Alert archive / Iowa / Flash Flood Warnings in 2000

Flash Flood Warning 20, NWS La Crosse, WI

July 2, 2000Allamakee County, Iowa

NWS La Crosse, WI issued this flash flood warning at Jul 2, 2000, 5:08 PM CDT for Allamakee County, 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 counties it named.

The facts

Issued
Jul 2, 2000, 5:08 PM CDT (22:08 UTC)
Expired
Jul 2, 2000, 8:00 PM CDT
In force
3 hr
Issued by
NWS La Crosse, WI
Area
Whole counties

County Allamakee County, IA

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.1 hours before the alert went out and 199 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2000-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1145 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2000-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1145 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
890 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
25 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KARX 022210
FFWARX
IAC005-030100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
508 PM CDT SUN JUL 2 2000

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ALLAMAKEE COUNTY IN NORTHEAST IOWA

* UNTIL 800 PM CDT

* AT 508 PM 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...
  CHURCHTOWN
  LANSING
  WAUKON

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.

NELSON

LAT...LON G4351 9162 4312 9161 4308 9117 4351 9125

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 3:18 PM CDTSevere Thunderstorm WarningARXHoward, Mitchell57 min
Jul 2, 3:51 PM CDTSevere Thunderstorm WarningARXChickasaw54 min
Jul 2, 4:05 PM CDTTornado WarningARXAllamakee, Winneshiek55 min
Jul 2, 4:11 PM CDTSevere Thunderstorm WarningARXFloyd64 min
Jul 2, 4:45 PM CDTSevere Thunderstorm WarningARXChickasaw60 min
Jul 2, 5:00 PM CDTFlash Flood WarningARXChickasaw3 hr
Jul 2, 5:20 PM CDTSevere Thunderstorm WarningARXAllamakee55 min

Nearby

Flash Flood Warnings in Iowa, 2000Every 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.