Alert archive / Kansas / Flash Flood Watches in 2007

Flash Flood Watch 3, NWS Topeka, KS

May 23, 200712 counties in Kansas

NWS Topeka, KS issued this flash flood watch at May 23, 2007, 2:51 AM CDT for 12 counties in Kansas. It took effect at May 23, 2007, 2:12 PM CDT. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued: May 23, 2007, 2:51 AM CDT (07:51 UTC)
In effect from: May 23, 2007, 2:12 PM CDT
Expired: May 24, 2007, 7:00 AM CDT
In force: 17 hr
Issued by: NWS Topeka, KS
Flood severity: None

Counties Clay County, KS, Cloud County, KS, Dickinson County, KS, Geary County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Washington County, KS

The radar

The Topeka radar (KTWX), 74 km from the middle of the area, began a volume at 07:54 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

Lamont, OK (KLMN), launched 00:00Z, 7.9 hours before the alert went out and 309 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: 1403 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 333 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.3

Open this sounding in Storm Lab

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 Topeka, KS wrote its last area forecast discussion before this flash flood watch went out at May 22, 4:19 PM CDT, 10 hours 32 minutes earlier.

Area forecast discussion, May 22, 4:19 PM CDT, 10 hours 32 minutes before

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Hazardous weather outlook, May 22, 5:00 PM CDT, 9 hours 51 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
May 23, 12:52 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Geary	38 min
May 23, 1:35 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Riley	55 min
May 23, 2:06 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Riley	39 min
May 23, 2:23 PM CDT	Severe Thunderstorm Warning	TOP	Marshall	52 min
May 23, 2:46 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie	33 min
May 23, 3:02 PM CDT	Severe Thunderstorm Warning	TOP	Dickinson	43 min
May 23, 3:13 PM CDT	Severe Thunderstorm Warning	TOP	Nemaha	47 min
May 23, 3:45 PM CDT	Severe Thunderstorm Warning	TOP	Dickinson, Geary, Morris	45 min

Nearby

Flash Flood Watches in Kansas, 2007 Every flash flood watch in 2007

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.