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303
CXUS55 KBOI 012104
CLMBOI

CLIMATE REPORT...EDITED TO ADD NARRATIVE
NATIONAL WEATHER SERVICE BOISE ID
305 PM MDT FRI AUG 1 2014

A TYPICAL JULY...HOT AND DRY

SEVEN OF THE TEN WARMEST JULYS IN BOISE OCCURRED SINCE THE TURN OF
THE CENTURY...AND JULY 2014 WAS AMONG THEM...RANKING NUMBER SIX.

IT WAS 90 OR ABOVE ON 28 DAYS...AND 100 OR ABOVE ON SEVEN DAYS. THE
TEMPERATURE FELL NO LOWER THAN 70 ON EIGHT DAYS. REMARKABLY NO NEW
TEMPERATURE RECORDS WERE SET.

THE HEAT CAN BE BLAMED ON A PERSISTENT VERY WARM UPPER LEVEL RIDGE
OVER WESTERN NORTH AMERICA.

SMOKY SKIES ACCOMPANIED THE HEAT ON SEVERAL DAYS DURING THE LAST
HALF OF THE MONTH.

THE HIGH FAILED TO REACH 80 ON ONLY ONE DAY. DURING THE NIGHT OF
JULY 23 A NORTH PACIFIC WEATHER SYSTEM PUSHED INLAND ALONG THE
CANADIAN BORDER...DRAGGING A DRY COLD FRONT ACROSS THE BOISE AREA.
FOLLOWING THE FRONT THE TEMPERATURE ON THE 24TH MAXED OUT AT ONLY 77
DEGREES...16 DEGREES BELOW NORMAL.

ON THE HOTTEST DAYS THE AIR WAS USUALLY DRY. AT THE NATIONAL WEATHER
SERVICE HUMIDITY AVERAGED 18 PERCENT AT 2 PM MDT. AN EXCEPTION WAS
JULY 21. MONSOON MOISTURE BROUGHT CLOUDS AND HIGHER HUMIDITIES THAN
WE NORMALLY SEE IN BOISE DURING THE SUMMER. THE HUMIDITY REMAINED
ABOVE 40 PERCENT...AND THE HIGH TEMPERATURE WAS ONLY 83.

MEASURABLE PRECIPITATION FELL AT THE AIRPORT ON TWO DAYS...TOTALING
ONLY .08 INCH. DRY JULYS ARE NOT UNUSUAL IN BOISE. AIRPORT RECORDS
SHOW FIFTY PERCENT OF JULYS HAD .12 INCH OR LESS.

SUMMER PRECIPITATION USUALLY ACCOMPANIES ISOLATED CONVECTION
DEVELOPING FROM MONSOON MOISTURE AND ENHANCED BY LIFTING OVER THE
MOUNTAINS. SO ON ANY GIVEN DAY WHEN THUNDERSTORMS OCCUR...MOST RAIN
GAUGES WILL BE MISSED...WHILE LOCALIZED HEAVY RAIN CAN FALL...
ESPECIALLY IN THE MOUNTAINS. THAT HAPPENED SEVERAL TIMES DURING JULY
2014. FOR EXAMPLE ON JULY 31 IDAHO CITY...ONLY 36 MILES FROM
BOISE...MEASURED 1.58 INCHES OF RAIN.

OUTFLOW FROM THIS STORM PRODUCED A WIND GUST OF 41 MPH AT THE
AIRPORT...THE STRONGEST WIND RECORDED DURING THE MONTH.

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

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

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           104   07/13
LOWEST             52   07/25
AVG. MAXIMUM     96.1              91.2     4.9
AVG. MINIMUM     65.9              60.4     5.5
MEAN             81.0              75.8     5.2
DAYS MAX >= 90     28
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.01   1913
TOTALS           0.08              0.33   -0.25
DAYS >= .01         2
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.06   07/20 TO 07/20

DEGREE_DAYS
HEATING TOTAL       0                 8      -8        0
 SINCE 7/1          0                 8      -8
COOLING TOTAL     504               342     162      516
 SINCE 1/1        640               525     115
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.6
RESULTANT WIND SPEED/DIRECTION   2/305
HIGHEST WIND SPEED/DIRECTION    32/070    DATE  07/31
HIGHEST GUST SPEED/DIRECTION    41/080    DATE  07/31

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM

AVERAGE RH (PERCENT)     31


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

$$




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