Alert archive / Washington / River Flood Watches in 2018

River Flood Watch 7, NWS Spokane, WA

May 7, 2018Chelan County, Okanogan County, Washington

NWS Spokane, WA issued this river flood watch at May 7, 2018, 4:41 PM PDT for Chelan County, Okanogan County, Washington. It took effect at May 9, 2018, 10:01 AM PDT. It was in force for 4 days.

The area

The counties it named.

The facts

Issued
May 7, 2018, 4:41 PM PDT (23:41 UTC)
In effect from
May 9, 2018, 10:01 AM PDT
Expired
May 13, 2018, 5:10 PM PDT
In force
4 days
Issued by
NWS Spokane, WA
Area
Storm-based polygon
Flood severity
None

Counties Chelan County, WA, Okanogan County, WA

The radar

The Seattle radar (KATX), 172 km from the middle of the area, began a volume at 23:43 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 river

Written for the forecast point Similkameen River near Nighthawk (NITW1). The gauge peaked at 15.49 ft at May 10, 2018, 10:00 PM PDT.

actionminormoderatemajor12141605/0705/0805/0905/1005/1105/1205/1305/1405/15
Action stage
13 ft
Minor stage
14 ft
Moderate stage
15 ft
Major stage
16 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12442500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river 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 river flood watch went out at May 7, 2:59 PM PDT, 1 hour 42 minutes earlier.

Area forecast discussion, May 7, 2:59 PM PDT, 1 hour 42 minutes before
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Hazardous weather outlook, May 6, 8:57 PM PDT, 19 hours 44 minutes before
Hazardous Weather Outlook
National Weather Service Spokane WA
857 PM PDT Sun May 6 2018

IDZ001>004-026-027-WAZ031>038-041>044-081500-
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-
East Slopes Northern Cascades-Okanogan Valley-Waterville Plateau-
857 PM PDT Sun May 6 2018

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...TONIGHT

Many rivers across northern Washington and Idaho will continue to
run high. The rivers will be very cold with swift currents.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Warm weather through the middle of next week will keep water
levels on area rivers and streams very high due to snowmelt in
the mountains. Rivers will be very cold with swift currents.

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 11:20 AM PDTRiver Flood WarningOTXFerry13 days
May 6, 5:16 PM PDTSpecial Weather StatementOTXShoshone59 min
May 6, 6:16 PM PDTSpecial Weather StatementOTXShoshone44 min
May 6, 8:02 PM PDTAreal Flood WarningOTXBoundary15 hr
May 6, 8:14 PM PDTRiver Flood WatchOTXKootenai, Shoshone36 hr
May 6, 8:14 PM PDTRiver Flood WatchOTXShoshone10 hr
May 6, 8:14 PM PDTRiver Flood WatchOTXBenewah24 hr
May 7, 6:33 AM PDTAreal Flood WarningOTXShoshone5 hr
May 7, 10:27 AM PDTRiver Flood WarningOTXBenewah6 days
May 7, 11:00 AM PDTRiver Flood WarningOTXKootenai, Shoshone14 hr
May 7, 11:20 AM PDTRiver Flood WarningOTXBoundary5 days
May 7, 11:20 AM PDTRiver Flood WarningOTXShoshone13 hr

Nearby

River Flood Watches in Washington, 2018Every river flood watch in 2018

Sources

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