Heavy Snow in Washington, November 17 to 19, 2011

Name: Heavy Snow in Washington, November 17 to 19, 2011
Start: 2011-11-17T22:00
End: 2011-11-19T01:00
Location: Washington

November 17 to 19, 2011 · NWS OTX · 2 events in 2 counties and zones

A deep closed low pressure system moved into southwestern Washington. Bands of snow developed along a TROWAL (TROugh of Warm Air ALoft) that extended from northern Idaho into eastern Washington.

Where it happened

Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS OTX wrote it up.

A deep closed low pressure system moved into southwestern Washington. Bands of snow developed along a TROWAL (TROugh of Warm Air ALoft) that extended from northern Idaho into eastern Washington. This feature was nearly stationary overnight on November 17th through November 18th. Snow showers persisted into the early hours of November 19th before this feature weakened and shifted eastward. Heavier snowfall reports ranged from six inches to a foot.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Spokane, WA wrote its last area forecast discussion before the first event at Nov 17, 9:35 PM PST, 25 minutes earlier.

Area forecast discussion, Nov 17, 9:35 PM PST, 25 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
935 PM PST Thu Nov 17 2011

.SYNOPSIS...
Another round of snow is likely on Friday especially over extreme
Eastern Washington and North Idaho. The weekend promises to be colder
than average followed by periodic bouts of mountain snow and
valley rain or snow through the next week.

&&

.DISCUSSION...Updated discussion to send out new aviation forecast
discussion for 06z terminal aviation forecasts, otherwise highlights
and forecast has not been changed. Infrared satellite imagery
continues to show cooling cloud tops and rotation on the north
side of the jet- stream with trajectories toward Eastern
Washington and North Idaho. Mosaic of regional radars is also
picking some of these disturbances up. /Pelatti

&&

.AVIATION...
06Z TAFs...Low pressure system passage and small weather
disturbances associated with it keeps snow and resulting IFR
ceilings and visibilities at times due to snowfall intensity. Rain
may be mixed in for a time near KLWS. Slow entrance of a cold front
from the north will allow for some wind shear as low level
Northeast winds near and behind the front at the surface have
winds change to more from the Northwest aloft.

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        28  32  15  25  11  28 /  70 100  50  20  20  20
Coeur d'Alene  27  32  14  25  14  29 /  80 100  60  20  20  20
Pullman        28  33  18  28  15  31 /  70  90  60  50  30  10
Lewiston       31  40  24  35  23  36 /  50  80  60  50  30  10
Colville       23  32  10  26   8  29 /  80 100  30  10  20  20
Sandpoint      22  31   9  23  11  29 /  80 100  20  10  20  20
Kellogg        28  28  16  22  15  27 /  80 100  60  40  20  20
Moses Lake     23  36  14  30  13  32 /  30  60  30  20  10  10
Wenatchee      26  35  17  30  15  33 /  30  50  30  30  10  10
Omak           20  33   6  29   7  32 /  60  70  30  20  10  10

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Winter Storm Warning until 10 PM PST Friday for Central
     Panhandle Mountains.

     Winter Storm Warning until 4 PM PST Friday for Coeur d'Alene
     Area-Northern Panhandle.

WA...Winter Storm Warning until 4 PM PST Friday for Northeast
     Mountains-Spokane Area.

&&

Hazardous weather outlook, Nov 17, 6:50 PM PST, 3 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
650 PM PST THU NOV 17 2011

IDZ001-002-004-WAZ036-037-190300-
NORTHERN PANHANDLE-COEUR D'ALENE AREA-CENTRAL PANHANDLE MOUNTAINS-
SPOKANE AREA-NORTHEAST MOUNTAINS-
650 PM PST THU NOV 17 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO AND
NORTHEAST WASHINGTON.

.DAY ONE...TONIGHT

SNOW WILL SPREAD FROM WEST TO EAST AND INTENSIFY OVERNIGHT. SOME
MODERATE TO HEAVY SNOW ACCUMULATIONS ARE EXPECTED INTO FRIDAY.
ADDITIONALLY NORTHEAST WIND GUSTS UP TO 25 MPH WILL MAKE FOR
UNPLEASANT COLD CONDITIONS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

MORE HEAVY SNOW ACCUMULATIONS WILL BE POSSIBLE FRIDAY...FOLLOWED
BY SHARPLY COLDER TEMPERATURES FOR THE WEEKEND...FOLLOWED BY
WARMING AND RISING SNOW LEVELS FOR MUCH OF THE NEXT WORKWEEK.

IDZ003-026-027-WAZ031>035-038-041>044-190300-
IDAHO PALOUSE-LEWISTON AREA-LEWIS AND SOUTHERN NEZ PERCE COUNTIES-
NORTHEAST BLUE MOUNTAINS-LOWER GARFIELD AND ASOTIN COUNTIES-
WASHINGTON PALOUSE-MOSES LAKE AREA-UPPER COLUMBIA BASIN-
OKANOGAN HIGHLANDS-WENATCHEE AREA-EAST SLOPES NORTHERN CASCADES-
OKANOGAN VALLEY-WATERVILLE PLATEAU-
650 PM PST THU NOV 17 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO...
NORTH CENTRAL IDAHO...CENTRAL WASHINGTON...EAST CENTRAL
WASHINGTON...NORTH CENTRAL WASHINGTON AND SOUTHEAST WASHINGTON.

.DAY ONE...TONIGHT

SNOW WILL SPREAD FROM WEST TO EAST AND INTENSIFY OVERNIGHT. SOME
LIGHT SNOW ACCUMULATIONS IS EXPECTED INTO FRIDAY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

MORE SNOW FOR FRIDAY...GENERALLY LIGHT IN VALLEYS BUT HEAVY SNOW
ACCUMULATIONS ARE POSSIBLE FOR ALL MOUNTAINS. SHARPLY COLDER
TEMPERATURES ARE EXPECTED THIS WEEKEND....FOLLOWED BY WARMING AND
RISING SNOW LEVELS FOR MUCH OF THE NEXT WORKWEEK.

In the hours before

Local storm report, Nov 17, 4:08 PM PST, 5 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SPOKANE WA
408 PM PST THU NOV 17 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1105 PM     HEAVY SNOW       2 SSW LEAVENWORTH       47.57N 120.68W
11/16/2011  M6.0 INCH        CHELAN             WA   TRAINED SPOTTER

            SPOTTER CHELAN 34, ACCUMULATION SINCE 12PM, STILL SNOWING
            29 DEGREES

0310 AM     HEAVY SNOW       6 WNW DIAMOND LAKE      48.17N 117.31W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

0600 AM           SNOW       6 W NEWPORT             48.18N 117.17W
11/17/2011  M3.9 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-9

0600 AM     HEAVY SNOW       13 NE SANDPOINT         48.38N 116.31W
11/17/2011  M5.2 INCH        BONNER             ID   TRAINED SPOTTER

            COCORAHS ID-BR-8

0600 AM           SNOW       1 SW BREWSTER           48.09N 119.79W
11/17/2011  M3.3 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-1

0600 AM           SNOW       6 NE ELK                48.08N 117.19W
11/17/2011  M1.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-1

0630 AM           SNOW       10 NW KETTLE FALLS      48.72N 118.20W
11/17/2011  M3.0 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-8

0630 AM     HEAVY SNOW       1 NW PLAIN              47.77N 120.66W
11/17/2011  M5.6 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-35

0630 AM           SNOW       3 WNW ALENE             47.71N 116.84W
11/17/2011  M1.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-8

0700 AM     HEAVY SNOW       PORTHILL                48.99N 116.49W
11/17/2011  M5.0 INCH        BOUNDARY           ID   CO-OP OBSERVER

0700 AM     HEAVY SNOW       12 N LEAVENWORTH        47.77N 120.66W
11/17/2011  M6.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-33

0700 AM     HEAVY SNOW       9 W CHELAN              47.83N 120.21W
11/17/2011  M4.9 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-36

0700 AM           SNOW       1 N EAST WENATCHEE      47.44N 120.29W
11/17/2011  M1.8 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-3

0700 AM           SNOW       2 NNE EAST WENATCHEE    47.44N 120.27W
11/17/2011  M3.1 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-16

0700 AM           SNOW       2 E EAST WENATCHEE      47.41N 120.24W
11/17/2011  M1.7 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-18

0700 AM           SNOW       4 N REPUBLIC            48.71N 118.72W
11/17/2011  M2.8 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-1

0700 AM     HEAVY SNOW       4 WNW WINTHROP          48.49N 120.25W
11/17/2011  M6.5 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-11

0700 AM     HEAVY SNOW       10 N METALINE FALLS     49.01N 117.37W
11/17/2011  M4.0 INCH        XXX                XX   CO-OP OBSERVER

            BOUNDARY DAM

0700 AM     SNOW             CONCONULLY              48.56N 119.75W
11/17/2011  M2.6 INCH        OKANOGAN           WA   CO-OP OBSERVER

0700 AM     SNOW             NORTHPORT               48.92N 117.78W
11/17/2011  M2.8 INCH        STEVENS            WA   CO-OP OBSERVER

0700 AM     SNOW             3 NW AIRWAY HEIGHTS     47.68N 117.63W
11/17/2011  M0.2 INCH        SPOKANE            WA   OFFICIAL NWS OBS

            WFO SPOKANE

0700 AM     SNOW             3 ESE AIRWAY HEIGHTS    47.62N 117.53W
11/17/2011  M0.3 INCH        SPOKANE            WA   OFFICIAL NWS OBS

            SPOKANE INTERNATIONAL AIRPORT

0700 AM     SNOW             BRIDGEPORT              48.01N 119.67W
11/17/2011  M2.0 INCH        DOUGLAS            WA   CO-OP OBSERVER

0700 AM     HEAVY SNOW       BONNERS FERRY           48.69N 116.32W
11/17/2011  M6.5 INCH        BOUNDARY           ID   CO-OP OBSERVER

0700 AM     HEAVY SNOW       STEHEKIN                48.31N 120.65W
11/17/2011  M16.0 INCH       CHELAN             WA   CO-OP OBSERVER

0700 AM           SNOW       4 E SPIRIT LAKE         47.96N 116.79W
11/17/2011  M2.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-1

0700 AM     HEAVY SNOW       3 SE WINTHROP           48.43N 120.14W
11/17/2011  M6.3 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-12

0700 AM           SNOW       5 S WENATCHEE           47.36N 120.33W
11/17/2011  M2.7 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-31

0700 AM           SNOW       SSW METALINE FALLS      48.86N 117.37W
11/17/2011  M3.3 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-10

0700 AM     HEAVY SNOW       13 NW ENTIAT            47.80N 120.41W
11/17/2011  M4.2 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-22

0700 AM           SNOW       2 S WENATCHEE           47.40N 120.33W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-19

0700 AM           SNOW       S WENATCHEE             47.42N 120.33W
11/17/2011  M3.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-7

0700 AM           SNOW       7 ENE MOSCOW            46.78N 116.86W
11/17/2011  M1.0 INCH        LATAH              ID   TRAINED SPOTTER

            COCORAHS ID-LT-4

0700 AM           SNOW       2 ENE ATHOL             47.95N 116.68W
11/17/2011  M1.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-3

0700 AM           SNOW       12 SSE PRIEST RIVER     48.03N 116.81W
11/17/2011  M2.8 INCH        BONNER             ID   TRAINED SPOTTER

            COCORAHS ID-BR-15

0715 AM           SNOW       2 WSW MALAGA            47.36N 120.23W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-17

0726 AM     HEAVY SNOW       SANDPOINT               48.28N 116.56W
11/17/2011  M6.0 INCH        BONNER             ID   TRAINED SPOTTER

            6 INCHES OF SNOW OVERNIGHT AT SANDPOINT.

0730 AM           SNOW       1 WSW WENATCHEE         47.42N 120.34W
11/17/2011  M2.1 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-13

0747 AM     HEAVY SNOW       1 NE PESHASTIN          47.57N 120.60W
11/17/2011  M6.4 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-28

0752 AM     HEAVY SNOW       6 NW DIAMOND LAKE       48.17N 117.31W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            SPOTTER PO16. ELEVATION 2318 FEET. SNOW FELL OVERNIGHT.

0800 AM     HEAVY SNOW       3 NW NAPLES             48.60N 116.44W
11/17/2011  M7.0 INCH        BOUNDARY           ID   TRAINED SPOTTER

0800 AM     HEAVY SNOW       2 ENE LEAVENWORTH       47.60N 120.63W
11/17/2011  M6.5 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-27

0800 AM     SNOW             CHELAN                  47.85N 120.03W
11/17/2011  M2.3 INCH        CHELAN             WA   CO-OP OBSERVER

0800 AM     SNOW             WATERVILLE              47.65N 120.07W
11/17/2011  M2.6 INCH        DOUGLAS            WA   CO-OP OBSERVER

0800 AM           SNOW       1 SE COLVILLE           48.54N 117.88W
11/17/2011  M3.5 INCH        STEVENS            WA   TRAINED SPOTTER

            COCORAHS WA-ST-12

0800 AM     HEAVY SNOW       1 NNW LEAVENWORTH       47.60N 120.67W
11/17/2011  M6.4 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-23

0800 AM     HEAVY SNOW       SANDPOINT               48.28N 116.56W
11/17/2011  M4.2 INCH        BONNER             ID   CO-OP OBSERVER

0800 AM           SNOW       7 E TONASKET            48.70N 119.28W
11/17/2011  M1.5 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-2

0800 AM           SNOW       8 NNE REPUBLIC          48.76N 118.66W
11/17/2011  M2.4 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-5

0830 AM           SNOW       WSW MALAGA              47.37N 120.21W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-4

0900 AM     SNOW             CHEWELAH                48.29N 117.73W
11/17/2011  M3.0 INCH        STEVENS            WA   CO-OP OBSERVER

0900 AM     HEAVY SNOW       PLAIN                   47.76N 120.65W
11/17/2011  M5.9 INCH        CHELAN             WA   CO-OP OBSERVER

0900 AM     HEAVY SNOW       MAZAMA                  48.58N 120.39W
11/17/2011  M9.4 INCH        OKANOGAN           WA   CO-OP OBSERVER

0407 PM     HEAVY SNOW       WINTHROP                48.47N 120.18W
11/17/2011  M6.2 INCH        OKANOGAN           WA   CO-OP OBSERVER

&&

MAT

Local storm report, Nov 17, 6:06 PM PST, 3 hours 54 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SPOKANE WA
606 PM PST THU NOV 17 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1105 PM     HEAVY SNOW       2 SSW LEAVENWORTH       47.57N 120.68W
11/16/2011  M6.0 INCH        CHELAN             WA   TRAINED SPOTTER

            SPOTTER CHELAN 34, ACCUMULATION SINCE 12PM, STILL SNOWING
            29 DEGREES

0310 AM     HEAVY SNOW       6 WNW DIAMOND LAKE      48.17N 117.31W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

0600 AM           SNOW       6 W NEWPORT             48.18N 117.17W
11/17/2011  M3.9 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-9

0600 AM     HEAVY SNOW       13 NE SANDPOINT         48.38N 116.31W
11/17/2011  M5.2 INCH        BONNER             ID   TRAINED SPOTTER

            COCORAHS ID-BR-8

0600 AM           SNOW       6 NE ELK                48.08N 117.19W
11/17/2011  M1.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-1

0600 AM           SNOW       1 SW BREWSTER           48.09N 119.79W
11/17/2011  M3.3 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-1

0630 AM           SNOW       10 NW KETTLE FALLS      48.72N 118.20W
11/17/2011  M3.0 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-8

0630 AM           SNOW       3 WNW ALENE             47.71N 116.84W
11/17/2011  M1.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-8

0630 AM     HEAVY SNOW       1 NW PLAIN              47.77N 120.66W
11/17/2011  M5.6 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-35

0700 AM     SNOW             3 NW AIRWAY HEIGHTS     47.68N 117.63W
11/17/2011  M0.2 INCH        SPOKANE            WA   OFFICIAL NWS OBS

            WFO SPOKANE

0700 AM     SNOW             NORTHPORT               48.92N 117.78W
11/17/2011  M2.8 INCH        STEVENS            WA   CO-OP OBSERVER

0700 AM     SNOW             CONCONULLY              48.56N 119.75W
11/17/2011  M2.6 INCH        OKANOGAN           WA   CO-OP OBSERVER

0700 AM     HEAVY SNOW       4 WNW WINTHROP          48.49N 120.25W
11/17/2011  M6.5 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-11

0700 AM           SNOW       4 N REPUBLIC            48.71N 118.72W
11/17/2011  M2.8 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-1

0700 AM           SNOW       2 E EAST WENATCHEE      47.41N 120.24W
11/17/2011  M1.7 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-18

0700 AM           SNOW       2 NNE EAST WENATCHEE    47.44N 120.27W
11/17/2011  M3.1 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-16

0700 AM           SNOW       1 N EAST WENATCHEE      47.44N 120.29W
11/17/2011  M1.8 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-3

0700 AM     HEAVY SNOW       9 W CHELAN              47.83N 120.21W
11/17/2011  M4.9 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-36

0700 AM     SNOW             3 ESE AIRWAY HEIGHTS    47.62N 117.53W
11/17/2011  M0.3 INCH        SPOKANE            WA   OFFICIAL NWS OBS

            SPOKANE INTERNATIONAL AIRPORT

0700 AM     SNOW             BRIDGEPORT              48.01N 119.67W
11/17/2011  M2.0 INCH        DOUGLAS            WA   CO-OP OBSERVER

0700 AM     HEAVY SNOW       BONNERS FERRY           48.69N 116.32W
11/17/2011  M6.5 INCH        BOUNDARY           ID   CO-OP OBSERVER

0700 AM     HEAVY SNOW       STEHEKIN                48.31N 120.65W
11/17/2011  M16.0 INCH       CHELAN             WA   CO-OP OBSERVER

0700 AM           SNOW       4 E SPIRIT LAKE         47.96N 116.79W
11/17/2011  M2.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-1

0700 AM     HEAVY SNOW       3 SE WINTHROP           48.43N 120.14W
11/17/2011  M6.3 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-12

0700 AM           SNOW       5 S WENATCHEE           47.36N 120.33W
11/17/2011  M2.7 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-31

0700 AM     HEAVY SNOW       13 NW ENTIAT            47.80N 120.41W
11/17/2011  M4.2 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-22

0700 AM           SNOW       2 S WENATCHEE           47.40N 120.33W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-19

0700 AM     HEAVY SNOW       9 N METALINE            48.99N 117.35W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   CO-OP OBSERVER

            BOUNDARY DAM

0700 AM     HEAVY SNOW       12 N LEAVENWORTH        47.77N 120.66W
11/17/2011  M6.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-33

0700 AM     HEAVY SNOW       PORTHILL                48.99N 116.49W
11/17/2011  M5.0 INCH        BOUNDARY           ID   CO-OP OBSERVER

0700 AM           SNOW       SSW METALINE FALLS      48.86N 117.37W
11/17/2011  M3.3 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-10

0700 AM           SNOW       12 SSE PRIEST RIVER     48.03N 116.81W
11/17/2011  M2.8 INCH        BONNER             ID   TRAINED SPOTTER

            COCORAHS ID-BR-15

0700 AM           SNOW       2 ENE ATHOL             47.95N 116.68W
11/17/2011  M1.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-3

0700 AM           SNOW       7 ENE MOSCOW            46.78N 116.86W
11/17/2011  M1.0 INCH        LATAH              ID   TRAINED SPOTTER

            COCORAHS ID-LT-4

0700 AM           SNOW       S WENATCHEE             47.42N 120.33W
11/17/2011  M3.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-7

0715 AM           SNOW       2 WSW MALAGA            47.36N 120.23W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-17

0726 AM     HEAVY SNOW       SANDPOINT               48.28N 116.56W
11/17/2011  M6.0 INCH        BONNER             ID   TRAINED SPOTTER

            6 INCHES OF SNOW OVERNIGHT AT SANDPOINT.

0730 AM           SNOW       1 WSW WENATCHEE         47.42N 120.34W
11/17/2011  M2.1 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-13

0747 AM     HEAVY SNOW       1 NE PESHASTIN          47.57N 120.60W
11/17/2011  M6.4 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-28

0752 AM     HEAVY SNOW       6 NW DIAMOND LAKE       48.17N 117.31W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            SPOTTER PO16. ELEVATION 2318 FEET. SNOW FELL OVERNIGHT.

0800 AM     HEAVY SNOW       SANDPOINT               48.28N 116.56W
11/17/2011  M4.2 INCH        BONNER             ID   CO-OP OBSERVER

0800 AM           SNOW       8 NNE REPUBLIC          48.76N 118.66W
11/17/2011  M2.4 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-5

0800 AM           SNOW       7 E TONASKET            48.70N 119.28W
11/17/2011  M1.5 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-2

0800 AM     HEAVY SNOW       3 NW NAPLES             48.60N 116.44W
11/17/2011  M7.0 INCH        BOUNDARY           ID   TRAINED SPOTTER

0800 AM     HEAVY SNOW       2 ENE LEAVENWORTH       47.60N 120.63W
11/17/2011  M6.5 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-27

0800 AM     SNOW             CHELAN                  47.85N 120.03W
11/17/2011  M2.3 INCH        CHELAN             WA   CO-OP OBSERVER

0800 AM     SNOW             WATERVILLE              47.65N 120.07W
11/17/2011  M2.6 INCH        DOUGLAS            WA   CO-OP OBSERVER

0800 AM           SNOW       1 SE COLVILLE           48.54N 117.88W
11/17/2011  M3.5 INCH        STEVENS            WA   TRAINED SPOTTER

            COCORAHS WA-ST-12

0800 AM     HEAVY SNOW       1 NNW LEAVENWORTH       47.60N 120.67W
11/17/2011  M6.4 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-23

0830 AM           SNOW       WSW MALAGA              47.37N 120.21W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-4

0900 AM     HEAVY SNOW       MAZAMA                  48.58N 120.39W
11/17/2011  M9.4 INCH        OKANOGAN           WA   CO-OP OBSERVER

0900 AM     HEAVY SNOW       PLAIN                   47.76N 120.65W
11/17/2011  M5.9 INCH        CHELAN             WA   CO-OP OBSERVER

0900 AM     SNOW             CHEWELAH                48.29N 117.73W
11/17/2011  M3.0 INCH        STEVENS            WA   CO-OP OBSERVER

0400 PM     HEAVY SNOW       NEWPORT                 48.18N 117.05W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   CO-OP OBSERVER

0400 PM     SNOW             REPUBLIC                48.65N 118.73W
11/17/2011  M3.0 INCH        FERRY              WA   CO-OP OBSERVER

0407 PM     HEAVY SNOW       WINTHROP                48.47N 120.18W
11/17/2011  M6.2 INCH        OKANOGAN           WA   CO-OP OBSERVER

&&

MAT

Local storm report, Nov 17, 6:37 PM PST, 3 hours 23 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SPOKANE WA
637 PM PST THU NOV 17 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1105 PM     HEAVY SNOW       2 SSW LEAVENWORTH       47.57N 120.68W
11/16/2011  M6.0 INCH        CHELAN             WA   TRAINED SPOTTER

            SPOTTER CHELAN 34, ACCUMULATION SINCE 12PM, STILL SNOWING
            29 DEGREES

0310 AM     HEAVY SNOW       6 WNW DIAMOND LAKE      48.17N 117.31W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

0600 AM     HEAVY SNOW       13 NE SANDPOINT         48.38N 116.31W
11/17/2011  M5.2 INCH        BONNER             ID   TRAINED SPOTTER

            COCORAHS ID-BR-8

0600 AM           SNOW       6 NE ELK                48.08N 117.19W
11/17/2011  M1.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-1

0600 AM           SNOW       1 SW BREWSTER           48.09N 119.79W
11/17/2011  M3.3 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-1

0600 AM           SNOW       6 W NEWPORT             48.18N 117.17W
11/17/2011  M3.9 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-9

0630 AM           SNOW       3 WNW ALENE             47.71N 116.84W
11/17/2011  M1.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-8

0630 AM     HEAVY SNOW       1 NW PLAIN              47.77N 120.66W
11/17/2011  M5.6 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-35

0630 AM           SNOW       10 NW KETTLE FALLS      48.72N 118.20W
11/17/2011  M3.0 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-8

0700 AM     SNOW             BRIDGEPORT              48.01N 119.67W
11/17/2011  M2.0 INCH        DOUGLAS            WA   CO-OP OBSERVER

0700 AM     SNOW             3 ESE AIRWAY HEIGHTS    47.62N 117.53W
11/17/2011  M0.3 INCH        SPOKANE            WA   OFFICIAL NWS OBS

            SPOKANE INTERNATIONAL AIRPORT

0700 AM     HEAVY SNOW       9 W CHELAN              47.83N 120.21W
11/17/2011  M4.9 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-36

0700 AM           SNOW       1 N EAST WENATCHEE      47.44N 120.29W
11/17/2011  M1.8 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-3

0700 AM           SNOW       2 NNE EAST WENATCHEE    47.44N 120.27W
11/17/2011  M3.1 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-16

0700 AM           SNOW       2 E EAST WENATCHEE      47.41N 120.24W
11/17/2011  M1.7 INCH        DOUGLAS            WA   TRAINED SPOTTER

            COCORAHS WA-DG-18

0700 AM           SNOW       4 N REPUBLIC            48.71N 118.72W
11/17/2011  M2.8 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-1

0700 AM     HEAVY SNOW       4 WNW WINTHROP          48.49N 120.25W
11/17/2011  M6.5 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-11

0700 AM     SNOW             CONCONULLY              48.56N 119.75W
11/17/2011  M2.6 INCH        OKANOGAN           WA   CO-OP OBSERVER

0700 AM     HEAVY SNOW       BONNERS FERRY           48.69N 116.32W
11/17/2011  M6.5 INCH        BOUNDARY           ID   CO-OP OBSERVER

0700 AM     HEAVY SNOW       STEHEKIN                48.31N 120.65W
11/17/2011  M16.0 INCH       CHELAN             WA   CO-OP OBSERVER

0700 AM           SNOW       4 E SPIRIT LAKE         47.96N 116.79W
11/17/2011  M2.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-1

0700 AM     HEAVY SNOW       3 SE WINTHROP           48.43N 120.14W
11/17/2011  M6.3 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-12

0700 AM           SNOW       5 S WENATCHEE           47.36N 120.33W
11/17/2011  M2.7 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-31

0700 AM     HEAVY SNOW       13 NW ENTIAT            47.80N 120.41W
11/17/2011  M4.2 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-22

0700 AM           SNOW       2 S WENATCHEE           47.40N 120.33W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-19

0700 AM     HEAVY SNOW       9 N METALINE            48.99N 117.35W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   CO-OP OBSERVER

            BOUNDARY DAM

0700 AM     HEAVY SNOW       PORTHILL                48.99N 116.49W
11/17/2011  M5.0 INCH        BOUNDARY           ID   CO-OP OBSERVER

0700 AM           SNOW       SSW METALINE FALLS      48.86N 117.37W
11/17/2011  M3.3 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            COCORAHS WA-PO-10

0700 AM     SNOW             NORTHPORT               48.92N 117.78W
11/17/2011  M2.8 INCH        STEVENS            WA   CO-OP OBSERVER

0700 AM     SNOW             3 NW AIRWAY HEIGHTS     47.68N 117.63W
11/17/2011  M0.2 INCH        SPOKANE            WA   OFFICIAL NWS OBS

            WFO SPOKANE

0700 AM     HEAVY SNOW       12 N LEAVENWORTH        47.77N 120.66W
11/17/2011  M6.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-33

0700 AM           SNOW       S WENATCHEE             47.42N 120.33W
11/17/2011  M3.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-7

0700 AM           SNOW       7 ENE MOSCOW            46.78N 116.86W
11/17/2011  M1.0 INCH        LATAH              ID   TRAINED SPOTTER

            COCORAHS ID-LT-4

0700 AM           SNOW       2 ENE ATHOL             47.95N 116.68W
11/17/2011  M1.0 INCH        KOOTENAI           ID   TRAINED SPOTTER

            COCORAHS ID-KT-3

0700 AM           SNOW       12 SSE PRIEST RIVER     48.03N 116.81W
11/17/2011  M2.8 INCH        BONNER             ID   TRAINED SPOTTER

            COCORAHS ID-BR-15

0715 AM           SNOW       2 WSW MALAGA            47.36N 120.23W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-17

0726 AM     HEAVY SNOW       SANDPOINT               48.28N 116.56W
11/17/2011  M6.0 INCH        BONNER             ID   TRAINED SPOTTER

            6 INCHES OF SNOW OVERNIGHT AT SANDPOINT.

0730 AM           SNOW       1 WSW WENATCHEE         47.42N 120.34W
11/17/2011  M2.1 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-13

0747 AM     HEAVY SNOW       1 NE PESHASTIN          47.57N 120.60W
11/17/2011  M6.4 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-28

0752 AM     HEAVY SNOW       6 NW DIAMOND LAKE       48.17N 117.31W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   TRAINED SPOTTER

            SPOTTER PO16. ELEVATION 2318 FEET. SNOW FELL OVERNIGHT.

0800 AM           SNOW       1 SE COLVILLE           48.54N 117.88W
11/17/2011  M3.5 INCH        STEVENS            WA   TRAINED SPOTTER

            COCORAHS WA-ST-12

0800 AM     HEAVY SNOW       1 NNW LEAVENWORTH       47.60N 120.67W
11/17/2011  M6.4 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-23

0800 AM           SNOW       7 E TONASKET            48.70N 119.28W
11/17/2011  M1.5 INCH        OKANOGAN           WA   TRAINED SPOTTER

            COCORAHS WA-OK-2

0800 AM     HEAVY SNOW       3 NW NAPLES             48.60N 116.44W
11/17/2011  M7.0 INCH        BOUNDARY           ID   TRAINED SPOTTER

0800 AM     HEAVY SNOW       2 ENE LEAVENWORTH       47.60N 120.63W
11/17/2011  M6.5 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-27

0800 AM     SNOW             CHELAN                  47.85N 120.03W
11/17/2011  M2.3 INCH        CHELAN             WA   CO-OP OBSERVER

0800 AM     SNOW             WATERVILLE              47.65N 120.07W
11/17/2011  M2.6 INCH        DOUGLAS            WA   CO-OP OBSERVER

0800 AM     HEAVY SNOW       SANDPOINT               48.28N 116.56W
11/17/2011  M4.2 INCH        BONNER             ID   CO-OP OBSERVER

0800 AM           SNOW       8 NNE REPUBLIC          48.76N 118.66W
11/17/2011  M2.4 INCH        FERRY              WA   TRAINED SPOTTER

            COCORAHS WA-FY-5

0830 AM           SNOW       WSW MALAGA              47.37N 120.21W
11/17/2011  M2.0 INCH        CHELAN             WA   TRAINED SPOTTER

            COCORAHS WA-CH-4

0900 AM     HEAVY SNOW       MAZAMA                  48.58N 120.39W
11/17/2011  M9.4 INCH        OKANOGAN           WA   CO-OP OBSERVER

0900 AM     HEAVY SNOW       PLAIN                   47.76N 120.65W
11/17/2011  M5.9 INCH        CHELAN             WA   CO-OP OBSERVER

0900 AM     SNOW             CHEWELAH                48.29N 117.73W
11/17/2011  M3.0 INCH        STEVENS            WA   CO-OP OBSERVER

0400 PM     HEAVY SNOW       NEWPORT                 48.18N 117.05W
11/17/2011  M4.0 INCH        PEND OREILLE       WA   CO-OP OBSERVER

0400 PM     SNOW             REPUBLIC                48.65N 118.73W
11/17/2011  M3.0 INCH        FERRY              WA   CO-OP OBSERVER

0400 PM     HEAVY SNOW       COLVILLE                48.54N 117.89W
11/17/2011  M4.2 INCH        STEVENS            WA   CO-OP OBSERVER

0407 PM     HEAVY SNOW       WINTHROP                48.47N 120.18W
11/17/2011  M6.2 INCH        OKANOGAN           WA   CO-OP OBSERVER

&&

MAT

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 heavy snow. Local standard time, as filed.

Heavy Snow, Northeast Mountains

When: November 17, 10:00 PM PST to November 18, 10:00 PM PST
Where: Northeast Mountains forecast zone
Reported by: Trained Spotter
Coordinates: 48.184, -117.511 (the zone’s center; the record gives no point)

Heavy Snow, Okanogan Highlands

When: November 18, 9:30 AM PST to November 19, 1:00 AM PST
Where: Okanogan Highlands forecast zone
Reported by: Trained Spotter
Coordinates: 48.510, -119.128 (the zone’s center; the record gives no point)

What these are

Heavy Snow: Snowfall reaching the local warning threshold without the other hazards of a winter storm.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Washington in 2011 Every state in 2011 This day in weather history Warnings in Washington, November 2011

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 351143, 351144.