Grand Coulee, Washington

450 PM PST Mon Dec 21th 2009


... A large low pressure system moved northeastward just off the
Pacific northwest coast over the course of a several day period.
This resulted in an extended period of a warm and moist overrunning
scenario. Several embedded troughs ejecting out of the parent trough
enhanced showers including one trough on Monday morning that brought
widespread rainfall to the region... and produced nuisance ponding in
fields and yards across northeastern Washington and northern Idaho.
Freezing levels were unseasonably high throughout this event... with
the kotx sounding consistently measuring freezing levels between
6000-7800 ft asl. Snow levels topped out between 5000-6000 ft across
far northern Washington and Idaho though. Due to the weak flow near
the surface for much of this event... dense fog was fairly widespread
as several airports including kgeg... kmwh... and keat experienced
visibilities of a half mile or less during the majority of a 24-48
hour period on Saturday through Monday. Because the cocorahs
observations were from this morning... expect these totals to be
substantially higher when we receive their observations Tuesday
morning. Below are 48 hr and/or storm total precipitation amounts
received through the time of observation (ob)...


Location and elevation St type time & day of ob precip

------------------------------------------------------------------

... Idz001 - northern Idaho Panhandle...

Hidden Lake - 5040 ft sn 100pm Monday 2.00
Bear Mountain - 5400 ft sn 100pm Monday 1.90
Sandpoint 6.9 NNE - 2188 ft CR 700am Monday 1.70
Schweitzer Basin - 6090 ft sn 100pm Monday 1.60
Priest Lake - 2600 ft ra 100pm Monday 1.28
Rathdrum hr 800am Monday 1.22
Hoodoo - 2270 ft ra 100pm Monday 1.01
Clark Fork 3.5 se - 2200 ft CR 700am Monday 0.92
Sandpoint 13.3 NE - 2700 ft CR 700am Monday 0.90
Bayview - 2075 ft co 1000am Monday 0.84
Myrtle Creek - 3520 ft sn 100pm Monday 0.80
Bonners Ferry 1 se WA 700pm Sunday 0.80
Priest River 11.6 SSE CR 700am Monday 0.73
Bonners Ferry - 2310 ft ra 100pm Monday 0.73
Bonners Ferry 5 NW WA 700pm Sunday 0.55
Moyie Springs 3 se WA 700pm Sunday 0.37
Moyie Springs 4 ESE WA 700pm Sunday 0.18


... Idz002 - Coeur D'Alene area...

Coeur D'Alene ap - 2320 ft NW 400pm Monday 1.13
Coeur D'Alene 3.6 NW - 2287 ft CR 700am Monday 0.92
Coeur D'Alene 2.5 WNW CR 700am Monday 0.69


... Idz003 - Idaho Palouse... .

*moscow mountain - 4700 ft sn 900am Monday 0.50
Moscow 1.1 E CR 700am Monday 0.49
Moscow 1.3 SW - 2635 ft CR 700am Monday 0.40


... Idz004 - central Panhandle mountains...

Fourth of July Canyon - 3301 ft ID 320pm Monday 1.61
Harvard - 3620 ft ID 315pm Monday 1.42
Fish Hook - 4700 ft ra 100pm Monday 1.07
lookout - 5140 ft sn 1200pm Monday 0.60
sunset - 5540 ft sn 1200pm Monday 0.60
Mica creek - 4750 ft sn 1200pm Monday 0.50
Nuckols - 4000 ft ra 100pm Monday 0.40
Mullan Pass - 6001 ft NW 400pm Monday 0.31
Humboldt Gulch - 4250 ft sn 1200pm Monday 0.20


... Idz026 - Lewiston area...

Lewiston Airport - 1437 ft NW 400pm Monday 0.31


... Idz027 - Lewis & southern Nez Perce counties...

Mission Creek - 3400 ft ra 300pm Monday 0.31
Corral Creek - 2690 ft ra 300pm Monday 0.09


... Waz031 - Blue Mountains...

Spruce Springs - 5700 ft sn 200pm Monday 0.60
Alder Ridge - 4500 ft ra 200pm Monday 0.15


... Waz032 - lower Garfield County...

Pomeroy - 2920 ft co 1000am Monday 0.14


... Waz033 - Washington Palouse...

Escure - 1653 ft ra 200pm Monday 0.46
Pullman 0.9 WSW - 2418 ft CR 700am Monday 0.23
Endicott 6.4 se CR 700am Monday 0.15
Pullman Airport NW 400pm Monday 0.09


... Waz034 - Moses Lake area...

Lind - 1476 ft ag 200pm Monday 0.69
Moses Lake - 1181 ft NW 400pm Monday 0.15
Ephrata 1.7 NW - 1401 ft CR 700am Monday 0.13
Othello - 855 ft ra 300pm Monday 0.12
Ephrata ap - 1276 ft NW 400pm Monday 0.01


... Waz035 - upper Columbia Basin...

Ritzville - 1830 ft co 1000am Monday 0.25
Grand Coulee 3.2 ESE - 1541 ft CR 700am Monday 0.15
Spring Canyon - 1340 ft ra 330pm Monday 0.15


... Waz036 - Spokane area...

Spokane 5.7 SSE - 2392 ft CR 700am Monday 0.98
Spokane NWS - 2387 ft NW 400pm Monday 0.78
Spokane Intl - 2356 ft NW 400pm Monday 0.77
Cheney - 2230 ft ra 330pm Monday 0.77
Spokane Felts Field ap - 1952 ft NW 400pm Monday 0.73
Spokane 5.5 S - 2172 ft CR 700am Monday 0.64
Spokane 1.3 SSW - 1896 ft CR 700am Monday 0.60
Fairchild AFB NW 400pm Monday 0.58
Spokane 8.9 E - 2068 ft CR 700am Monday 0.56
Spokane 5.8 SSE - 2426 ft CR 700am Monday 0.49
Davenport 14.8 N CR 700am Monday 0.36
Davenport 11.1 N - 1686 ft CR 700am Monday 0.35


... Waz037 - northeast mountains...

Bunchgrass Meadows - 5000 ft sn 900am Monday 2.40
Tacoma creek - 3240 ft ra 200pm Monday 1.87
flowery trail - 2680 ft ra 200pm Monday 1.71
teepee seed Orchard - 3280 ft ra 230pm Monday 1.58
pal Moore Orchard - 3120 ft ra 230pm Monday 1.31
Newport 5.5 W CR 700am Monday 0.95
Deer Park ap - 2205 ft NW 400pm Monday 0.90
Quartz Peak - 4700 ft sn 100pm Monday 0.90
Newport 0.4 W - 2182 ft CR 700am Monday 0.87
Ione 5.2 SSE CR 700am Monday 0.87
Bodie mtn - 3600 ft hr 800am Monday 0.75
Ione east - 2102 ft hr 800am Monday 0.75
chamokane - 1950 ft CW 100pm Monday 0.74
boundary dam - 1800 ft co 1000am Monday 0.74
Elk 5.6 NE - 2594 ft CR 700am Monday 0.73
Chewelah - 3000 ft hr 800am Monday 0.60
little Pend Oreille - 2015 ft ra 230pm Monday 0.60
Deer Park 5.1 NNE - 2037 ft CR 700am Monday 0.59
Northport - 1350 ft co 1100am Monday 0.53
Springdale west - 2300 ft hr 800am Monday 0.55
hunters 0.7 ENE CR 700am Monday 0.52
midnight mine - 2693 ft ra 230pm Monday 0.52
Metaline Falls 0.4 SSW CR 700am Monday 0.48
Ford 2.4 SW - 1600 ft CR 700am Monday 0.47
Nine Mile Falls 8.7 NW CR 700am Monday 0.46
Wellpinit - 2240 ft ra 300pm Monday 0.39


... Waz038 - Okanogan Highlands...

Brown Mountain Orchard - 3150 ft ra 200pm Monday 0.54
peony - 3804 ft ra 200pm Monday 0.49
Sentinel Butte - 4920 ft sn 200pm Monday
0.30


... Waz041 - Wenatchee area...

Entiat 12.7 NW - 1564 ft CR 700am Monday 0.20
Entiat - 796 ft ra 300pm Monday 0.09
East Wenatchee 1.3 N - 807 ft CR 700am Monday 0.06
Wenatchee 0.4 S - 796 ft CR 700am Monday 0.06
East Wenatchee 0.5 N - 825 ft CR 700am Monday 0.05
Wenatchee 1.5 S - 906 ft CR 700am Monday 0.05
Wenatchee 4.5 S - 1417 ft CR 700am Monday 0.05
Wenatchee - 640 ft co 100pm Monday 0.03
Malaga 1.5 WSW - 886 ft CR 700am Monday 0.03


... Waz042 - east slopes of northern Cascades...

Lyman Lake - 5900 ft sn 300pm Monday 1.10
Stevens Pass - 4070 ft sn 100pm Monday 0.60
Pope Ridge - 3540 ft sn 100pm Monday 0.40
Holden Village - 3220 ft co 700am Monday 0.38
Leavenworth 1.9 ENE - 1308 ft CR 700am Monday 0.29
Leavenworth 1.0 NNW - 1273 ft CR 700am Monday 0.28
plain 0.8 NW CR 700am Monday 0.27
Leavenworth 12.4 N CR 700am Monday 0.25
Salmon Meadows - 4500 ft sn 100pm Monday 0.20
upper Wheeler - 4400 ft sn 100pm Monday 0.20
Peshastin 5.3 SSW - 1566 ft CR 700am Monday 0.18
Camp 4 - 3156 ft ra 100pm Monday 0.18


... Waz043 - Okanogan Valley...

Kramer - 2720 ft ra 200pm Monday 0.37
Moses mtn - 5300 ft sn 100pm Monday 0.30
Omak Airport - 1301 ft NW 400pm Monday 0.29
Nespelem - 1900 ft ra 200pm Monday 0.26
Tonasket 7.0 E - 3067 ft CR 700am Monday 0.23
Oroville 1.2 NNW - 977 ft CR 700am Monday 0.18
Brewster 0.7 SW - 807 ft CR 700am Monday 0.16
Oroville - 1360 ft ra 100pm Monday 0.14


... Waz044 - Waterville Plateau...

Douglas - 2530 ft ra 100pm Monday 0.20




NW - NWS/FAA
CR - cocorahs
co - coop
hr - ham radio
ID - Idaho dot
ra - RAWS
sn - snotel
sp - spotter
WA - warnetwork