Alert archive / Kansas / Flash Flood Warnings in 2016

Flash Flood Warning 46, NWS Kansas City, MO

September 9, 2016Johnson County, Miami County, Kansas

NWS Kansas City, MO issued this flash flood warning at Sep 9, 2016, 10:12 PM CDT for Johnson County, Miami County, Kansas. It was in force for 3 hr. 2 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 9, 2016, 10:12 PM CDT (03:12 UTC)
Expired: Sep 10, 2016, 1:15 AM CDT
In force: 3 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Johnson County, KS, Miami County, KS

The radar

The Pleasant Hill radar (KEAX), 60 km from the middle of the area, began a volume at 03:13 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

Time	Report	Where	Remark
Sep 9, 10:15 PM CDT	HEAVY RAIN 2.75	1 N Gardner, KS	SINCE 830 PM NEXT TO THE JOHNSON COUNTY FAIRGROUNDS.
Sep 9, 11:40 PM CDT	FLASH FLOOD	4 Wnw Spring Hill, KS	WATER RESCUE NEAR 203RD AND CEDAR NILES RD. REPORTED VIA SOCIAL MEDIA.

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, 3.2 hours before the alert went out and 63 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: 1542 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1083 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

084 
WGUS53 KEAX 100312
FFWEAX
KSC091-121-100615-
/O.NEW.KEAX.FF.W.0046.160910T0312Z-160910T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1012 PM CDT FRI SEP 9 2016

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN JOHNSON COUNTY IN EAST CENTRAL KANSAS...
  NORTHWESTERN MIAMI COUNTY IN EAST CENTRAL KANSAS...

* UNTIL 115 AM CDT

* AT 1011 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA AS WELL
  AS FLOODING IN THE CITY OF OLATHE . UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS OCCURRING OR EXPECTED TO BEGIN
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  OLATHE...LENEXA...GARDNER...DE SOTO...SPRING HILL...EDGERTON...
  CLEARVIEW CITY...CLARE AND LACKMANS.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE
WARNED AREA.

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 3873 9506 3897 9502 3895 9473 3868 9482
      3868 9506

$$

MELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 7:03 PM CDT	Special Weather Statement	EAX	Atchison, Doniphan	42 min
Sep 9, 8:25 PM CDT	Special Weather Statement	EAX	Linn	35 min
Sep 9, 8:55 PM CDT	Special Weather Statement	EAX	Linn	35 min
Sep 9, 9:05 PM CDT	Severe Thunderstorm Warning	EAX	Linn, Miami	40 min
Sep 9, 9:16 PM CDT	Special Weather Statement	EAX	Wyandotte	29 min
Sep 9, 9:37 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Wyandotte	53 min
Sep 9, 9:41 PM CDT	Areal Flood Advisory	EAX	Johnson, Linn, Miami	6 hr
Sep 9, 10:05 PM CDT	Areal Flood Advisory	EAX	Johnson	6 hr
Sep 9, 10:09 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	36 min
Sep 10, 12:43 AM CDT	Areal Flood Warning	EAX	Johnson, Linn, Miami	12 hr
Sep 10, 5:00 AM CDT	River Flood Warning	EAX	Linn	4 days
Sep 10, 5:00 AM CDT	River Flood Warning	EAX	Linn	55 hr
Sep 10, 12:45 PM CDT	Areal Flood Warning	EAX	Miami	3 hr

Nearby

Flash Flood Warnings in Kansas, 2016 Every 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.