Alert archive / Kansas / Areal Flood Warnings in 2020

Areal Flood Warning 2, NWS Topeka, KS

April 12, 2020Pottawatomie County, Kansas

NWS Topeka, KS issued this areal flood warning at Apr 12, 2020, 3:49 AM CDT for Pottawatomie County, Kansas. It was in force for 6 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: Apr 12, 2020, 3:49 AM CDT (08:49 UTC)
Expired: Apr 12, 2020, 9:45 AM CDT
In force: 6 hr
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Flood severity: None

County Pottawatomie County, KS

The radar

The Topeka radar (KTWX), 44 km from the middle of the area, began a volume at 08:49 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

Topeka, KS (KTOP), launched 00:00Z, 8.8 hours before the alert went out and 74 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: 934 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 2123 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

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 Apr 11, 11:52 PM CDT, 3 hours 57 minutes earlier.

Area forecast discussion, Apr 11, 11:52 PM CDT, 3 hours 57 minutes before

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Hazardous weather outlook, Apr 12, 1:05 AM CDT, 2 hours 44 minutes before

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In the hours before

Local storm report, Apr 11, 11:41 PM CDT, 4 hours 8 minutes before

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Local storm report, Apr 11, 11:56 PM CDT, 3 hours 53 minutes before

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Special weather statement, Apr 12, 12:18 AM CDT, 3 hours 31 minutes before

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Local storm report, Apr 12, 12:19 AM CDT, 3 hours 30 minutes before

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Special weather statement, Apr 12, 12:45 AM CDT, 3 hours 4 minutes before

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Special weather statement, Apr 12, 1:08 AM CDT, 2 hours 41 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
Apr 11, 7:03 PM CDT	Severe Thunderstorm Warning	TOP	Wabaunsee	57 min
Apr 11, 7:23 PM CDT	Special Weather Statement	TOP	Morris	37 min
Apr 11, 7:35 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage, Shawnee, Wabaunsee	55 min
Apr 11, 7:40 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Shawnee, Wabaunsee	50 min
Apr 11, 7:56 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson, Shawnee	49 min
Apr 11, 8:04 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson	26 min
Apr 11, 8:08 PM CDT	Special Weather Statement	TOP	Lyon	52 min
Apr 11, 8:09 PM CDT	Severe Thunderstorm Warning	TOP	Osage, Shawnee, Wabaunsee	36 min
Apr 11, 8:27 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Shawnee, Wabaunsee	33 min
Apr 11, 8:48 PM CDT	Special Weather Statement	TOP	Shawnee	42 min
Apr 11, 9:17 PM CDT	Special Weather Statement	TOP	Jefferson	43 min
Apr 11, 9:33 PM CDT	Special Weather Statement	TOP	Jackson	27 min
Apr 11, 9:40 PM CDT	Severe Thunderstorm Warning	TOP	Jackson	50 min
Apr 11, 9:46 PM CDT	Special Weather Statement	TOP	Pottawatomie	29 min
Apr 11, 10:16 PM CDT	Severe Thunderstorm Warning	TOP	Brown, Jackson, Marshall, Nemaha, Pottawatomie, Riley	44 min
Apr 11, 10:42 PM CDT	Special Weather Statement	TOP	Jackson	33 min
Apr 11, 10:57 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Marshall, Nemaha, Pottawatomie, Riley	48 min
Apr 11, 11:20 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson	40 min
Apr 11, 11:22 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie	38 min
Apr 11, 11:26 PM CDT	Flash Flood Warning	TOP	Jackson	4 hr
Apr 11, 11:39 PM CDT	Flash Flood Warning	TOP	Pottawatomie	4 hr
Apr 11, 11:58 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie	47 min
Apr 12, 12:18 AM CDT	Special Weather Statement	TOP	Jackson	27 min
Apr 12, 12:45 AM CDT	Special Weather Statement	TOP	Pottawatomie	30 min
Apr 12, 1:08 AM CDT	Special Weather Statement	TOP	Jackson	37 min
Apr 12, 3:24 AM CDT	Areal Flood Warning	TOP	Jackson	6 hr
Apr 12, 4:19 AM CDT	Freeze Warning	TOP	Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more	30 hr
Apr 12, 10:51 AM CDT	Special Weather Statement	TOP	Jefferson	24 min
Apr 12, 11:14 AM CDT	Special Weather Statement	TOP	Jefferson	31 min
Apr 12, 11:26 AM CDT	Special Weather Statement	TOP	Douglas	34 min

Nearby

Areal Flood Warnings in Kansas, 2020 Every areal flood warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.