
SNOW AS A STRONG COLD FRONT PRESSED SOUTH ACROSS THE LAS VEGAS
VALLEY. SNOW WAS REPORTED IN ALL BUT THE FAR EAST SIDE OF THE
VALLEY. SNOW MIXED WITH RAIN AT MCCARRAN INTERNATIONAL AIRPORT AND
AT THE NATIONAL WEATHER SERVICE OFFICE BUT DID NOT ACCUMULATE. A
LIGHT COATING WAS OBSERVED IN THE FAR NORTHWEST PART OF THE VALLEY
IN THE PROVIDENCE AREA AS WELL AS IN ANTHEM. IN ANTHEM, SNOW WAS
STILL ON THE GROUND JUST AFTER SUNRISE.

THERE WERE A RECORD TYING 26 DAYS WITH THUNDER REPORTED AT MCCARRAN
INTERNATIONAL AIRPORT WHICH TIES THE HIGHEST YEARLY RECORD LAST SET
IN 1938.

THERE WERE A TOTAL OF 33 HEAT-RELATED DEATHS, BOTH DIRECT AND
INDIRECT, FOR THE YEAR IN THE LAS VEGAS VALLEY AND 19 HEAT-RELATED
INJURIES. A TOTAL OF 60 INJURIES WERE REPORTED DUE TO HEAVY RAIN AND
ALL WERE RELATED TO ACCIDENTS INVOLVING VEHICLES ON WET ROADS.
$$

STACHELSKI


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