Alert archive / Kansas / Flash Flood Warnings in 2015

Flash Flood Warning 64, NWS Kansas City, MO

July 20, 2015Johnson County, Miami County, Kansas; Cass County, Jackson County, Missouri

NWS Kansas City, MO issued this flash flood warning at Jul 20, 2015, 5:00 AM CDT for Johnson County, Miami County, Kansas; Cass County, Jackson County, Missouri. It was in force for 6 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: Jul 20, 2015, 5:00 AM CDT (10:00 UTC)
Expired: Jul 20, 2015, 11:00 AM CDT
In force: 6 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Johnson County, KS, Miami County, KS, Cass County, MO, Jackson County, MO

The radar

The Pleasant Hill radar (KEAX), 46 km from the middle of the area, began a volume at 10:03 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
Jul 20, 5:30 AM CDT	FLASH FLOOD	2 Nnw Stanley, KS	WATER OVER ROADS AND IN HOMES
Jul 20, 8:07 AM CDT	HEAVY RAIN 4.05	1 W Olathe, KS	PRECIPITATION TOTAL THROUGH 810 AM.

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, 10.0 hours before the alert went out and 75 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: 1870 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1180 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 10.9

Open this sounding in Storm Lab

The text

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

561 
WGUS53 KEAX 201000
FFWEAX
KSC091-121-MOC037-095-201600-
/O.NEW.KEAX.FF.W.0064.150720T1000Z-150720T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
500 AM CDT MON JUL 20 2015

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JOHNSON COUNTY IN EAST CENTRAL KANSAS...
  NORTHERN MIAMI COUNTY IN EAST CENTRAL KANSAS...
  CASS COUNTY IN WEST CENTRAL MISSOURI...
  SOUTHERN JACKSON COUNTY IN WEST CENTRAL MISSOURI...

* UNTIL 1100 AM CDT MONDAY
    
* AT 459 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE 
  ALREADY FALLEN WITH 1 TO 2 INCHES ADDITIONAL RAINFALL ANTICIPATED 
  OVER THE NEXT COUPLE HOURS . FLASH FLOODING IS EXPECTED TO BEGIN 
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  OVERLAND PARK...OLATHE...LEE'S SUMMIT...LENEXA...LEAWOOD...
  GRANDVIEW...BELTON...RAYMORE...GARDNER...HARRISONVILLE...PLEASANT
  HILL...DE SOTO...PAOLA...SPRING HILL...GREENWOOD...PECULIAR...
  LOUISBURG...LAKE LOTAWANA...EDGERTON AND LAKE WINNEBAGO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

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

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 3898 9506 3897 9504 3900 9502 3898 9495
      3900 9492 3898 9492 3899 9490 3892 9491
      3891 9411 3871 9413 3859 9412 3859 9506

$$

LEIGHTON

1 follow-up statement

118 
WGUS73 KEAX 201502
FFSEAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1002 AM CDT MON JUL 20 2015

KSC091-121-MOC037-095-201509-
/O.CAN.KEAX.FF.W.0064.000000T0000Z-150720T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JOHNSON KS-MIAMI KS-CASS MO-JACKSON MO-
1002 AM CDT MON JUL 20 2015

...THE FLASH FLOOD WARNING FOR JOHNSON...NORTHERN MIAMI...CASS AND
SOUTHERN JACKSON COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED...MINOR FLOODING IS OCCURRING OVER PARTS OF 
THE AREA AND THE FLASH FLOOD WARNING HAS BEEN REPLACED BY AN AREAL 
FLOOD WARNING.

LAT...LON 3898 9506 3897 9504 3900 9502 3898 9495
      3900 9492 3898 9492 3899 9490 3892 9491
      3891 9411 3871 9413 3859 9412 3859 9506

$$

MELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 12:07 AM CDT	Special Weather Statement	EAX	Linn	38 min
Jul 20, 12:53 AM CDT	Areal Flood Advisory	EAX	Linn	3 hr
Jul 20, 3:21 AM CDT	Areal Flood Advisory	EAX	Leavenworth, Wyandotte	3 hr
Jul 20, 3:34 AM CDT	Flash Flood Warning	EAX	Atchison, Leavenworth	6 hr
Jul 20, 3:40 AM CDT	Special Weather Statement	EAX	Johnson, Leavenworth, Wyandotte	50 min
Jul 20, 3:50 AM CDT	Flash Flood Warning	EAX	Johnson, Leavenworth, Wyandotte	6 hr
Jul 20, 4:05 AM CDT	Flash Flood Warning	EAX	Doniphan	6 hr
Jul 20, 6:15 AM CDT	River Flood Warning	EAX	Johnson	26 hr
Jul 20, 9:44 AM CDT	Areal Flood Warning	EAX	Johnson, Leavenworth, Wyandotte	6 hr
Jul 19, 8:22 PM CDT	Areal Flood Warning	EAX	Chariton	18 hr
Jul 20, 5:41 AM CDT	Areal Flood Advisory	EAX	Andrew, Atchison, Holt, Nodaway	3 hr
Jul 20, 6:45 AM CDT	Areal Flood Advisory	EAX	Chariton, Cooper, Howard, Pettis, Saline	3 hr
Jul 20, 10:01 AM CDT	River Flood Warning	EAX	Clay, Jackson, Ray	60 hr
Jul 20, 10:01 AM CDT	River Flood Warning	EAX	Cooper	48 hr
Jul 20, 2:25 PM CDT	Areal Flood Warning	EAX	Chariton	3 hr

Nearby

Flash Flood Warnings in Kansas, 2015 Flash Flood Warnings in Missouri, 2015 Every flash flood warning in 2015

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.