Area Forecast Discussion National Weather Service Pendleton or 9:04 AM PDT Wednesday Jul 13 2016
Short-term: — today through Thursday morning — water vapor satellite imagery shows a broad Westerly flow aloft across the offshore waters of the Northeast Pacific extending inland over the Pacific Northwest with a mid/upper level low in the Gulf of Alaska West of Queen Charlotte island. The Westerly flow will continue across the interior Northwest through tonight onto Thursday morning for dry conditions while the aforementioned low heads Southeast and reaches Vancouver Island Thursday morning.
I decreased today's maximum temperatures in Central Oregon, the dalles and goldendale by a few degrees and increased cloud cover to partly cloudy in the lower Columbia basin. Decreasing clouds are in store for South Central and Southeast Washington this afternoon. High temperatures today will be in the upper 70s to middle 80s, except in the lower 60s to middle 70s in the mountains with Highs in the Wallowa mountains on;y in the middle 50s to middle 60s. Polan
Aviation: — 11 AM PDT tafs — Visual Flight Rules conditions will prevail for the next 24 hours. Winds will remain less than 12 kt.
Previous discussion — /issued 1:11 AM PDT Wednesday Jul 13 2016/
Short-term: — today through Friday — general overview — very warm and dry for the next few days. Skies will be mostly clear and high temperatures will be in the middle 80s to lower 90s, with 70s to lower 80s mountains. Lows will be in the 50s with 40s mountains. Winds will generally be 5 to 10 mph. The Kittitas valley and the Columbia river gorge may see winds 10 to 15 miles per hour Thursday night into Friday morning.
Technical
Synopsis: — high pressure to the South and a low pressure system to the Northwest will keep the area in a split flow for the rest of the week. Dry air will be accompanied by this Westerly flow. Temperatures will continue to warm through Thursday, with Friday coming in a few degrees cooler. This is due to the low pressure system to the Northwest returning and moving across the Washington /Canada border. As a result pressure gradients along the Kittitas valley and Columbia river gorge will tighten up, providing breezy conditions overnight Thursday night. Weber
Long-term: — Friday night through Wednesday — a dry and stable Northwest flow will prevail over the County warning area Friday night and Saturday morning. An upper low pressure system will move well to the North of the County warning area Friday night and Saturday but the only effect on the County warning area will be some clouds and perhaps some light sprinkles over the Washington Cascades. The upper low will retrograde Westward and then it will move Southeast into the region and County warning area on Sunday. The flow will be Southerly and there will be plenty of low to middle level moisture. This will result in showers and afternoon thunderstorms over the Washington Cascades and from Central Oregon Northeast over the blue mountains Southward. The unstable pattern will persist into Monday with another chance of showers and afternoon thunderstorms over the Washington Cascades and from the blue mountains and Central Oregon Southward. The flow will then become more Westerly and will be drier for Tuesday and Wednesday. Temperatures will be near normal through the period. It will become breezy to windy on Monday afternoon and evening and then winds will become light again. 88
The Area Forecast Discussion is issued four times daily around 3AM, 9AM, 3PM, and 9PM.
A complete list of airport weather stations used for the METAR reporting system is at: http://adds.aviationweather.gov/metars/stations.txt . Regional airports weather station designations are at the bottom of this page.
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Acronyms
ACARS Aeronautical Radio Communications Addressing Reporting System
VFR Visual Flight Rules
Numerical Forecast Models Abbreviations
CMC Canadian Meteorological Centre
ECMWF European Centre for Medium-Range Weather Forecasts
GEM Global Environment Multiscale (CMC's short-range model)
GFDL Geophysical Fluid Dynamics Laboratory's Hurricane Model
GFS Global Forecast System (formerly known as the AVN and MRF)
MM5 Penn State University/National Center for Atmospheric Research's Mesoscale Model
NAM North American Mesoscale (formerly known as the Eta)
NGM Nested Grid Model
NOGAPS Navy Operational Global Atmospheric Prediction System
RUC Rapid Update Cycle Forecast Model
SREF Short Range Ensemble Forecasts
UKMET United Kingdom Meteorological Office
Washington Airports and other NWS stations
elevations in meters
N W elev
WA ARLINGTON MUNI KAWO 48 10N 122 10W 42
WA BELLINGHAM KBLI 48 48N 122 32W 50
WA WHATCOM (BLI) KHUH 48 57N 122 35W 26
WA BREMERTON NTNL KPWT 47 30N 122 45W 147
WA BURLINGTON/MT V KBVS 48 28N 122 25W 43
WA CHEHALIS CENTRAL KCLS 46 41N 122 59W 54
WA COLVILLE MUNICIP KCQV 48 32N 117 52W 572
WA DEER PARK KDEW 47 58N 117 26W 668
WA EASTSOUND/ORCAS KORS 48 42N 122 54W 8
WA ELLENSBURG KELN 47 02N 120 32W 519
WA EPHRATA KEPH 47 18N 119 31W 383
WA EVERETT KPAE 47 55N 122 17W 180
WA FAIRCHILD AFB KSKA 47 37N 117 39W 750
WA FORT LEWIS/GRAY KGRF 47 04N 122 34W 92
WA FRIDAY HARBOR KFHR 48 31N 123 02W 32
WA HANFORD KHMS 46 34N 119 35W 223
WA HOQUIAM KHQM 46 58N 123 56W 7
WA KELSO LONGVEIW KKLS 46 07N 122 54W 5
WA MOSES LAKE KMWH 47 12N 119 19W 362
WA OAK HARBOR AIRPA K76S 48 15N 122 40W 58
WA OLYMPIA KOLM 46 58N 122 54W 58
WA OMAK KOMK 48 28N 119 31W 395
WA PASCO KPSC 46 16N 119 07W 121
WA PORT ANGELES KCLM 48 07N 123 30W 85
WA PULLMAN/MOSCOW KPUW 46 45N 117 07W 773
WA PUYALLOP/THUN KPLU 47 06N 122 17W 164
WA QUILLAYUTE KUIL 47 56N 124 33W 54
WA RENTON KRNT 47 30N 122 13W 21
WA SEATTLE/BOEING KBFI 47 33N 122 19W 4
WA SEATTLE/METRO KSEA 47 27N 122 19W 136
WA SEATTLE/WFO KSEW 47 27N 122 18W 130
WA SEATTLE/ARTCC KZSE 47 17N 122 11W 99
WA SEATTLE/CAMANO I KATX 48 12N 122 30W 151
WA SHELTON KSHN 47 14N 123 08W 82
WA SPOKANE KOTX 47 41N 117 38W 727
WA SPOKANE/FELTS KSFF 47 41N 117 19W 609
WA SPOKANE/METRO KGEG 47 37N 117 32W 735
WA STAMPEDE PASS KSMP 47 17N 121 20W 1208
WA TACOMA KTIW 47 16N 122 35W 89
WA TACOMA/MC CHORD KTCM 47 07N 122 28W 98
WA TATOOSH/VOR KTOU 48 18N 124 38W 520
WA TOLEDO WINLOCK M KTDO 46 28N 122 47W 113
WA VANCOUVER KVUO 45 37N 122 39W 8
WA WALLA WALLA KALW 46 06N 118 17W 363
WA WENATCHEE KEAT 47 24N 120 12W 377
WA WHIDBEY IS. NAS KNUW 48 21N 122 39W 14
WA YAKIMA KYKM 46 34N 120 32W 324
WA BURLINGTON/MT V K75S 48 28N 122 25W 43
WA COLVILLE K63S 48 32N 117 52W 571
WA DEER PARK K07S 47 58N 117 26W 668
WA DESTRUCTION ISL 47 40N 124 31W 21
WA PORT ANGELES CG KNOW 48 08N 123 25W 4
WA SMITH ISLAND 48 19N 122 10W 15
WA PEARSON/VANCOUVR K60S 45 37N 122 39W 8
WA WEST POINT (LS) 47 40N 122 34W 3
BC ABBOTSFORD AIRPO CYXX 49 01N 122 22W 58
BC AGASSIZ (AUTO) CWZA 49 15N 121 46W 15
BC ENTRANCE IL AUTO CWEL 49 13N 123 47W 5
BC ESQUIMALT METOC CWPF 48 25N 123 25W 12
BC HOPE AIRPORT (MA CYHE 49 22N 121 28W 39
BC HOPE SLIDE CWKV 49 16N 121 13W 674
BC KELP REEFS CWZO 48 33N 123 14W 1
BC MALAHAT (AUTOB) CWKH 48 34N 123 34W 366
BC MERRY ISLAND CWMR 49 28N 123 55W 8
BC MT SICKER RADAR CXSI 48 51N 123 45W 1
BC NANAIMO AIRPORT CYCD 49 02N 123 52W 28
BC P. MEADOWS CS AU CWMM 49 12N 122 40W 5
BC RACE ROCKS AUTOB CWQK 48 17N 123 31W 5
BC SAND headS (LS) CWVF 49 06N 123 18W 1
BC SATURNA ISL (MAP CWEZ 48 46N 123 02W 7
BC SHERINGHAM AUTOB CWSP 48 22N 123 55W 21
BC SQUAMISH (AUTOB) CWSK 49 46N 123 10W 60
BC VANCOUVER (AUTOB CWHC 49 17N 123 07W 2
BC VANCOUVER INTL A CYVR 49 10N 123 10W 2
BC VIC. HARTLAND AU CWVV 48 31N 123 28W 49
BC VICTORIA (AUTOB) CWLM 48 25N 123 19W 70
BC VICTORIA HARBOUR CYWH 48 25N 123 23W 10
BC VICTORIA INTL AR CYYJ 48 38N 123 25W 19
BC VICTORIA UNIV CWYJ 48 28N 123 18W 39
BC W VANCOUVER AUTO CWWA 49 21N 123 10W 178
BC WHITE ROCK AUTOB CWWK 49 01N 122 46W 15