Alert archive / Kansas / Flash Flood Watches in 2009
Flash Flood Watch 5, NWS Topeka, KS
NWS Topeka, KS issued this flash flood watch at Jul 20, 2009, 2:56 PM CDT for 13 counties in Kansas. It took effect at Jul 20, 2009, 7:00 PM CDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 20, 2009, 2:56 PM CDT (19:56 UTC)
- In effect from
- Jul 20, 2009, 7:00 PM CDT
- Expired
- Jul 21, 2009, 3:37 AM CDT
- In force
- 9 hr
- Issued by
- NWS Topeka, KS
- Flood severity
- None
Counties Brown County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Marshall County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS
The radar
The Topeka radar (KTWX), 34 km from the middle of the area, began a volume at 19:58 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 12:00Z, 7.9 hours before the alert went out and 318 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.
- Mixed-layer CAPE
- 207 J/kg
- Mixed-layer CIN
- -315 J/kg
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 Jul 20, 1:01 PM CDT, 1 hour 55 minutes earlier.
Area forecast discussion, Jul 20, 1:01 PM CDT, 1 hour 55 minutes before
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</html>The office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 6:24 PM CDT | Severe Thunderstorm Warning | TOP | Morris | 51 min |
Nearby
Flash Flood Watches in Kansas, 2009Every flash flood watch in 2009
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.