Alert archive / Montana / River Flood Advisories in 2020

River Flood Advisory 1, NWS Missoula, MT

May 1, 2020Missoula County, Montana

NWS Missoula, MT issued this river flood advisory at May 1, 2020, 8:02 AM MDT for Missoula County, Montana. It took effect at May 1, 2020, 8:57 AM MDT. It was in force for 48 hr.

The area

The counties it named.

The facts

Issued: May 1, 2020, 8:02 AM MDT (14:02 UTC)
In effect from: May 1, 2020, 8:57 AM MDT
Expired: May 3, 2020, 8:33 AM MDT
In force: 48 hr
Issued by: NWS Missoula, MT
Area: Storm-based polygon

County Missoula County, MT

The radar

The Missoula radar (KMSX), 5 km from the middle of the area, began a volume at 14:01 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 Clark Fork River above Missoula (ABOM8). The gauge peaked at 7.40 ft at May 2, 2020, 12:00 AM MDT.

Action stage: 7 ft
Minor stage: 7.5 ft
Moderate stage: 11 ft
Major stage: 13 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12340500, 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 advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Missoula, MT wrote its last area forecast discussion before this river flood advisory went out at Apr 30, 1:59 PM MDT, 18 hours 3 minutes earlier.

Area forecast discussion, Apr 30, 1:59 PM MDT, 18 hours 3 minutes before

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Nearby

River Flood Advisories in Montana, 2020 Every river flood advisory 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; the gauge from the NWS water service and the USGS.