Climatological Report (Monthly)
Issued by NWS Boise, ID

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CXUS55 KBOI 011734
CLMBOI

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOISE ID
1035 AM MST THU DEC 1 2016

NOVEMBER WAS THE SECOND WARMEST AND SECOND DRIEST IN 76 YEARS OF
AIRPORT RECORDS.

DURING MOST OF THE MONTH THE INTERMOUNTAIN REGION WAS DOMINATED BY A
WARM UPPER-LEVEL RIDGE WHICH KEPT TEMPERATURES ABOVE NORMAL. PACIFIC
WEATHER SYSTEMS WEAKENED AS THEY APPROACHED THE RIDGE, SO THEY
BROUGHT LITTLE OF ANY PRECIPITATION TO THE TREASURE VALLEY.

STARTING ON THE 15TH, A SERIES OF DEEP UPPER-LEVEL TROUGHS CROSSED
THE REGION, BUT THE RIDGE ALWAYS MANAGED TO REBOUND BETWEEN THEM.

ON THE 26TH AN EVEN DEEPER TROUGH CROSSED THE WESTERN U.S. ON THE
27TH IT WAS CENTERED OVER THE NORTHERN PLAINS STATES, LEAVING BOISE
UNDER NORTHWEST FLOW ALOFT BETWEEN THE TROUGH AND A HIGH PRESSURE
RIDGE OVER THE NORTHEASTERN PACIFIC OCEAN.

THIS PATTERN CHANGE PAVED THE WAY FOR A WINTER-LIKE WEATHER SYSTEM
TO DROP IN FROM THE GULF OF ALASKA. THIS STORM BROUGHT BOISE THE
FIRST TRACE OF SNOW OF THE SEASON, WHICH MELTED AS IT FELL. THE
AVERAGE DATE OF THE FIRST TRACE OR MORE OF SNOW IS NOVEMBER 22.

A WEAKER SYSTEM FROM THE GULF OF ALASKA MOVED INTO SOUTHWEST IDAHO
IN THE 30TH. LIKE ITS PREDECESSOR, IT BROUGHT A MIX OF RAIN AND
SNOW, BUT PRECIPITATION AMOUNTS IN THE VALLEY AMOUNTS WERE LIGHT.

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

...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1875 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
HIGHEST            69   11/11
LOWEST             26   11/18
AVG. MAXIMUM     56.1              48.2     7.9
AVG. MINIMUM     37.5              31.9     5.6
MEAN             46.8              40.0     6.8
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      9
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.43   1874
TOTALS           0.23              1.35   -1.12
DAYS >= .01         3
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.15   11/28 TO 11/28

SNOWFALL (INCHES)
TOTALS              T
SINCE 7/1           T
GREATEST
 SNOW DEPTH         0   0
 24 HR TOTAL        T   11/30 TO 11/30

DEGREE_DAYS
HEATING TOTAL     540               748    -208      827
 SINCE 7/1        905              1254    -349
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1001               942      59
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.8
RESULTANT WIND SPEED/DIRECTION   3/142
HIGHEST WIND SPEED/DIRECTION    36/300    DATE  11/20
HIGHEST GUST SPEED/DIRECTION    43/290    DATE  11/20

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM

AVERAGE RH (PERCENT)     60


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

$$


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