Alert archive / Iowa / River Flood Watches in 2018

River Flood Watch 39, NWS Des Moines, IA

August 20, 2018Dallas County, Greene County, Iowa

NWS Des Moines, IA issued this river flood watch at Aug 20, 2018, 8:42 PM CDT for Dallas County, Greene County, Iowa. It took effect at Aug 22, 2018, 7:51 PM CDT. It was in force for 42 min.

The area

The counties it named.

The facts

Issued: Aug 20, 2018, 8:42 PM CDT (01:42 UTC)
In effect from: Aug 22, 2018, 7:51 PM CDT
Expired: Aug 22, 2018, 8:33 PM CDT
In force: 42 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Dallas County, IA, Greene County, IA

The radar

The Des Moines radar (KDMX), 44 km from the middle of the area, began a volume at 01:44 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 North Raccoon River near Perry (PROI4).

Action stage: 14 ft
Minor stage: 15 ft
Moderate stage: 18 ft
Major stage: 20 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record, 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 Des Moines, IA wrote its last area forecast discussion before this river flood watch went out at Aug 20, 6:37 PM CDT, 2 hours 5 minutes earlier.

Area forecast discussion, Aug 20, 6:37 PM CDT, 2 hours 5 minutes before

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Hazardous weather outlook, Aug 20, 3:24 PM CDT, 5 hours 18 minutes before

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In the hours before

Local storm report, Aug 20, 6:39 PM CDT, 2 hours 3 minutes before

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Local storm report, Aug 20, 7:05 PM CDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
705 PM CDT MON AUG 20 2018

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

0705 PM     HEAVY RAIN       3 NW STRATFORD          42.29N 93.98W
08/20/2018  M4.05 INCH       WEBSTER            IA   TRAINED SPOTTER

            4.05 INCHES.

&&

ANSORGE

Local storm report, Aug 20, 7:09 PM CDT, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
709 PM CDT MON AUG 20 2018

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

0708 PM     HEAVY RAIN       KELLERTON               40.71N 94.05W
08/20/2018  M3.90 INCH       RINGGOLD           IA   TRAINED SPOTTER

            3.90 INCHES LAST 11 HOURS.

&&

ANSORGE

Local storm report, Aug 20, 7:23 PM CDT, 1 hour 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
723 PM CDT MON AUG 20 2018

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

0721 PM     HEAVY RAIN       3 SW PIONEER            42.62N 94.43W
08/20/2018  E5.80 INCH       WEBSTER            IA   TRAINED SPOTTER

            ESTIMATED 5.8 INCHES.

&&

ANSORGE

Local storm report, Aug 20, 7:27 PM CDT, 1 hour 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
727 PM CDT MON AUG 20 2018

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

0705 PM     HEAVY RAIN       3 NW STRATFORD          42.29N 93.98W
08/20/2018  M4.50 INCH       WEBSTER            IA   TRAINED SPOTTER

            CORRECTS PREVIOUS HEAVY RAIN REPORT FROM 3
            NW STRATFORD. 4.50 INCHES.

&&

ANSORGE

Local storm report, Aug 20, 7:30 PM CDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
730 PM CDT MON AUG 20 2018

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

0729 PM     HEAVY RAIN       PATON                   42.16N 94.26W
08/20/2018  E4.50 INCH       GREENE             IA   TRAINED SPOTTER

&&

ANSORGE

Nearby

River Flood Watches in Iowa, 2018 Every 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.