Alert archive / Kansas / Flash Flood Watches in 2007

Flash Flood Watch 7, NWS Topeka, KS

July 30, 20079 counties in Kansas

NWS Topeka, KS issued this flash flood watch at Jul 30, 2007, 3:50 PM CDT for 9 counties in Kansas. It took effect at Jul 30, 2007, 7:00 PM CDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jul 30, 2007, 3:50 PM CDT (20:50 UTC)
In effect from: Jul 30, 2007, 7:00 PM CDT
Expired: Jul 31, 2007, 7:00 AM CDT
In force: 12 hr
Issued by: NWS Topeka, KS
Flood severity: None

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

The radar

The Topeka radar (KTWX), 86 km from the middle of the area, began a volume at 20:50 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 12:00Z, 8.8 hours before the alert went out and 135 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: 238 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 660 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 30, 3:37 PM CDT, 13 minutes earlier.

Area forecast discussion, Jul 30, 3:37 PM CDT, 13 minutes before

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Hazardous weather outlook, Jul 30, 5:09 AM CDT, 10 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TOPEKA KS
509 AM CDT MON JUL 30 2007

KSZ008>012-020>024-026-034>040-054>056-058-059-311015-
REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY-
POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS-
WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON-
509 AM CDT MON JUL 30 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL...NORTH
CENTRAL AND NORTHEAST KANSAS.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS CAN BE EXPECTED TODAY AND TONIGHT. SOME OF
THE STORMS MAY PRODUCE HEAVY RAINFALL. SOME LOCALIZED FLOODING IS
POSSIBLE TODAY AND TONIGHT...ESPECIALLY SOUTH OF INTERSTATE 70.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THUNDERSTORM CHANCES WILL CONTINUE ACROSS THE OUTLOOK AREA
THROUGH WEDNESDAY NIGHT. SOME OF THESE THUNDERSTORMS WILL BE
CAPABLE OF PRODUCING HEAVY RAINFALL TUESDAY AFTERNOON AND AGAIN
WEDNESDAY AFTERNOON...MAINLY ACROSS NORTH CENTRAL KANSAS.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT RAINFALL AMOUNTS OVER ONE INCH
TO THE NATIONAL WEATHER SERVICE IN TOPEKA.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:41 AM CDT	Flash Flood Warning	TOP	Anderson	3 hr

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.