Alert archive / Missouri / Flash Flood Warnings in 2009

Flash Flood Warning 39, NWS Kansas City, MO

August 4, 2009Atchison County, Nodaway County, Missouri

NWS Kansas City, MO issued this flash flood warning at Aug 4, 2009, 4:10 AM CDT for Atchison County, Nodaway County, Missouri. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 4, 2009, 4:10 AM CDT (09:10 UTC)
Expired: Aug 4, 2009, 8:47 AM CDT
In force: 5 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Atchison County, MO, Nodaway County, MO

The radar

The Omaha radar (KOAX), 126 km from the middle of the area, began a volume at 09:12 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.2 hours before the alert went out and 126 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: 1039 J/kg
Mixed-layer CIN: -248 J/kg
Mixed-layer LCL: 1994 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KEAX 040910
FFWEAX
MOC005-147-041500-
/O.NEW.KEAX.FF.W.0039.090804T0910Z-090804T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
410 AM CDT TUE AUG 4 2009

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN ATCHISON COUNTY IN NORTHWEST MISSOURI...
  NORTHERN NODAWAY COUNTY IN NORTHWEST MISSOURI...

* UNTIL 1000 AM CDT

* AT 408 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.     
  DOPPLER WEATHER RADAR HAS ESTIMATED 2 TO 3 INCHES OF RAIN HAS      
  ALREADY FALLEN ACROSS THE WARNING AREA...WITH AN ADDITIONAL 2      
  INCHES POSSIBLE THROUGH 6 AM.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MARYVILLE...TARKIO...BURLINGTON JUNCTION...HOPKINS AND RAVENWOOD.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS... OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING
STREAM... EVEN A SMALL ONE...ON FOOT OR IN A VEHICLE.

&&

LAT...LON 4058 9464 4047 9464 4047 9462 4044 9462
      4029 9463 4046 9568 4049 9570 4056 9567
      4053 9568 4052 9569 4053 9575 4054 9577
      4059 9577

$$

21

1 follow-up statement

000 
WGUS73 KEAX 041347
FFSEAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
847 AM CDT TUE AUG 4 2009

MOC005-147-041400-
/O.CAN.KEAX.FF.W.0039.000000T0000Z-090804T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NODAWAY MO-ATCHISON MO-
847 AM CDT TUE AUG 4 2009

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN ATCHISON
AND NORTHERN NODAWAY 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF FLOODING WAS OBSERVED PLEASE RELAY YOUR REPORT TO LOCAL LAW
ENFORCEMENT OR TO THE NATIONAL WEATHER SERVICE IN PLEASANT HILL.

&&

LAT...LON 4058 9464 4047 9464 4047 9462 4044 9462
      4029 9463 4046 9568 4049 9570 4056 9567
      4053 9568 4052 9569 4053 9575 4054 9577
      4059 9577

$$

SF

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 1:22 AM CDT	Special Weather Statement	EAX	Nodaway	23 min
Aug 4, 1:44 AM CDT	Special Weather Statement	EAX	Nodaway	31 min
Aug 4, 1:52 AM CDT	Severe Thunderstorm Warning	EAX	Atchison, Nodaway	23 min
Aug 4, 2:10 AM CDT	Areal Flood Advisory	EAX	Atchison, Nodaway, Worth	4 hr
Aug 4, 2:15 AM CDT	Special Weather Statement	EAX	Nodaway	30 min
Aug 4, 2:46 AM CDT	Special Weather Statement	EAX	Gentry, Nodaway, Worth	29 min
Aug 4, 3:03 AM CDT	Severe Thunderstorm Warning	EAX	Gentry, Nodaway, Worth	27 min
Aug 4, 3:16 AM CDT	Special Weather Statement	EAX	Andrew, Holt	29 min
Aug 4, 3:17 AM CDT	Special Weather Statement	EAX	Atchison	28 min
Aug 4, 3:21 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Daviess, DeKalb, Gentry, Harrison	24 min
Aug 4, 3:55 AM CDT	Special Weather Statement	EAX	Caldwell, Daviess, DeKalb, Grundy, Mercer	35 min
Aug 4, 4:25 AM CDT	Severe Thunderstorm Warning	EAX	Chariton, Daviess, Grundy, Linn, Livingston, Mercer and 1 more	33 min
Aug 4, 4:37 AM CDT	Special Weather Statement	EAX	Mercer	38 min
Aug 4, 4:55 AM CDT	Areal Flood Advisory	EAX	Andrew, Daviess, DeKalb, Gentry, Holt, Nodaway	4 hr
Aug 4, 5:02 AM CDT	Special Weather Statement	EAX	Chariton, Howard, Macon, Randolph, Saline	43 min
Aug 4, 5:10 AM CDT	Special Weather Statement	EAX	Atchison	35 min
Aug 4, 5:28 AM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt, Nodaway	47 min
Aug 4, 5:33 AM CDT	Special Weather Statement	EAX	Putnam, Schuyler	42 min
Aug 4, 5:58 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Holt	47 min
Aug 4, 6:25 AM CDT	Severe Thunderstorm Warning	EAX	Buchanan, Platte	35 min
Aug 4, 6:44 AM CDT	Special Weather Statement	EAX	Platte	31 min
Aug 4, 6:51 AM CDT	Special Weather Statement	EAX	Jackson	24 min
Aug 4, 7:10 AM CDT	Special Weather Statement	EAX	Cass	50 min
Aug 4, 7:22 AM CDT	Special Weather Statement	EAX	Johnson	38 min
Aug 4, 7:30 AM CDT	Special Weather Statement	EAX	Bates, Henry	30 min
Aug 4, 7:40 AM CDT	Severe Thunderstorm Warning	EAX	Bates, Cass, Henry, Johnson	50 min
Aug 4, 8:02 AM CDT	Special Weather Statement	EAX	Pettis	43 min

Nearby

Flash Flood Warnings in Missouri, 2009 Every flash flood warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.