weather.gov     
National Weather Service

Area Forecast Discussion
NWS Homepage
This page is being discontinued on March 12, 2014.
The same data is available at this site. Please update your bookmarks.
Thank you, and we apologize for the inconvenience.
Please send an email to SR-SRH.Webmaster@noaa.gov with any concerns.


Current Version
Previous Version:    01  02  03  04  05  06  07  08  09  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  
   31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  
[Printable]
915
FXUS66 KOTX 220349
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
849 PM PDT TUE OCT 21 2014

.SYNOPSIS...
A cold front exits to east this evening, leaving only some isolated
showers in the Idaho Panhandle. From late Tuesday night through
Wednesday night, the next frontal wave and round of precipitation
comes through. The active pattern continues into early next week,
with the potential for more widespread rain late Friday into
Saturday, then again late Monday into next Tuesday, as moisture
associated with former typhoons makes its way toward the Pacific
Northwest.


&&

.DISCUSSION...
The upper trough axis has moved off to the east and the air mass
has become more stable as warmer air is advected in the mid
levels. The isolated showers that lingered over the Idaho
panhandle have pretty much ended this evening. The main area of
precipitation associated with the next very moist frontal system
is just starting to move ashore. This frontal band will slowly
move east tonight, reaching the Cascade crest in the next couple
of hours. Models are still showing a southwest-northeast gradient
in QPF overnight with the Spokane area right on the edge. Low
level winds have already backed to the south, so it looks like the
basin should escape the rain shadow with this system, but
downsloping off the Camas Prairie and NE Blue Mts should keep much
of the southeast corner dry until late Wednesday. Some minor
adjustments were made for this update but for the most part, the
current forecast package is on track. /Kelch

&&

.AVIATION...
00Z TAFS: Low level flow will back to out of the southeast
overnight as a moist Pacific storm system approaches the region.
Strong warm air advection should clear out the low clouds tonight
with rainfall forming northwest of a line from KMWH to KCQV by
Wednesday morning. KEAT will likely see light rain developing
after 12Z with cigs lowering to MVFR category. Light rain will
spread east to KMWH around 16Z, then to remaining TAF sites after
20Z. Low level wind shear will become a concern as well with
winds increasing significantly off the surface and veering to out
of the southwest, however, low level wind shear is not mentioned
in the TAFs as it does not look to be strong enough. /EK


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        43  59  48  59  43  56 /  10  60  90  50  20  40
Coeur d`Alene  40  57  45  58  41  55 /  10  40  90  70  30  40
Pullman        43  62  47  59  45  58 /   0  20  70  60  30  50
Lewiston       44  66  51  63  48  61 /   0  10  30  60  40  60
Colville       44  54  46  57  41  56 /  20 100 100  60  20  20
Sandpoint      40  55  43  55  38  55 /  10  60  90  70  40  20
Kellogg        38  57  45  54  41  53 /  10  10  80  80  60  40
Moses Lake     49  59  48  64  43  58 /  20  90  90  20  10  50
Wenatchee      48  55  48  61  44  55 /  70 100  80  30  10  60
Omak           46  52  45  59  40  55 /  80 100 100  40  10  20

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.
&&

$$





U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE