Alert archive / Washington / Flood Watches in 2014

Flood Watch 4, NWS Spokane, WA

December 10, 2014Chelan County, Douglas County, Okanogan County, Washington

NWS Spokane, WA issued this flood watch at Dec 10, 2014, 12:28 PM PST for Chelan County, Douglas County, Okanogan County, Washington. It was in force for 39 hr.

The area

The counties it named.

The facts

Issued
Dec 10, 2014, 12:28 PM PST (20:28 UTC)
Expired
Dec 12, 2014, 3:49 AM PST
In force
39 hr
Issued by
NWS Spokane, WA
Flood severity
None

Counties Chelan County, WA, Douglas County, WA, Okanogan County, WA

The radar

The Spokane radar (KOTX), 183 km from the middle of the area, began a volume at 20:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 8.5 hours before the alert went out and 273 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Spokane, WA at 12:00Z on 2014-12-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 2014-12-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 199 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1052 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
199 m²/s²
0-3 km storm-relative helicity
389 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch went out, 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 this flood watch went out at Dec 10, 10:21 AM PST, 2 hours 7 minutes earlier.

Area forecast discussion, Dec 10, 10:21 AM PST, 2 hours 7 minutes before
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Hazardous weather outlook, Dec 10, 6:04 AM PST, 6 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
604 AM PST WED DEC 10 2014

WAZ042-111415-
EAST SLOPES NORTHERN CASCADES-
604 AM PST WED DEC 10 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

VERY WET WEATHER IS EXPECTED TO IMPACT THE AREA THIS WEEK. PERIODS
OF RAIN AND MOUNTAIN SNOW WILL LIKELY CONTINUE THROUGH THURSDAY.
HEAVY SNOW AMOUNTS ARE LIKELY NEAR THE CREST...HOWEVER MOST OF
THIS SHOULD FALL ABOVE PASS LEVELS. BETWEEN 1 AND 2 INCHES OF
RAIN WILL FALL OVER THE SLOPES OF THE CASCADES AND MAY LEAD TO
UNSTABLE SOIL CONDITIONS RESULTING IN MINOR DEBRIS FLOWS AND ROCK
SLIDES ON STEEP SPARSELY VEGETATED SLOPES AND BURN SCARS. RIVERS
DRAINING THE CASCADES WILL EXPERIENCE MODERATE RISES.

SNOW LEVELS WILL FALL OVER THE WEEKEND WITH A POSSIBLE RETURN OF
WINTER WEATHER ON OR ABOUT TUESDAY.

IDZ001>004-026-027-WAZ031>038-041-043-044-111415-
NORTHERN PANHANDLE-COEUR D'ALENE AREA-IDAHO PALOUSE-
CENTRAL PANHANDLE MOUNTAINS-LEWISTON AREA-
LEWIS AND SOUTHERN NEZ PERCE COUNTIES-NORTHEAST BLUE MOUNTAINS-
LOWER GARFIELD AND ASOTIN COUNTIES-WASHINGTON PALOUSE-
MOSES LAKE AREA-UPPER COLUMBIA BASIN-SPOKANE AREA-
NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS-WENATCHEE AREA-
OKANOGAN VALLEY-WATERVILLE PLATEAU-
604 AM PST WED DEC 10 2014

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

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

PERIODIC PERIODS OF RAIN WILL OCCUR THROUGH MUCH OF THE WEEK
RESULTING IN UPWARDS OF 1 INCH OF RAINFALL IN THE VALLEYS AND
LOWER MOUNTAIN SLOPES NORTH OF THE COLUMBIA BASIN THROUGH
THURSDAY. SATURATED SOIL MAY PROMOTE LOCAL MUDSLIDES AND DEBRIS
FLOWS ON STEEP SPARSELY VEGETATED SLOPES.

SOME MODELS ARE INDICATING A RETURN TO MORE WINTER-LIKE CONDITIONS
AS EARLY AS TUESDAY AFTER A DRY BUT CLOUDY WEEKEND.

The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 10, 3:01 PM PSTWind AdvisoryOTXAsotin, Garfield28 hr

Nearby

Flood Watches in Washington, 2014Every flood watch in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.