504
CXUS55 KGGW 012150
CLMGGW
CLIMATE REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
250 PM MST SUN NOV 1 2009
...............................
..THE GLASGOW CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2009
CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1893 TO 2009
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
............................................................
TEMPERATURE (F)
RECORD
HIGH 96 10/04/1943
LOW -8 10/19/1905
HIGHEST 73 10/17 82 10/03
10/02
LOWEST 15 10/09 14 10/27
AVG. MAXIMUM 47.6 57.1 -9.5 57.9
AVG. MINIMUM 30.4 33.0 -2.6 32.0
MEAN 39.0 45.0 -6.0 45.0
DAYS MAX >= 90 0 0
DAYS MAX <= 32 4 1
DAYS MIN <= 32 19 18
DAYS MIN <= 0 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.41 1924
MINIMUM T 1965
TOTALS 0.83 0.71 0.12 1.29
DAILY AVG. 0.03 0.02 0.01 0.04
DAYS >= .01 11 8
DAYS >= .10 3 4
DAYS >= .50 0 1
DAYS >= 1.00 0 0
GREATEST
24 HR. TOTAL 0.32 10/19 TO 10/20
SNOWFALL (INCHES)
RECORDS
TOTAL 13.6 2008
SNOW DEPTH 11 10/13/2008
TOTALS 1.0 1.0 0.0 13.6
LIQUID EQUIV 0.10 0.10 0.00 1.36
SINCE 7/1 1.0 1.2 -0.2 13.6
LIQUID 7/1 0.10 0.10 0.00 1.36
SNOWDEPTH AVG. 0 1
DAYS >= TRACE 9 4
DAYS >= 1.0 1 1
GREATEST
SNOW DEPTH 0 11 10/13
24 HR TOTAL 1.0 10/14 TO 10/14
DEGREE_DAYS
HEATING TOTAL 796 609 187 616
SINCE 7/1 940 922 18 878
COOLING TOTAL 0 1 -1 4
SINCE 1/1 461 494 -33 472
.............................................................
WIND (MPH)
AVERAGE WIND SPEED 10.5
RESULTANT WIND SPEED/DIRECTION 2/326
HIGHEST WIND SPEED/DIRECTION 40/310 DATE 10/07
HIGHEST GUST SPEED/DIRECTION 48/320 DATE 10/07
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
NUMBER OF DAYS FAIR 5
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 17
AVERAGE RH (PERCENT) 72
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 2 HAIL 0
HEAVY SNOW 0 SNOW 1
LIGHT SNOW 8 SLEET 1
FOG 12 FOG W/VIS <= 1/4 MILE 1
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLIMATE REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
250 PM MST SUN NOV 1 2009
OCTOBER 2009 WAS MUCH COLDER THAN NORMAL...IN SHARP CONTRAST TO THE
VERY WARM SEPTEMBER OF 2009. THE AVERAGE TEMPERATURE OF 39.0 DEGREES
WAS 6.0 DEGREES BELOW NORMAL AND RANKED AS THE EIGHTH COLDEST OCTOBER
ON RECORD. OCTOBER WAS ALSO 26.3 DEGREES COLDER THAN SEPTEMBER. THE
AVERAGE HIGH TEMPERATURE FOR THE MONTH WAS 47.6 DEGREES AND THE
AVERAGE LOW TEMPERATURE WAS 30.4 DEGREES.
THE FIRST WEEK OF OCTOBER RANGED FROM 5 TO 10 DEGREES BELOW NORMAL
BEFORE A STRONG ARCTIC COLD FRONT MOVED THROUGH DURING THE EVENING
OF THE 8TH. TEMPERATURES PLUMMETED TO SUB-FREEZING VALUES AND DID
NOT RETURN ABOVE FREEZING UNTIL THE 13TH. THE 9TH THROUGH THE 12TH
WAS THE EARLIEST OCCURRENCE OF FOUR CONSECUTIVE DAYS BELOW FREEZING
ON RECORD. DURING THIS TIME PERIOD A NEW RECORD LOW MAXIMUM OF 28
DEGREES WAS SET ON THE 9TH AND A RECORD LOW MAXIMUM OF 31 DEGREES
WAS TIED ON THE 12TH. THE ARCTIC AIRMASS SLOWLY RETREATED AND
TEMPERATURES ROSE ABOVE NORMAL FOR THE FIRST TIME IN OCTOBER ON THE
17TH WHEN THE HIGH TEMPERATURE SOARED TO A MONTHLY MAXIMUM OF 73
DEGREES. TEMPERATURES WERE GENERALLY NEAR NORMAL THEREAFTER...WITH
THE EXCEPTION OF A HIGH TEMPERATURE OF 69 DEGREES ON THE 31ST.
OCTOBER 2009 WAS SLIGHTLY WETTER THAN NORMAL...BUT PRECIPITATION
OCCURRED MUCH MORE FREQUENTLY THAN NORMAL. MEASURABLE PRECIPITATION
WAS RECORDED ON 11 DAYS COMPARED TO THE NORMAL OF 5. THE LIQUID
TOTAL FOR THE MONTH WAS 0.83 INCHES...WHICH WAS 0.12 ABOVE AVERAGE.
MEASURABLE SNOWFALL WAS OBSERVED ON THE 14TH...WITH A TOTAL OF ONE
INCH...WHICH EQUALED THE MONTHLY MEAN FOR OCTOBER.
THE PAST MONTH FEATURED NEAR NORMAL WIND. THE STRONGEST WIND GUST OF
THE DAY WAS 30 MPH OR HIGHER ON 13 DAYS...WHILE 12 DAYS FAILED TO
REACH 20 MPH FOR THE HIGHEST GUST OF THE DAY. THE AVERAGE DAILY
SPEED WAS OVER 10 MPH ON 17 DAYS...AND BELOW 10 MPH ON 14 DAYS. THE
VISIBILITY WAS REDUCED TO A QUARTER MILE OR LESS ON ONE DAY OF THE
MONTH...FREEZING RAIN OCCURRED ON TWO DAYS...AND ICE PELLETS FELL ON
ONE DAY.
SHORT FORMAT STATISTICS FOR OCT 2009:
TEMPERATURE DEP FM NORM
WARMEST 73 ON 17TH
COLDEST 15 ON 9TH
AVG HIGH 47.6 - 9.5
AVG LOW 30.4 - 2.6
AVG TEMP 39.0 - 6.0
DEGREE DAYS
HEATING 796 + 187
SEASON TOTAL 940 + 18
COOLING 0 - 1
SEASON TOTAL 461 - 33
PRECIPITATION
TOTAL 0.83 + 0.12
YEAR TOTAL 9.76 - 0.71
DAYS MEASURABLE 11 + 6
MOST IN 24 HRS 0.32 ON 19TH-20TH
SNOWFALL
TOTAL 1.0 0.0
SEASON TOTAL 1.0 - 0.2
DAYS MEASURABLE 1 0
MOST IN 24 HOURS 1.0 ON 14TH
GREATEST DEPTH 0
WIND IN MPH
STRONGEST GUST NW 48 MPH ON 7TH
AVG SPEED 10.5 MPH - 0.1
WINDIEST DAY 21.7 MPH ON 1ST
CALMEST DAY 3.0 MPH ON 11TH
SIMONSEN/ZIMMERMAN
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