Climatological Report (Monthly)
Issued by NWS Spokane, WA

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 25 26 27 28
000
CXUS46 KOTX 021713 CCA
CLMLWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE, WA
351 AM PDT FRI SEP 1 2017

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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             115   08/04/1961
 LOW               41   08/20/1945
                        08/24/1992
HIGHEST           105   08/29        MM      MM       99  08/21
                                                          08/18
                                                          08/16
LOWEST             53   08/26        MM      MM       50  08/23
                        08/25
AVG. MAXIMUM     93.2              88.8     4.4     90.8
AVG. MINIMUM     61.4              59.2     2.2     59.5
MEAN             77.3              74.0     3.3     75.2
DAYS MAX >= 90     21              15.0     6.0       21
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.96   1989
 MINIMUM         0.00   2001
TOTALS           0.02              0.69   -0.67     0.24
DAILY AVG.       0.00              0.02   -0.02     0.01
DAYS >= .01         1               4.1    -3.1        3
DAYS >= .10         0               1.7    -1.7        1
DAYS >= .50         0               0.3    -0.3        0
DAYS >= 1.00        0               0.1    -0.1        0
GREATEST
 24 HR. TOTAL    0.02   08/13 TO 08/13           08/08 TO 08/09

DEGREE_DAYS
HEATING TOTAL       0                 8      -8        2
 SINCE 7/1          0                15     -15       11
COOLING TOTAL     391               287     104      326
 SINCE 1/1       1019               717     302      816
..................................................

WIND (MPH)
AVERAGE WIND SPEED              4.2
HIGHEST WIND SPEED/DIRECTION    23/290    DATE  08/04
HIGHEST GUST SPEED/DIRECTION    30/300    DATE  08/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.10
NUMBER OF DAYS FAIR           29
NUMBER OF DAYS PC              2
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     34

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       0     FOG W/VIS <= 1/4 MILE      0
HAZE                     12

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

$$

AUGUST 2017 WAS ONCE AGAIN WARMER AND DRIER THAN NORMAL ACROSS
SOUTHEAST WASHINGTON AND THE SOUTH IDAHO PANHANDLE. THE
FIRST 12 DAYS BROUGHT WARM AND SMOKY CONDITIONS AS AN UPPER RIDGE
SET UP OFF THE COAST RESULTING IN NORTHWEST FLOW WHICH BROUGHT SMOKE
FROM BRITISH COLUMBIA INTO THE REGION.  THE 4TH WAS ESPECIALLY SMOKY
WITH VISIBILITY DOWN TO 1 TO 3 MILES AT PULLMAN AND LEWISTON.  THE
LEWISTON AIRPORT REACHED BETWEEN 96 AND 102 EACH DAY FROM THE 1ST
THROUGH THE 11TH.  A SIGNIFICANT COOL DOWN ON THE 13TH BROUGHT
LIGHT SHOWERS...WITH HIGHS ONLY IN THE UPPER 70S. DURING THIS
TRANSITION OF AIR MASS ISOLATED THUNDERSTORMS RESULTED ON THE 12TH.
BREEZY CONDITIONS ALSO HELPED CLEAR THE SMOKE OUT OF THE
REGION.  THE WEATHER BECAME SEASONAL FROM THE 15TH THROUGH THE 26TH
WITH GENERALLY DRY CONDITIONS AND NORMAL TEMPERATURES. AN UPPER `
RIDGE BUILT IN AT THE END OF THE MONTH WITH WITH LEWISTON REACHING
105 ON THE 29TH...THIS ALLOWED REGIONAL FIRES TO BECOME MORE ACTIVE
WITH A RETURN OF SMOKY AND HAZY SKIES.  ALSO ON THE 29TH A
THUNDERSTORM DEVELOPED SOUTH OF CRAIGMONT AND SENT OUT STRONG
OUTFLOW WINDS INTO KAMIAH KNOCKING DOWN SEVERAL TREES AND CAUSING
POWER OUTAGES.  ADDITIONAL THUNDERSTORMS TRACKED THROUGH THE BLUE
MOUNTAINS AND CAMAS PRAIRIE ON THE 30TH.

THE LEWISTON AIRPORT BROKE A RECORD HIGH TEMPERATURE ON THE 29TH WITH
105 DEGREES.



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