Alert archive / Kansas / Flash Flood Warnings in 2011

Flash Flood Warning 4, NWS Kansas City, MO

June 1, 2011Linn County, Kansas

NWS Kansas City, MO issued this flash flood warning at Jun 1, 2011, 4:43 PM CDT for Linn County, Kansas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 1, 2011, 4:43 PM CDT (21:43 UTC)
Expired
Jun 1, 2011, 7:30 PM CDT
In force
3 hr
Issued by
NWS Kansas City, MO
Area
Storm-based polygon
Flood severity
None

County Linn County, KS

The radar

The Pleasant Hill radar (KEAX), 79 km from the middle of the area, began a volume at 21:44 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, 9.7 hours before the alert went out and 105 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 2011-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2011-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2267 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

836 
WGUS53 KEAX 012143
FFWEAX
KSC107-020030-
/O.NEW.KEAX.FF.W.0004.110601T2143Z-110602T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
443 PM CDT WED JUN 1 2011

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL LINN COUNTY IN EAST CENTRAL KANSAS...

* UNTIL 730 PM CDT

* AT 442 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE WARNED 
AREA.

&&

LAT...LON 3835 9478 3821 9473 3818 9500 3831 9503

$$

DEROCHE
2 follow-up statements
074 
WGUS73 KEAX 012238
FFSEAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
538 PM CDT WED JUN 1 2011

KSC107-020030-
/O.CON.KEAX.FF.W.0004.000000T0000Z-110602T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINN KS-
538 PM CDT WED JUN 1 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL LINN COUNTY IN
EAST CENTRAL KANSAS UNTIL 730 PM CDT...

AT 535 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE 
HEAVY RAINFALL HAS MOVED NORTH AND EAST THE WARNED AREA. 
HOWEVER...ADDITIONAL SCATTERED LIGHT TO OCCASIONALLY MODERATE 
RAINFALL CONTINUED ACROSS PORTIONS OF THE WARNED AREA. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY.

&&

LAT...LON 3835 9478 3821 9473 3818 9500 3831 9503

$$

DEROCHE
096 
WGUS73 KEAX 020029
FFSEAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
729 PM CDT WED JUN 1 2011

KSC107-020045-
/O.EXP.KEAX.FF.W.0004.000000T0000Z-110602T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINN KS-
729 PM CDT WED JUN 1 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL LINN COUNTY
IN EAST CENTRAL KANSAS HAS BEEN ALLOWED TO EXPIRE...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3835 9478 3821 9473 3818 9500 3831 9503

$$

DEROCHE

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 1, 3:07 PM CDTSpecial Weather StatementEAXLinn38 min
Jun 1, 3:56 PM CDTSpecial Weather StatementEAXLinn49 min
Jun 1, 3:58 PM CDTAreal Flood AdvisoryEAXLinn4 hr
Jun 1, 5:02 PM CDTSpecial Weather StatementEAXMiami28 min
Jun 1, 5:18 PM CDTSpecial Weather StatementEAXLinn27 min
Jun 1, 6:13 PM CDTSpecial Weather StatementEAXAtchison32 min
Jun 1, 6:59 PM CDTSpecial Weather StatementEAXJohnson31 min

Nearby

Flash Flood Warnings in Kansas, 2011Every flash flood warning in 2011

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.