Alert archive / Washington / Flash Flood Watches in 2020

Flash Flood Watch 1, NWS Spokane, WA

May 18, 2020Chelan County, Okanogan County, Washington

NWS Spokane, WA issued this flash flood watch at May 18, 2020, 3:49 AM PDT for Chelan County, Okanogan County, Washington. It took effect at May 18, 2020, 1:00 PM PDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: May 18, 2020, 3:49 AM PDT (10:49 UTC)
In effect from: May 18, 2020, 1:00 PM PDT
Expired: May 18, 2020, 8:52 PM PDT
In force: 8 hr
Issued by: NWS Spokane, WA
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 10:56 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.

What forecasters said that day

The local office's own words before this flash 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 flash flood watch went out at May 18, 3:04 AM PDT, 45 minutes earlier.

Area forecast discussion, May 18, 3:04 AM PDT, 45 minutes before

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Hazardous weather outlook, May 17, 10:47 PM PDT, 5 hours 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 10:43 AM PDT	River Flood Watch	OTX	Douglas, Okanogan	24 hr
May 18, 10:49 AM PDT	River Flood Watch	OTX	Ferry, Okanogan	8 hr
May 18, 1:09 PM PDT	Special Weather Statement	OTX	Lincoln	51 min
May 18, 1:20 PM PDT	Areal Flood Advisory	OTX	Lincoln	115 min
May 18, 1:43 PM PDT	Special Weather Statement	OTX	Stevens	47 min
May 18, 4:22 PM PDT	Areal Flood Advisory	OTX	Douglas, Grant	3 hr
May 17, 5:03 PM PDT	Special Weather Statement	OTX	Latah	27 min
May 17, 5:16 PM PDT	Special Weather Statement	OTX	Bonner	44 min
May 17, 5:21 PM PDT	Special Weather Statement	OTX	Kootenai	24 min
May 17, 5:55 PM PDT	Special Weather Statement	OTX	Kootenai	35 min
May 17, 6:16 PM PDT	Special Weather Statement	OTX	Bonner	29 min
May 17, 6:18 PM PDT	Special Weather Statement	OTX	Shoshone	27 min
May 18, 3:24 PM PDT	Special Weather Statement	OTX	Latah	51 min

Nearby

Flash Flood Watches in Washington, 2020 Every flash flood watch in 2020

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.