Alert archive / Kansas / Areal Flood Advisories in 2017

Areal Flood Advisory 21, NWS Topeka, KS

August 5, 2017Lyon County, Morris County, Osage County, Kansas

NWS Topeka, KS issued this areal flood advisory at Aug 5, 2017, 9:11 AM CDT for Lyon County, Morris County, Osage County, Kansas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Aug 5, 2017, 9:11 AM CDT (14:11 UTC)
Expired: Aug 5, 2017, 12:15 PM CDT
In force: 3 hr
Issued by: NWS Topeka, KS
Area: Storm-based polygon

Counties Lyon County, KS, Morris County, KS, Osage County, KS

The radar

The Topeka radar (KTWX), 45 km from the middle of the area, began a volume at 14:14 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 (KFOE), launched 12:00Z, 2.2 hours before the alert went out and 64 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1664 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 223 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 areal flood advisory 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 advisory went out at Aug 5, 6:35 AM CDT, 2 hours 36 minutes earlier.

Area forecast discussion, Aug 5, 6:35 AM CDT, 2 hours 36 minutes before

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Hazardous weather outlook, Aug 5, 4:55 AM CDT, 4 hours 16 minutes before

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In the hours before

Special weather statement, Aug 5, 4:06 AM CDT, 5 hours 5 minutes before

Special Weather Statement
National Weather Service Topeka KS
406 AM CDT SAT AUG 5 2017

KSZ037-038-054-050930-
Wabaunsee-Lyon-Morris-
406 AM CDT SAT AUG 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MORRIS...SOUTH
CENTRAL WABAUNSEE AND NORTHWESTERN LYON COUNTIES UNTIL 430 AM CDT...

At 406 AM CDT, Doppler radar was tracking a strong thunderstorm near
Council Grove, moving northeast at 40 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Council Grove, Allen, Bushong, Dunlap and Council Grove Lake.

LAT...LON 3867 9660 3893 9620 3873 9598 3852 9647
      3852 9650
TIME...MOT...LOC 0906Z 241DEG 35KT 3864 9646

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 4:06 AM CDT	Special Weather Statement	TOP	Wabaunsee	24 min
Aug 5, 5:32 AM CDT	Areal Flood Advisory	TOP	Washington	3 hr
Aug 5, 5:34 AM CDT	Areal Flood Advisory	TOP	Morris	3 hr
Aug 5, 6:43 AM CDT	Areal Flood Advisory	TOP	Clay, Cloud	3 hr
Aug 5, 7:08 AM CDT	Areal Flood Advisory	TOP	Clay, Dickinson, Geary, Morris, Pottawatomie, Riley	3 hr
Aug 5, 10:43 AM CDT	Areal Flood Advisory	TOP	Anderson, Coffey, Lyon	3 hr

Nearby

Areal Flood Advisories in Kansas, 2017 Every areal flood advisory in 2017

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.