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000
CXUS55 KBYZ 010941
CLMBIL


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
338 AM MDT WED MAY 1 2013

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

...THE BILLINGS MT CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1934 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            77   04/27
LOWEST             15   04/15
                        04/10
AVG. MAXIMUM     53.0              57.6    -4.6
AVG. MINIMUM     30.5              34.7    -4.2
MEAN             41.7              46.2    -4.5
DAYS MAX >= 90      0
DAYS MAX <= 32      3
DAYS MIN <= 32     16
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
TOTALS           1.02              1.66   -0.64
DAYS >= .01        10
DAYS >= .10         4
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.47   04/07 TO 04/08

SNOWFALL (INCHES)
TOTALS            5.6               8.3    -2.7
SINCE 7/1        40.4              53.0   -12.6
SNOWDEPTH AVG.      0
DAYS >= TRACE      13
DAYS >= 1.0         2
GREATEST
 SNOW DEPTH         2   04/09
 24 HR TOTAL      3.0   04/08 TO 04/08

DEGREE_DAYS
HEATING TOTAL     689               567     122
 SINCE 7/1       6092              6377    -285
COOLING TOTAL       0                 1      -1
 SINCE 1/1          0                 1      -1
.................................................

WIND (MPH)
AVERAGE WIND SPEED              11.2
HIGHEST WIND SPEED/DIRECTION    40/300    DATE  04/29
HIGHEST GUST SPEED/DIRECTION    56/320    DATE  04/29

AVERAGE RH (PERCENT)     57

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW               11     SLEET                      1
FOG                      12     FOG W/VIS <= 1/4 MILE      0
HAZE                      4

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

&&

...APRIL 2013 MONTH IN REVIEW FOR BILLINGS...

BELOW IS A SUMMARY OF THE TEMPERATURE...PRECIPITATION...AND WIND
STATISTICS FOR BILLINGS FOR APRIL 2013. ALL TEMPERATURES ARE IN
DEGREES FAHRENHEIT AND ALL PRECIPITATION AMOUNTS ARE IN INCHES. NORMALS
ARE 30 YEAR AVERAGES CALCULATED FROM 1981 TO 2010. MONTHLY RANKINGS
FOR PRECIPITATION...SNOWFALL...AND TEMPERATURES USE A PERIOD OF RECORD
THAT STARTED IN AUGUST 1934 AT THE BILLINGS AIRPORT. MONTHLY RANKINGS
FOR WIND USE A PERIOD OF RECORD THAT STARTED IN 1984.

NUMBERS DENOTED WITH AN * IS MISSING DATA IN THE CALCULATION.

...BILLINGS MONTHLY PRECIPITATION...

 MONTH   2013 VALUES  NORMALS    DEPARTURE  RANKING

APRIL        1.02     1.66       -0.64      24TH DRIEST OUT OF 79 YEARS
                                            (RECORD DRIEST WAS 0.06 IN 1962)
                                            (DRIEST SINCE 0.64 IN 2012)

...BILLINGS APRIL 2013 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

NONE

...BILLINGS MONTHLY SNOWFALL...

 MONTH   2013 VALUES  NORMALS    DEPARTURE  RANKING

APRIL         5.6       8.3       -2.7      TIED FOR THE 36TH LEAST SNOWIEST OUT OF 79 YEARS
                                            (RECORD LEAST SNOWIEST WAS 0.0 TIED IN 1949)
                                            (LEAST SNOWIEST SINCE 0.4 IN 2012)

...BILLINGS APRIL 2013 BROKEN OR TIED DAILY SNOWFALL RECORDS...

NONE

...BILLINGS AVERAGE TEMPERATURES...

 MONTH   2013 VALUES  NORMALS   DEPARTURE  RANKING

APRIL        41.8      46.2      -4.4      12TH COLDEST OUT OF 79 YEARS
                                           (RECORD COLDEST WAS 37.1 IN 1975)
                                           (COLDEST SINCE 40.8 IN 2002)

...BILLINGS AVERAGE HIGH TEMPERATURES...

 MONTH   2013 VALUES  NORMALS   DEPARTURE  RANKING

APRIL        53.0      57.6      -4.6      14TH COLDEST OUT OF 79 YEARS
                                           (RECORD COLDEST WAS 45.7 IN 1975)
                                           (COLDEST SINCE 52.8 IN 2011)

...BILLINGS APRIL 2013 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...BILLINGS APRIL 2013 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

33 ON APRIL 15 (OLD RECORD 35 IN 1970)
30 ON APRIL 16 (OLD RECORD 38 IN 1940)
33 ON APRIL 17 (OLD RECORD 34 IN 1966)
34 ON APRIL 22 (OLD RECORD 36 IN 2011)

...BILLINGS AVERAGE LOW TEMPERATURES...

 MONTH   2013 VALUES  NORMALS   DEPARTURE  RANKING

APRIL        30.5      34.7      -4.2      12TH COLDEST OUT OF 79 YEARS
                                           (RECORD COLDEST WAS 28.5 TIED IN 2002)
                                           (COLDEST SINCE 28.5 IN 2002)

...BILLINGS APRIL 2013 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

NONE

...BILLINGS APRIL 2013 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

15 ON APRIL 15 (OLD RECORD 17 IN 1986)
16 ON APRIL 17 (OLD RECORD 17 IN 1964)
20 ON APRIL 23 (TIED RECORD IN 1967)

...BILLINGS MONTHLY WIND AVERAGES...

 MONTH   2013 VALUES  NORMALS    DEPARTURE  RANKING

APRIL        11.2      10.5       +0.7      ON THE MEDIAN OUT OF 64 YEARS
                                            (WINDIEST 13.5-1955/LEAST WINDIEST 8.8-1983)

$$