Alert archive / Iowa / Flash Flood Warnings in 2000

Flash Flood Warning 23, NWS La Crosse, WI

July 10, 20004 counties in Iowa

NWS La Crosse, WI issued this flash flood warning at Jul 10, 2000, 12:36 AM CDT for 4 counties in Iowa. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jul 10, 2000, 12:36 AM CDT (05:36 UTC)
Expired: Jul 10, 2000, 3:30 AM CDT
In force: 3 hr
Issued by: NWS La Crosse, WI
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Chickasaw County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.6 hours before the alert went out and 200 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: 3029 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KARX 100539
FFWARX
IAC037-067-089-131-100830-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1236 AM CDT MON JUL 10 2000

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FLOYD COUNTY IN NORTH CENTRAL IOWA
  MITCHELL COUNTY IN NORTH CENTRAL IOWA
  HOWARD COUNTY IN NORTHEAST IOWA
  CHICKASAW COUNTY IN NORTHEAST IOWA

* UNTIL 330 AM CDT

* AT 1236 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ACROSS MUCH OF THE WARNED
  AREA.

* SOME LOCATIONS WHICH MAY BE AFFECTED INCLUDE...
  RICEVILLE
  ELMA
  FLOYD
  CHARLES CITY
  NEW HAMPTON

DUE TO HEAVY RAINFALL FROM YESTERDAY...COUPLED ALONG WITH A
POTENTIAL FOR AN ADDITIONAL 1 TO 1 1/2 INCHES WITH THE APPROACHING
STORMS...FLASH FLOODING WILL BE LIKELY ACROSS PORTIONS OF THE WARNED
COUNTIES.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO FORGE
FLOODED ROADWAYS BY FOOT OR AUTOMOBILE. IF YOUR VEHICLE STALLS...
ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND.

RIECK

LAT...LON 4340 9226 4302 9225 4302 9277 4340 9278

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 12:06 AM CDT	Severe Thunderstorm Warning	ARX	Mitchell	69 min
Jul 10, 12:10 AM CDT	Severe Thunderstorm Warning	ARX	Floyd	65 min
Jul 10, 12:36 AM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Howard	54 min
Jul 10, 1:00 AM CDT	Flash Flood Warning	ARX	Winneshiek	3 hr
Jul 10, 1:03 AM CDT	Severe Thunderstorm Warning	ARX	Fayette, Winneshiek	42 min
Jul 10, 1:33 AM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Clayton	57 min
Jul 10, 1:38 AM CDT	Flash Flood Warning	ARX	Allamakee, Clayton, Fayette	3 hr

Nearby

Flash Flood Warnings in Iowa, 2000 Every flash flood warning in 2000

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.