Alert archive / Kansas / Flash Flood Warnings in 2017

Flash Flood Warning 32, NWS Kansas City, MO

August 21, 2017Atchison County, Leavenworth County, Kansas; Buchanan County, Platte County, Missouri

NWS Kansas City, MO issued this flash flood warning at Aug 21, 2017, 9:09 PM CDT for Atchison County, Leavenworth County, Kansas; Buchanan County, Platte County, Missouri. It was in force for 6 hr. 1 report 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
Aug 21, 2017, 9:09 PM CDT (02:09 UTC)
Expired
Aug 22, 2017, 3:15 AM CDT
In force
6 hr
Issued by
NWS Kansas City, MO
Area
Storm-based polygon
Flood severity
None

Counties Atchison County, KS, Leavenworth County, KS, Buchanan County, MO, Platte County, MO

The radar

The Pleasant Hill radar (KEAX), 109 km from the middle of the area, began a volume at 02:08 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
Aug 21, 10:25 PM CDTFLASH FLOOD1 Ne Lansing, KSKS HWY 5 SHUT DOWN DUE TO WATER OVER ROAD AT SEVENMILE CREEK.

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 00:00Z, 2.2 hours before the alert went out and 72 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 00:00Z on 2017-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2114 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2017-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 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
2114 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1421 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.6
Supercell composite
9.7

Open this sounding in Storm Lab

The text

As transmitted.

769 
WGUS53 KEAX 220209
FFWEAX
KSC005-103-MOC021-165-220815-
/O.NEW.KEAX.FF.W.0032.170822T0209Z-170822T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
909 PM CDT MON AUG 21 2017

The National Weather Service in Pleasant Hill has issued a

* Flash Flood Warning for...
  Northern Leavenworth County in northeastern Kansas...
  Atchison County in northeastern Kansas...
  Southwestern Buchanan County in northwestern Missouri...
  Platte County in west central Missouri...

* Until 315 AM CDT Tuesday

* At 906 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Hourly rainfall rates of 2 to 3 
  inches per hour are occurring with these storms. These storms may 
  produce 3 to 6 inches of rain across the warned area, especially 
  southern Atchison county in Kansas. This replaces the previous 
  flash flood warning for Atchison County Kansas.

* Some locations that will experience flooding include...
  Kansas City, Leavenworth, Lansing, Atchison, Platte City, Weatherby
  Lake, Weston, Lake Waukomis, Edgerton, Effingham, Dearborn, Camden
  Point, Ferrelview, Rushville, Lancaster, Easton, Tracy, Muscotah,
  Lewis And Clark Village and Farley.

This includes the following highways...
 Interstate 29 between mile markers 8 and 34.
 Interstate 435 between mile markers 24 and 39.

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 3965 9556 3965 9511 3962 9510 3962 9506
      3965 9504 3953 9460 3923 9460 3929 9518
      3942 9518 3942 9557

$$

CDB
1 follow-up statement
445 
WGUS73 KEAX 220413
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
1113 PM CDT MON AUG 21 2017

KSC005-103-MOC021-165-220815-
/O.CON.KEAX.FF.W.0032.000000T0000Z-170822T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Leavenworth KS-Atchison KS-Buchanan MO-Platte MO-
1113 PM CDT MON AUG 21 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR
NORTHERN LEAVENWORTH...ATCHISON...SOUTHWESTERN BUCHANAN AND PLATTE
COUNTIES...

At 1110 PM CDT, Doppler radar indicated that much of the heavy rain 
had ended across the warned area. Radar estimates that 6 to 8 inches 
of rain has fallen in Atchison County, KS with other areas in the 
warning seeing between 3 and 6 inches. Flash flooding is likely 
already occurring. Additionally, more heavy rain is expected to move 
into the area later tonight and may add another 1 to 3 inches of 
rain. 

Some locations that will experience flooding include...
Kansas City, Leavenworth, Lansing, Atchison, Platte City, Weatherby
Lake, Weston, Lake Waukomis, Edgerton, Effingham, Dearborn, Camden
Point, Ferrelview, Rushville, Lancaster, Easton, Tracy, Muscotah,
Lewis And Clark Village and Farley.

This includes the following highways...
 Interstate 29 between mile markers 8 and 34.
 Interstate 435 between mile markers 24 and 39.

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 3965 9556 3965 9511 3962 9510 3962 9506
      3965 9504 3953 9460 3923 9460 3929 9518
      3942 9518 3942 9557

$$

CDB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 7:22 PM CDTFlash Flood WarningEAXAtchison6 hr
Aug 21, 8:41 PM CDTSevere Thunderstorm WarningEAXAtchison, Leavenworth32 min
Aug 21, 8:52 PM CDTSpecial Weather StatementEAXJohnson, Leavenworth, Wyandotte38 min
Aug 21, 9:26 PM CDTSevere Thunderstorm WarningEAXJohnson, Wyandotte34 min
Aug 21, 9:30 PM CDTSevere Thunderstorm WarningEAXJohnson, Leavenworth30 min
Aug 21, 9:53 PM CDTFlash Flood WarningEAXJohnson, Leavenworth, Wyandotte6 hr
Aug 21, 9:55 PM CDTSevere Thunderstorm WarningEAXJohnson, Leavenworth, Wyandotte35 min
Aug 21, 10:22 PM CDTSevere Thunderstorm WarningEAXJohnson, Miami18 min
Aug 21, 10:46 PM CDTFlash Flood WarningEAXJohnson6 hr
Aug 21, 10:48 PM CDTRiver Flood WarningEAXAtchison, Leavenworth51 hr
Aug 21, 10:48 PM CDTRiver Flood WarningEAXLeavenworth50 hr
Aug 21, 11:07 PM CDTRiver Flood WarningEAXJohnson28 hr
Aug 21, 11:12 PM CDTRiver Flood WarningEAXJohnson33 hr
Aug 21, 11:25 PM CDTRiver Flood WarningEAXJohnson30 hr
Aug 21, 11:43 PM CDTRiver Flood WarningEAXJohnson30 hr
Aug 21, 11:45 PM CDTFlash Flood WarningEAXMiami8 hr
Aug 22, 12:04 AM CDTFlash Flood Warning EmergencyEAXJohnson, Leavenworth, Wyandotte8 hr
Aug 22, 12:51 AM CDTRiver Flood WarningEAXJohnson34 hr
Aug 22, 2:41 AM CDTSpecial Weather StatementEAXJohnson34 min
Aug 22, 3:09 AM CDTAreal Flood WarningEAXAtchison6 hr
Aug 22, 3:15 AM CDTFlash Flood WarningEAXLinn, Miami6 hr
Aug 22, 4:34 AM CDTRiver Flood WarningEAXMiami3 days
Aug 22, 4:34 AM CDTRiver Flood WarningEAXLinn5 days
Aug 22, 7:37 AM CDTAreal Flood WarningEAXAtchison, Johnson, Leavenworth, Miami, Wyandotte12 hr
Aug 22, 8:46 AM CDTRiver Flood WarningEAXLinn5 days
Aug 22, 9:01 AM CDTAreal Flood WarningEAXLinn, Miami60 hr
Aug 21, 7:14 PM CDTSpecial Weather StatementEAXCooper31 min
Aug 21, 8:02 PM CDTSpecial Weather StatementEAXClay, Platte43 min
Aug 21, 9:45 PM CDTFlash Flood WarningEAXClay6 hr
Aug 21, 9:54 PM CDTRiver Flood WarningEAXClay, Platte34 hr
Aug 21, 10:02 PM CDTFlash Flood WarningEAXClay6 hr
Aug 21, 10:20 PM CDTRiver Flood WarningEAXCooper, Saline7 days
Aug 21, 10:20 PM CDTRiver Flood WarningEAXRay45 hr
Aug 21, 10:23 PM CDTRiver Flood WarningEAXCarroll, Lafayette, Saline59 hr
Aug 22, 12:42 AM CDTAreal Flood AdvisoryEAXCass, Henry, Johnson, Lafayette6 hr
Aug 22, 12:51 AM CDTRiver Flood WarningEAXJackson37 hr
Aug 22, 12:51 AM CDTRiver Flood WarningEAXJackson33 hr
Aug 22, 12:51 AM CDTRiver Flood WarningEAXJackson36 hr
Aug 22, 1:45 AM CDTFlash Flood WarningEAXCass, Henry, Johnson6 hr
Aug 22, 1:47 AM CDTRiver Flood WarningEAXCass, Henry, Johnson4 days
Aug 22, 1:47 AM CDTRiver Flood WarningEAXBates, Cass, Henry4 days
Aug 22, 2:23 AM CDTRiver Flood WarningEAXJackson19 hr
Aug 22, 2:23 AM CDTRiver Flood WarningEAXJackson39 hr
Aug 22, 2:40 AM CDTRiver Flood WarningEAXCarroll54 hr
Aug 22, 2:51 AM CDTAreal Flood AdvisoryEAXBates, Henry4 hr
Aug 22, 3:53 AM CDTRiver Flood WarningEAXJohnson, Pettis3 days
Aug 22, 3:53 AM CDTRiver Flood WarningEAXPlatte49 hr
Aug 22, 3:53 AM CDTRiver Flood WarningEAXPlatte55 hr
Aug 22, 5:20 AM CDTRiver Flood WarningEAXJackson30 hr
Aug 22, 5:20 AM CDTRiver Flood WarningEAXJackson28 hr
Aug 22, 5:20 AM CDTRiver Flood WarningEAXJackson29 hr
Aug 22, 5:41 AM CDTRiver Flood WarningEAXCooper39 hr
Aug 22, 5:57 AM CDTRiver Flood WarningEAXClay, Jackson, Ray70 hr
Aug 22, 5:57 AM CDTRiver Flood WarningEAXJackson, Lafayette, Ray3 days
Aug 22, 9:33 AM CDTRiver Flood WarningEAXCarroll, Chariton, Saline4 days
Aug 22, 9:33 AM CDTRiver Flood WarningEAXChariton, Howard, Saline3 days
Aug 22, 9:33 AM CDTRiver Flood WarningEAXCooper, Howard4 days
Aug 22, 4:09 PM CDTRiver Flood WarningEAXCooper34 hr

Nearby

Flash Flood Warnings in Kansas, 2017Flash Flood Warnings in Missouri, 2017Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.