Climatological Report (Monthly)
Issued by NWS Boise, ID

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CXUS55 KBOI 011950 CCA
CLMBOI

CLIMATE REPORT...REISSUED TO ADD NARRATIVE
NATIONAL WEATHER SERVICE BOISE ID
150 PM MDT MON SEP 1 2014

...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2014...

AUGUST WAS FAR FROM TYPICAL ACROSS SOUTHWEST IDAHO...ALTHOUGH AT BOISE
TEMPERATURES AND PRECIPITATION WERE VERY CLOSE TO NORMAL.

CLOSE BY...NOTABLY IN THE MAGIC VALLEY AND THE CENTRAL IDAHO
MOUNTAINS...AUGUST WAS ANOMALOUSLY WET.

BOTH TWIN FALLS AND JEROME HAD THEIR WETTEST AUGUST ON RECORD. IN
FACT THE 5.57 INCHES OF RAIN AT TWIN FALLS EXCEEDED ALL MONTHLY
RECORDS FOR THE MAGIC VALLEY.

FOR THE FIRST 12 DAYS OF AUGUST THE UPPER LEVEL RIDGE PERSISTING
FROM JULY CONTINUED TO DOMINATE THE INTERMOUNTAIN REGION. NORTH
PACIFIC WEATHER SYSTEMS WERE DIVERTED INTO CANADA...SO THE ONLY RAIN
WAS FROM ISOLATED MONSOON THUNDERSTORMS. AS IS NORMAL...THE WETTER
STORMS STAYED EAST AND SOUTH OF BOISE WITH THE AIRPORT RECEIVING
ONLY TRACES OF RAIN.

AUGUST 2014 WAS A MONTH OF CHANGEABLE WEATHER.

ON THE 13TH AN UPPER LEVEL TROUGH...WHICH HAD BROKEN AWAY FROM THE
ALEUTIAN LOW...MOVED INLAND OVER THE PACIFIC NORTHWEST...BRINGING
THE AIRPORT ITS FIRST MEASURABLE RAIN SINCE JULY 22.

BY THE 14TH THE TROUGH WAS CENTERED OVER WASHINGTON AND OREGON.
THUNDERSTORMS MOVING NORTH AROUND THE EAST SIDE OF THE TROUGH
BROUGHT MODERATE RAIN...AROUND HALF AN INCH...TO PARTS OF WEST
BOISE...MERIDIAN...AND EAGLE. BUT THE STORMS MISSED THE AIRPORT
WHERE ONLY TRACES FELL.

ON THE 16TH AND 17TH THE TROUGH WAS PUSHED NORTH INTO CANADA BY THE
REBUILDING RIDGE.

BUT A MAJOR PATTERN SHIFT WAS IN THE WORKS.

BY THE 20TH THE RIDGE HAD RELOCATED TO EAST OF THE ROCKIES WHILE TO
OUR WEST A SEPARATE RIDGE HAD BEGUN TO DOMINATE THE NORTHEAST
PACIFIC.

THIS PUT THE NORTHWEST U.S. UNDER A TROUGH WHICH WAS REINFORCED BY
COOL AIR FROM WESTERN CANADA...GUARANTEEING A WEEK OF BELOW NORMAL
TEMPERATURES AND EVEN SOME LIGHT BUT MEASURABLE PRECIPITATION ON THE
24TH AND 25TH.

HOT SUMMER WEATHER BRIEFLY RETURNED FOR THE 27TH THROUGH THE 29TH AS
A RIDGE OVER CALIFORNIA ATTEMPTED TO BUILD NORTH.

BUT BY THE 30TH ANOTHER TROUGH...THIS TIME FROM THE GULF OF
ALASKA...ALL BUT OBLITERATED THE RIDGE AND BROUGHT MORE UNSEASONABLY
COOL WEATHER AND A FEW LIGHT SHOWERS.

ON THE 30TH THE STRONGEST WIND GUST OF THE MONTH...47 MPH FROM THE
NORTHWEST...WAS MEASURED AS THIS SYSTEM ARRIVED.

.............................................................
CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1878 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
HIGHEST           102   08/11
LOWEST             48   08/31
AVG. MAXIMUM     88.6              89.7    -1.1
AVG. MINIMUM     62.9              59.6     3.3
MEAN             75.7              74.7     1.0
DAYS MAX >= 90     16
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.37   1968
TOTALS           0.16              0.24   -0.08
DAYS >= .01         5
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.08   08/23 TO 08/24
                        08/24 TO 08/24
                        08/24 TO 08/25

DEGREE_DAYS
HEATING TOTAL       4                10      -6        0
 SINCE 7/1          4                18     -14
COOLING TOTAL     343               309      34      418
 SINCE 1/1        983               834     149
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.7
RESULTANT WIND SPEED/DIRECTION   1/141
HIGHEST WIND SPEED/DIRECTION    36/320    DATE  08/30
HIGHEST GUST SPEED/DIRECTION    47/320    DATE  08/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM

AVERAGE RH (PERCENT)     42


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

$$


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