National Weather Service Text Product
AFOS product AFDOTX
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: AFDOTX
Product Timestamp: 2013-06-09 16:40 UTC
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427 FXUS66 KOTX 091640 AFDOTX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SPOKANE WA 940 AM PDT Sun Jun 9 2013 .SYNOPSIS... Warm and dry weather is expected this weekend and into Tuesday. A pattern change will arrive Tuesday night into Wednesday as an upper level trough of low pressure develops over the Pacific Northwest. Temperatures will cool to below average on Wednesday through the end of the work week. There will also be the potential for showers and thunderstorms Wednesday through Friday. The best chances for precipitation will be over the mountainous regions of the Inland Northwest. && .DISCUSSION... Morning update: Forecast update sent to increase winds for this morning and afternoon. The westerly jet stream across southern BC will gradually sag south into extreme northern WA through the day. The strong westerly flow across the northwestern US will continue to produce pressure falls in the lee of the Rockies, focusing over central Montana. Meanwhile, close examination of the KUIL sounding taken from NW WA indicates the marine layer has increased roughly 1000' from yesterday. This will create cross CWA pressure gradients, generally from Portland to Kalispell on the order of 10mb through the day resulting in breezy winds for most locations from the Wenatchee Valley...Columbia Basin...West Plains...Palouse...and exposed ridgetops. Bufkit data does not show very strong winds within the mixed layer so most gusts will be on the order of 25 mph or less but sustained winds of 10 to 20 mph are expected. The exception is along the Waterville Plateau and Wenatchee River Valley which will experience gusts closer to 30-35 mph...largely in the evening time-frame. As for temperatures...most locations across Idaho and far eastern reaches of WA should warm similar to Saturday...but further west...the air mass will cool 1-2C equating to 2-4 degrees Fahrenheit of cooling for afternoon highs. /sb && .AVIATION... 18Z TAFS: Flat high pressure aloft will continue to support mostly sunny skies and dry conditions. Main aviation concern will be breezy to locally gusty winds across most sites. Most locations will experience gusts to 25 mph btwn 18-03z. This gusts will increase near 30-35 mph vcnty of KEAT, especially between 23-04z. The pattern is also conducive to midlevel turbulent flow in the lee of the Cascades but given the lack of moisture...wave clouds may not be present. /sb && .PRELIMINARY POINT TEMPS/POPS... Spokane 77 50 76 49 73 45 / 0 0 0 0 0 10 Coeur d'Alene 75 47 76 46 72 43 / 0 0 0 0 0 10 Pullman 76 45 75 44 72 41 / 0 0 0 0 0 10 Lewiston 86 54 83 52 81 48 / 0 0 0 0 10 20 Colville 79 46 81 47 78 44 / 0 0 0 0 0 10 Sandpoint 75 43 75 43 72 42 / 0 0 0 0 10 10 Kellogg 73 50 74 49 71 43 / 0 0 0 0 10 20 Moses Lake 84 49 81 49 78 45 / 0 0 0 0 10 10 Wenatchee 81 54 79 53 75 50 / 0 0 0 0 10 10 Omak 80 48 79 49 77 46 / 0 0 0 0 10 20 && .OTX WATCHES/WARNINGS/ADVISORIES... ID...None. WA...None. && $$