Alert archive / Kansas / Areal Flood Warnings in 2018

Areal Flood Warning 9, NWS Topeka, KS

September 4, 2018Cloud County, Kansas

NWS Topeka, KS issued this areal flood warning at Sep 4, 2018, 12:45 AM CDT for Cloud County, Kansas. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 4, 2018, 12:45 AM CDT (05:45 UTC)
Expired: Sep 4, 2018, 12:30 PM CDT
In force: 12 hr
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Flood severity: None

County Cloud County, KS

The radar

The Grand Island radar (KUEX), 115 km from the middle of the area, began a volume at 05:46 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

Omaha, NE (KOAX), launched 00:00Z, 5.8 hours before the alert went out and 231 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 102 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 954 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Topeka, KS wrote its last area forecast discussion before this areal flood warning went out at Sep 4, 12:10 AM CDT, 35 minutes earlier.

Area forecast discussion, Sep 4, 12:10 AM CDT, 35 minutes before

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Hazardous weather outlook, Sep 3, 4:23 PM CDT, 8 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Topeka KS
423 PM CDT Mon Sep 3 2018

KSZ008>012-020>024-026-034>040-054>056-058-059-042130-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley-
Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson-
423 PM CDT Mon Sep 3 2018

This hazardous weather outlook is for east central...north
central and northeast Kansas.

.DAY ONE...Tonight.

Thunderstorms are possible across the entire area tonight.
Locally heavy rainfall could occur, with the greatest chances in
north central Kansas. With ground conditions saturated from recent
excessive rainfall events, flash flooding is possible. A Flash
Flood Watch is in effect for north central and portions of
northeast Kansas tonight.

Minor river flooding will develop or continue on several rivers
and creeks in north central and northeast Kansas tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The potential for additional moderate to heavy rainfall exists
Tuesday. The Flash Flood Watch continues for the aforementioned
areas through Tuesday afternoon. Showers and thunderstorms
continue to be possible through the late portions of the week and
localized flash flooding could again occur.

Minor river flooding of a few rivers and creeks in north central
and northeast Kansas will persist into Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

More detailed information can be accessed at...
http://www.weather.gov/top/sitrep

In the hours before

Local storm report, Sep 3, 7:15 PM CDT, 5 hours 30 minutes before

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Local storm report, Sep 3, 8:14 PM CDT, 4 hours 31 minutes before

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Local storm report, Sep 3, 8:32 PM CDT, 4 hours 13 minutes before

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Local storm report, Sep 3, 8:39 PM CDT, 4 hours 6 minutes before

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Local storm report, Sep 3, 9:41 PM CDT, 3 hours 4 minutes before

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The office that day

Everything else NWS Topeka, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 3, 7:05 PM CDT	Flash Flood Warning	TOP	Cloud	6 hr
Sep 3, 8:27 PM CDT	Areal Flood Advisory	TOP	Republic, Washington	3 hr
Sep 3, 10:28 PM CDT	Areal Flood Advisory	TOP	Marshall, Washington	3 hr
Sep 4, 12:57 AM CDT	River Flood Warning	TOP	Washington	23 hr
Sep 4, 9:59 AM CDT	River Flood Warning	TOP	Marshall	3 days

Nearby

Areal Flood Warnings in Kansas, 2018 Every areal flood warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.