Alert archive / Kansas / Flash Flood Warnings in 2016

Flash Flood Warning 37, NWS Topeka, KS

September 24, 2016Nemaha County, Kansas

NWS Topeka, KS issued this flash flood warning at Sep 24, 2016, 6:40 PM CDT for Nemaha County, Kansas. It was in force for 4 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Sep 24, 2016, 6:40 PM CDT (23:40 UTC)
Expired
Sep 24, 2016, 10:45 PM CDT
In force
4 hr
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Flood severity
None

County Nemaha County, KS

The radar

The Topeka radar (KTWX), 86 km from the middle of the area, began a volume at 23:41 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.

What was reported inside it

TimeReportWhereRemark
Sep 24, 6:40 PM CDTFLASH FLOODCentralia, KSFLOODING IS OCCURRING IN SEVERAL PARTS OF NEMAHA COUNTY, INCLUDING CENTRALIA. K187 IS CLOSED BETWEEN MM 3 AND MM 4, A COUNTY ROAD IS CLOSED NEAR SENECA, AND PORTIONS OF TENNESSEE CREEK AND THE NEMAHA RIVER ARE OUT OF THEIR BANKS NEAR SENECA.
Sep 24, 7:34 PM CDTFLASH FLOOD2 Sse Seneca, KSFLASH FLOODING CONTINUES IN NEMAHA COUNTY, SPECIFICALLY NEAR THE TOWNS OF SENECA AND CENTRALIA.
Sep 24, 9:40 PM CDTHEAVY RAIN 2.75Sabetha, KS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 11.7 hours before the alert went out and 87 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2016-09-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 991 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 2016-09-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
991 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
977 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

024 
WGUS53 KTOP 242340
FFWTOP
KSC131-250345-
/O.NEW.KTOP.FF.W.0037.160924T2340Z-160925T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TOPEKA KS
640 PM CDT SAT SEP 24 2016

THE NATIONAL WEATHER SERVICE IN TOPEKA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NEMAHA COUNTY IN NORTHEASTERN KANSAS...

* UNTIL 1045 PM CDT

* AT 640 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO
  THREE INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS
  EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SABETHA...SENECA...CENTRALIA...WETMORE...BERN...CORNING...GOFF...
  ONEIDA...WOODLAWN AND BAILEYVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3957 9579 3957 9624 4000 9624 4000 9579

$$

27
2 follow-up statements
251 
WGUS73 KTOP 250038
FFSTOP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
738 PM CDT SAT SEP 24 2016

KSC131-250345-
/O.CON.KTOP.FF.W.0037.000000T0000Z-160925T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEMAHA-
738 PM CDT SAT SEP 24 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
NEMAHA COUNTY...

AT 736 PM CDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING IN
NEMAHA COUNTY, INCLUDING ALONG K187 AND NEAR THE TOWNS OF SENECA AND
CENTRALIA. MORE THAN 3 INCHES OF RAIN HAS BEEN REPORTED WITHIN THE
WARNED AREA AND SOME ADDITIONAL RAIN IS POSSIBLE THROUGH
TONIGHT. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SABETHA...SENECA...CENTRALIA...WETMORE...BERN...CORNING...GOFF...
ONEIDA...WOODLAWN AND BAILEYVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3957 9579 3957 9624 4000 9624 4000 9579

$$

BB
754 
WGUS73 KTOP 250341 RRA
FFSTOP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
1041 PM CDT SAT SEP 24 2016

KSC131-250351-
/O.EXP.KTOP.FF.W.0037.000000T0000Z-160925T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEMAHA-
1041 PM CDT SAT SEP 24 2016

...THE FLASH FLOOD WARNING FOR NEMAHA COUNTY WILL EXPIRE AT 1045 PM
CDT...

THE HEAVY RAIN HAS ENDED. PLEASE CONTINUE TO HEED ANY REMAINING ROAD
CLOSURES.

LAT...LON 3957 9579 3957 9624 4000 9624 4000 9579

$$

SANDERS

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 24, 1:26 PM CDTSpecial Weather StatementTOPMarshall34 min
Sep 24, 2:58 PM CDTSpecial Weather StatementTOPPottawatomie32 min
Sep 24, 5:33 PM CDTAreal Flood AdvisoryTOPPottawatomie, Riley3 hr
Sep 24, 6:25 PM CDTSpecial Weather StatementTOPOsage35 min
Sep 24, 6:35 PM CDTAreal Flood AdvisoryTOPNemaha3 hr

Nearby

Flash Flood Warnings in Kansas, 2016Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.