Alert archive / Missouri / Flash Flood Warnings in 2012

Flash Flood Warning 3, NWS Kansas City, MO

May 4, 2012Gentry County, Nodaway County, Worth County, Missouri

NWS Kansas City, MO issued this flash flood warning at May 4, 2012, 3:12 AM CDT for Gentry County, Nodaway County, Worth 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: May 4, 2012, 3:12 AM CDT (08:12 UTC)
Expired: May 4, 2012, 8:48 AM CDT
In force: 6 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Gentry County, MO, Nodaway County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 173 km from the middle of the area, began a volume at 08:16 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
May 4, 3:40 AM CDT	FLASH FLOOD	Maryville, MO	SEVERAL CREEKS OUT OF THEIR BANKS. NUMEROUS ROADS IMPASSIBLE DUE TO HIGH WATER.

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

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 8.2 hours before the alert went out and 162 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: 3511 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 14.3

Open this sounding in Storm Lab

The text

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

802 
WGUS53 KEAX 040812
FFWEAX
MOC075-147-227-041400-
/O.NEW.KEAX.FF.W.0003.120504T0812Z-120504T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
312 AM CDT FRI MAY 4 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL NODAWAY COUNTY IN NORTHWEST MISSOURI...
  NORTHERN GENTRY COUNTY IN NORTHWEST MISSOURI...
  WORTH COUNTY IN NORTHWEST MISSOURI...

* UNTIL 900 AM CDT

* AT 308 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. RADAR ESTIMATES RAINFALL OF UP TO THREE INCHES HAS    
  FALLEN IN CENTRAL NODAWAY COUNTY SINCE MIDNIGHT WITH AN ADDITIONAL 
  ONE TO TWO INCHES OF RAIN INTO WORTH AND NORTHERN GENTRY COUNTIES  
  EARLY THIS MORNING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ALBANY...MARYVILLE...BURLINGTON JUNCTION...GRANT CITY...RAVENWOOD
  AND SKIDMORE.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

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 4023 9422 4022 9507 4024 9506 4024 9507
      4026 9507 4026 9510 4052 9516 4056 9424

$$

MJM

1 follow-up statement

074 
WGUS73 KEAX 041348
FFSEAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
848 AM CDT FRI MAY 4 2012

MOC075-147-227-041403-
/O.CAN.KEAX.FF.W.0003.000000T0000Z-120504T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GENTRY MO-NODAWAY MO-WORTH MO-
848 AM CDT FRI MAY 4 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WORTH...CENTRAL
NODAWAY AND NORTHERN GENTRY COUNTIES IS CANCELLED...

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 4023 9422 4022 9507 4024 9506 4024 9507
      4026 9507 4026 9510 4052 9516 4056 9424

$$

CDB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 12:08 AM CDT	Special Weather Statement	EAX	Andrew	37 min
May 4, 12:12 AM CDT	Special Weather Statement	EAX	Daviess	48 min
May 4, 12:18 AM CDT	Severe Thunderstorm Warning	EAX	Daviess, Grundy, Livingston	42 min
May 4, 12:29 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Daviess, DeKalb, Gentry, Harrison, Nodaway	46 min
May 4, 12:42 AM CDT	Areal Flood Advisory	EAX	Andrew, Daviess, DeKalb, Gentry, Grundy, Harrison and 1 more	6 hr
May 4, 1:28 AM CDT	Flash Flood Warning	EAX	Daviess, DeKalb, Gentry	6 hr
May 4, 1:31 AM CDT	Special Weather Statement	EAX	Grundy, Sullivan	44 min
May 4, 2:31 AM CDT	Special Weather Statement	EAX	Nodaway	44 min
May 4, 3:20 AM CDT	Special Weather Statement	EAX	Nodaway	40 min
May 4, 3:50 AM CDT	Special Weather Statement	EAX	Harrison	40 min
May 4, 3:55 AM CDT	Severe Thunderstorm Warning	EAX	Harrison	14 min
May 4, 4:08 AM CDT	Areal Flood Advisory	EAX	Harrison	6 hr
May 4, 5:07 AM CDT	River Flood Warning	EAX	Daviess, Gentry	26 hr
May 4, 6:25 AM CDT	Special Weather Statement	EAX	Lafayette	35 min
May 4, 7:05 AM CDT	River Flood Warning	EAX	Andrew, Nodaway	5 hr
May 4, 7:28 AM CDT	River Flood Warning	EAX	Daviess, Livingston	22 hr
May 4, 10:06 AM CDT	River Flood Warning	EAX	Linn, Livingston	31 hr
May 4, 10:06 AM CDT	River Flood Warning	EAX	Carroll, Chariton, Linn, Livingston	52 hr
May 4, 3:01 PM CDT	River Flood Warning	EAX	Buchanan	26 hr
May 4, 3:01 PM CDT	River Flood Warning	EAX	Platte	37 hr

Nearby

Flash Flood Warnings in Missouri, 2012 Every flash flood warning in 2012

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.