Climatological Report (Monthly)
Issued by NWS Spokane, WA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
000
CXUS46 KOTX 061923 CCA
CLMLWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE, WA
753 AM PST FRI MAR 3 2017

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF
FEBRUARY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              72   02/24/1986
 LOW              -18   02/12/1884
HIGHEST            57   02/20        MM      MM       64  02/26
LOWEST             13   02/02        MM      MM       26  02/03
                        02/01
AVG. MAXIMUM     44.3              46.5    -2.2     53.0
AVG. MINIMUM     29.9              30.9    -1.0     35.7
MEAN             37.1              38.7    -1.6     44.4
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      2               1.6     0.4        0
DAYS MIN <= 32     17              14.5     2.5        8
DAYS MIN <= 0       0               0.3    -0.3        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.10   1884
 MINIMUM         0.09   1935
TOTALS           1.97              0.78    1.19     0.65
DAILY AVG.       0.07              0.03    0.04     0.02
DAYS >= .01        15               8.5     6.5       10
DAYS >= .10         8               2.7     5.3        3
DAYS >= .50         0               0.1    -0.1        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.36   02/21 TO 02/21           02/26 TO 02/27

SNOWFALL (INCHES)
RECORDS
 TOTAL           27.2   1916
TOTALS            8.0               2.1     5.9      0.2
SINCE 7/1        34.4               9.8    24.6      6.4
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         4               0.6     3.4        0
GREATEST
 SNOW DEPTH         4   02/27                          0  MM
 24 HR TOTAL      2.7   MM                       02/27 TO 02/27

DEGREE_DAYS
HEATING TOTAL     773               736      37      588
 SINCE 7/1       4036              3855     181     3264
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
........................................................

WIND (MPH)
AVERAGE WIND SPEED              5.1
HIGHEST WIND SPEED/DIRECTION    28/310    DATE  02/06
HIGHEST GUST SPEED/DIRECTION    38/310    DATE  02/06

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               15     FREEZING RAIN              1
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       4
LIGHT SNOW                7     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE      9
HAZE                      5

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

$$

FEBRUARY 2017 WAS AN ACTIVE MONTH ACROSS SOUTHEAST WASHINGTON AND
SOUTH IDAHO PANHANDLE WITH MUCH WETTER THAN NORMAL CONDITIONS WITH
PERIODS OF SNOW...RAIN...AND EVEN FREEZING RAIN.

COLD AND DRY CONDITIONS OCCURRED ON THE 1ST AND 2ND WITH PULLMAN
DROPPING TO -3 DEGREES. THE FIRST PERIOD OF ACTIVE WEATHER OCCURRED
FROM THE 3RD THROUGH THE 6TH AS COLD AIR FROM CANADA COLLIDED WITH
MOIST AIR FROM THE PACIFIC. THE FOCUS OF THIS BOUNDARY WAS NORTH OF
THE AREA ACROSS NORTHEAST WASHINGTON AND NORTH IDAHO.  STILL SEVERAL
ROUNDS OF LIGHT RAIN...FREEZING RAIN...AND SNOW OCCURRED OVER THE
LEWISTON AND PALOUSE AREAS. WARMER WEATHER ON THE 9TH BROUGHT RAIN.
HOWEVER THE PROLONGED COLD WINTER AND FROZEN RIVERS RESULTED IN ICE
JAMS ON THE ST. JOE RIVER WITH WATER OVER ROADS IN CALDER.

A MUCH NEEDED BREAK OCCURRED FROM THE 11TH THROUGH THE 14TH AS
STRONG  HIGH PRESSURE MOVED IN. THIS WAS SHORT LIVED AS MILD AND WET
CONDITIONS OCCURRED FROM THE 15TH THROUGH THE 21ST WITH PERIODS OF
RAIN. A COMBINATION OF RAIN AND SNOW MELT LED TO MINOR FLOODING ON
PARADISE CREEK IN MOSCOW ON THE 16TH AND PALOUSE RIVER AT POTLATCH
ON THE 17TH. THE PATTERN TURNED COLDER YET AGAIN TO FINISH OUT THE
MONTH.  A COLD UNSTABLE LOW PRESSURE SYSTEM ENTERED THE REGION ON
THE 26TH AND 27TH PRODUCING BANDS OF HEAVY SNOW SHOWERS.  ONE
CLUSTER OF HEAVY SNOW HIT LEWISTON WITH 4 INCHES BY THE EARLY
MORNING HOURS OF THE 27TH.  ANOTHER BAND OF HEAVY SNOW HIT SAINT
MARIES LATE ON THE 27TH AND EARLY ON THE 28TH WITH 12-15 INCHES.

A COUPLE RECORDS WERE SET DURING THE MONTH AT THE LEWISTON AIRPORT.
THIS INCLUDES DAILY SNOWFALL RECORDS OF 1.4 INCHES AND 2.7 INCHES
SET ON THE 26TH AND 27TH RESPECTIVELY.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.