Climatological Report (Monthly)
Issued by NWS Billings, MT

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000
CXUS55 KBYZ 011219
CLMBIL


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
613 AM MDT MON MAY 1 2017

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

...THE BILLINGS MT CLIMATE SUMMARY FOR THE MONTH OF APRIL 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1934 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            80   04/13
LOWEST             29   04/04
AVG. MAXIMUM     58.0              57.6     0.4
AVG. MINIMUM     37.3              34.7     2.6
MEAN             47.6              46.2     1.4
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      5
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
TOTALS           3.34              1.66    1.68
DAYS >= .01        11
DAYS >= .10         5
DAYS >= .50         3
DAYS >= 1.00        1
GREATEST
 24 HR. TOTAL    1.26   04/09 TO 04/09

SNOWFALL (INCHES)
TOTALS            3.4               8.3    -4.9
SINCE 7/1        74.1              53.0    21.1
SNOWDEPTH AVG.      0
DAYS >= TRACE       5
DAYS >= 1.0         1
GREATEST
 SNOW DEPTH         1   04/10
 24 HR TOTAL      3.3   04/09 TO 04/09

DEGREE_DAYS
HEATING TOTAL     514               567     -53
 SINCE 7/1       6317              6377     -60
COOLING TOTAL       0                 1      -1
 SINCE 1/1          0                 1      -1
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.1
HIGHEST WIND SPEED/DIRECTION    44/320    DATE  04/23
HIGHEST GUST SPEED/DIRECTION    52/320    DATE  04/23

AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       6
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW                3     SLEET                      1
FOG                      13     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

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

&&

...APRIL 2017 MONTH IN REVIEW FOR BILLINGS...

BELOW IS A SUMMARY OF THE TEMPERATURE...PRECIPITATION...AND WIND
STATISTICS FOR BILLINGS FOR APRIL 2017. 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   2017 VALUES  NORMALS    DEPARTURE  RANKING

APRIL        3.34     1.66       +1.68      7TH WETTEST OUT OF 83 YEARS
                                            (RECORD WETTEST WAS 4.42 IN 1955)
                                            (WETTEST SINCE 3.87 IN 1991)

...BILLINGS APRIL 2017 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

1.26 ON APRIL  9 (OLD RECORD 0.36 IN 1940)

...BILLINGS MONTHLY SNOWFALL...

 MONTH   2017 VALUES  NORMALS    DEPARTURE  RANKING

APRIL         3.4       8.3       -4.9      TIED FOR THE 28TH LEAST SNOWIEST OUT OF 83 YEARS
                                            (RECORD LEAST SNOWIEST WAS 0.0 TIED IN 1949)
                                            (LEAST SNOWIEST SINCE 1.8 IN 2016)

...BILLINGS APRIL 2017 BROKEN OR TIED DAILY SNOWFALL RECORDS...

NONE

...BILLINGS AVERAGE TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

APRIL        47.7      46.2      +1.5      TIED FOR THE 24TH WARMEST OUT OF 83 YEARS
                                           (RECORD WARMEST WAS 54.6 IN 1980)
                                           (WARMEST SINCE 49.6 IN 2016)

...BILLINGS AVERAGE HIGH TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

APRIL        58.0      57.6      +0.4      34TH WARMEST OUT OF 83 YEARS
                                           (RECORD WARMEST WAS 69.0 IN 1987)
                                           (WARMEST SINCE 60.3 IN 2016)

...BILLINGS APRIL 2017 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

80 ON APRIL 13 (OLD RECORD 78 IN 2002)

...BILLINGS APRIL 2017 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...BILLINGS AVERAGE LOW TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

APRIL        37.3      34.7      +2.6      13TH WARMEST OUT OF 83 YEARS
                                           (RECORD WARMEST WAS 40.8 IN 1980)
                                           (WARMEST SINCE 38.8 IN 2016)

...BILLINGS APRIL 2017 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

48 ON APRIL  7 (TIED RECORD IN 1996)

...BILLINGS APRIL 2017 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

NONE

...BILLINGS MONTHLY WIND AVERAGES...

 MONTH   2017 VALUES  NORMALS    DEPARTURE  RANKING

APRIL        10.2      10.5       -0.3      TIED FOR THE 14TH LEAST WINDIEST OUT OF 68 YEARS
                                            (RECORD LEAST WINDIEST WAS 8.8 IN 1983)
                                            (LEAST WINDIEST SINCE 10.2 IN 2015)

$$





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