Alert archive / Missouri / Flash Flood Warnings in 2003

Flash Flood Warning 14, NWS Kansas City, MO

July 17, 2003Pettis County, Saline County, Missouri

NWS Kansas City, MO issued this flash flood warning at Jul 17, 2003, 7:42 AM CDT for Pettis County, Saline County, Missouri. It was in force for 6 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: Jul 17, 2003, 7:42 AM CDT (12:42 UTC)
Expired: Jul 17, 2003, 1:45 PM CDT
In force: 6 hr
Issued by: NWS Kansas City, MO
Area: Counties, with a storm outline in the text

Counties Pettis County, MO, Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 95 km from the middle of the area, began a volume at 12:46 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

Topeka, KS (KTOP), launched 12:00Z, 0.7 hours before the alert went out and 212 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: 73 J/kg
Mixed-layer CIN: -433 J/kg
Mixed-layer LCL: 2650 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KEAX 171243
FFWEAX
MOC159-195-171845-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
742 AM CDT THU JUL 17 2003

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PETTIS COUNTY IN CENTRAL MISSOURI
  SALINE COUNTY IN CENTRAL MISSOURI

* UNTIL 145 PM CDT

* AT 741 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.

* SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
  WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH
  FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING
  INCLUDE...SEDALIA...MARSHALL...SWEET SPRINGS...NELSON...NAPTON...
  MALTA BEND...LONGWOOD...LA MONTE...HUGHESVILLE...HOUSTONIA...GREEN
  RIDGE AND DRESDEN.

DOPPLER RADAR ESTIMATED RAINFALL IN EXCESS OF FOUR INCHES HAS FALLEN 
ACROSS SALINE AND NORTHERN PETTIS COUNTIES.  RUNOFF FROM THIS 
EXCESSIVE RAINFALL WILL LEAD TO RAPID RISES...AND THE THREAT OF 
FLASH FLOODING...ON AREA STREAMS AND CREEKS.

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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
PLEASANT HILL.

LAT...LON 3916 9295 3929 9326 3915 9350 3856 9350
          3857 9311 3894 9306

$$

SEAMAN

1 follow-up statement

000 
WGUS73 KEAX 171413
FFSEAX
MOC159-195-172015-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
911 AM CDT THU JUL 17 2003

...FLASH FLOOD WARNING CONTINUES UNTIL 145 PM CDT FOR PETTIS AND 
SALINE COUNTIES...

AT 906 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED 
AREA...MAINLY ACROSS SOUTHERN PETTIS COUNTY NEAR SEDALIA. DOPPLER 
RADAR ESTIMATED THAT ANYWHERE FROM TWO TO FOUR INCHES OF RAIN HAS 
FALLEN THIS MORNING...FROM THE MARSHALL AREA SOUTH TO SEDALIA.

REPORTS FROM SALINE COUNTY INDICATE THAT HIGHWAY 65 NEAR MALTA BEND 
WAS FLOODED.  NUMEROUS LOW WATER CROSSINGS ARE REPORTED OVERTOPPED 
BY WATER ACROSS PETTIS COUNTY.  

DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE 
ROUTES. IT ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY 
VEHICLES AWAY.

LAT...LON 3934 9316 3922 9341 3891 9348 3862 9348
          3859 9312 3891 9312 3923 9298

$$

HUDSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 6:04 AM CDT	Flash Flood Warning	EAX	Livingston	6 hr
Jul 17, 6:57 AM CDT	Severe Thunderstorm Warning	EAX	Pettis	63 min
Jul 17, 7:38 AM CDT	Flash Flood Warning	EAX	Macon	6 hr

Nearby

Flash Flood Warnings in Missouri, 2003 Every flash flood warning in 2003

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.