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000
CXUS55 KBOI 020029
CLMBOI

CLIMATE REPORT...UPDATE
NATIONAL WEATHER SERVICE BOISE ID
628 PM MDT SUN JUL 1 2012

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

...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF JUNE 2012...

        ...A QUIET MONTH OVERALL WITH ONE EXCEPTION...

JUNE 2012 WAS A FAIRLY QUIET BUT DRY MONTH WITH NORMAL TEMPERATURES.
THE AVERAGE MONTHLY TEMPERATURE WAS 67.3 DEGREES WHICH CAME IN
ALMOST EXACTLY AVERAGE FOR THE MONTH. DAYTIME HIGHS WERE SLIGHTLY
ABOVE NORMAL BUT NIGHTTIME LOWS WERE ABOUT A DEGREE BELOW NORMAL.
JUNE FEATURED MANY COMFORTABLE NIGHTS WITH LOWS IN THE 40S AND 50S
WHILE HIGHS WERE MOSTLY IN THE 80S WITH A FEW 90S MIXED IN. ONE
DAY...THE 5TH WAS VERY CHILLY AND SHOWERY WITH THE HIGH ONLY
REACHING 57 DEGREES. NO TRIPLE DIGIT READINGS WERE RECORDED DURING
JUNE AND NO TEMPERATURE RECORDS WERE TIED OR BROKEN.

THE MOST PRONOUNCED ASPECT TO JUNE WAS THE OVERALL DRYNESS
THROUGHOUT THE MONTH. THE NINETEEN HUNDREDTHS OF AN INCH RECORDED IN
THE RAIN GAGE WAS A FULL HALF INCH BELOW THE NORMAL VALUE. SHOWERS
WERE FEW AND FAR BETWEEN AND ONLY THE FIRST WEEK HAD RAIN WHILE THE
LAST THREE WEEKS WERE COMPLETELY DRY. THE DRYNESS WAS THE DIRECT
RESULT OF A PERSISTENT WEDGE OF DRY AIR BETWEEN A TROUGH IN THE
PACIFIC NORTHWEST AND AN INTENSE HIGH PRESSURE RIDGE OVER THE
ROCKIES AND PLAINS. THE DRY CONDITIONS IN JUNE CONTRIBUTED TO
QUICKLY DRYING GRASS LAND FUELS AND SEVERAL BLM FIRES OCCURRED IN
AND AROUND THE BOISE AREA.

THE MOST IMPORTANT WEATHER OF THE MONTH WAS A HIGH WIND EVENT WHICH
OCCURRED ON THE EVENING OF THE 4TH. A STRONG COLD FRONT CROSSED THE
AREA ACCOMPANIED BY AN UNUSUALLY POWERFUL JETSTREAM. IN ADDITION...A
LINE OF SHOWERS AND THUNDERSTORMS CONTRIBUTED TO THE HIGH WINDS. THE
BOISE AIRPORT RECORDED A WIND GUST OF 60 MPH AS THE FRONT CROSSED
WITH A PROLONGED PERIOD OF HIGH WINDS IN THE RANGE OF 35 TO 50 MPH.
WIDESPREAD WIND DAMAGE WITH TREES AND DOWNED POWER LINES OCCURRED.
LATE IN THE EVENING MORE THAN 50,000 PEOPLE WERE WITHOUT POWER IN
THE TREASURE VALLEY AND MANY OF THESE WERE NOT RESTORED UNTIL THE
NEXT DAY. TEMPERATURES PLUMMETED BEHIND THE COLD FRONT FROM A HIGH
OF 93 DEGREES ON THE 4TH TO A CHILLY 57 DEGREE READING THE NEXT
DAY...AN UNBELIEVABLE 24 HOUR DROP OF 36 DEGREES.
.....................................................................

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1878 TO 2012

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
HIGHEST            97   06/30
LOWEST             37   06/06
AVG. MAXIMUM     82.0              81.3     0.7
AVG. MINIMUM     52.6              53.7    -1.1
MEAN             67.3              67.5    -0.2
DAYS MAX >= 90      7
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.41   1941
TOTALS           0.19              0.69   -0.50
DAYS >= .01         5
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.13   06/09 TO 06/09
                        06/08 TO 06/09
                        06/09 TO 06/09

DEGREE_DAYS
HEATING TOTAL      64                64       0       89
 SINCE 7/1       4974              5514    -540
COOLING TOTAL     140               139       1       75
 SINCE 1/1        199               183      16
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.8
RESULTANT WIND SPEED/DIRECTION   3/318
HIGHEST WIND SPEED/DIRECTION    41/280    DATE  06/04
HIGHEST GUST SPEED/DIRECTION    60/280    DATE  06/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM

AVERAGE RH (PERCENT)     40


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

$$