Alert archive / Missouri / Flash Flood Warnings in 2012

Flash Flood Warning 2, NWS Kansas City, MO

May 4, 2012Daviess County, DeKalb County, Gentry County, Missouri

NWS Kansas City, MO issued this flash flood warning at May 4, 2012, 1:28 AM CDT for Daviess County, DeKalb County, Gentry 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, 1:28 AM CDT (06:28 UTC)
Expired: May 4, 2012, 7:19 AM CDT
In force: 6 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Daviess County, MO, DeKalb County, MO, Gentry County, MO

The radar

The Pleasant Hill radar (KEAX), 141 km from the middle of the area, began a volume at 06:31 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, 2:00 AM CDT	FLASH FLOOD	1 W Coffey, MO	HIGHWAY B CLOSED DUE TO RUSHING 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, 6.5 hours before the alert went out and 173 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.

163 
WGUS53 KEAX 040628
FFWEAX
MOC061-063-075-041230-
/O.NEW.KEAX.FF.W.0002.120504T0628Z-120504T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN DEKALB COUNTY IN NORTHWEST MISSOURI...
  NORTHERN DAVIESS COUNTY IN NORTH CENTRAL MISSOURI...
  SOUTHERN GENTRY COUNTY IN NORTHWEST MISSOURI...

* UNTIL 730 AM CDT

* AT 122 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. DOPPLER RADAR ESTIMATED THAT UP TO 4 INCHES OF RAIN   
  HAVE FALLEN SINCE 11 PM ACROSS NORTHERN DAVIESS AND SOUTHERN       
  GENTRY COUNTIES. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...     
  JAMESPORT...KING CITY AND PATTONSBURG. THIS RUNOFF IS LIKELY TO    
  CAUSE DOWNSTREAM FLOODING OF THE GRAND RIVER AFFECTING JAMESON AND 
  GALLATIN.  

THIS WILL IMPACT

 I-35 BETWEEN MILE MARKERS 71 AND 82.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE 
WARNED AREA THROUGH 3 AM.

&&

LAT...LON 4013 9377 3993 9376 4004 9460 4010 9461
      4014 9460

$$

HAWBLITZEL

1 follow-up statement

663 
WGUS73 KEAX 041219
FFSEAX

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

MOC061-063-075-041231-
/O.CAN.KEAX.FF.W.0002.000000T0000Z-120504T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIESS MO-DEKALB MO-GENTRY MO-
719 AM CDT FRI MAY 4 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN GENTRY...
NORTHEASTERN DEKALB AND NORTHERN DAVIESS COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM OVERNIGHT 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. HOWEVER...ADDITIONAL 
THUNDERSTORMS WERE SOUTH OF THE WARNED AREA AND MAY MOVE INTO 
SOUTHERN GENTRY...NORTHEASTERN DEKALB AND NORTHERN DAVIESS COUNTIES 
AND MAY CAUSE ADDITIONAL FLOODING PROBLEMS. THESE STORMS WILL BE 
MONITORED CLOSELY FOR ANY ADDITIONAL POSSIBLE WARNINGS.

IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW 
ENFORCEMENT AGENCY.

LAT...LON 4013 9377 3993 9376 4004 9460 4010 9461
      4014 9460

$$

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, 1:31 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, 3:12 AM CDT	Flash Flood Warning	EAX	Gentry, Nodaway, Worth	6 hr
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.