Alert archive / Iowa / Flash Flood Warnings in 2000

Flash Flood Warning 25, NWS Des Moines, IA

July 10, 2000Black Hawk County, Grundy County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jul 10, 2000, 5:19 AM CDT for Black Hawk County, Grundy County, Iowa. It was in force for 15 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, 5:19 AM CDT (10:19 UTC)
Expired: Jul 10, 2000, 8:00 PM CDT
In force: 15 hr
Issued by: NWS Des Moines, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Black Hawk County, IA, Grundy County, IA

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 10.3 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-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: 2939 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1086 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 109 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 KDMX 101029
FFWDMX
IAC013-075-101300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
519 AM CDT MON JUL 10 2000

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GRUNDY COUNTY IN CENTRAL IOWA
  BLACK HAWK COUNTY IN NORTHEAST IOWA
  THIS INCLUDES THE CITY OF WATERLOO

* UNTIL 800 AM

* AT 515 AM...LAW ENFORCEMENT REPORTED FLASH FLOODING OVER NUMEROUS
  PORTIONS OF GRUNDY COUNTY AND STREET FLOODING OVER PORTIONS OF
  WATERLOO AND CEDAR FALLS IN BLACK HAWK COUNTY.

* SLOW MOVING AND TRAINING THUNDERSTORMS HAVE PRODUCED TWO TO FOUR
  INCHES OF RAIN OVER BLACK HAWK AND GRUNDY COUNTIES DURING THE PAST
  FOUR HOURS. WHILE THE HEAVY RAIN HAS MOVE SOUTH OF BLACK HAWK
  COUNTY...ADDITIONAL RISES IN WATER LEVELS MAY OCCUR FOR THE NEXT
  FEW HOURS. ADDITIONAL HEAVY RAINS WILL MOVE ACROSS GRUNDY COUNTY
  BETWEEN 530 AM AND 630 AM. SIGNIFICANT FLASH FLOODING WILL OCCUR
  IN GRUNDY COUNTY.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

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.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES...ESPECIALLY AT NIGHT.
DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER
COVERS THE ROADWAY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA...LIVING NEAR THE AFFECTED
WATERWAYS...YOU SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND
PROPERTY.

LAT...LON 4251 9300 4225 9298 4233 9211 4262 9213

JAW
NNNN

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 10:44 PM CDT	Flash Flood Warning	DMX	Emmet	18 hr
Jul 9, 11:05 PM CDT	Flash Flood Warning	DMX	Palo Alto	15 hr
Jul 9, 11:30 PM CDT	Flash Flood Warning	DMX	Kossuth	15 hr
Jul 9, 11:48 PM CDT	Flash Flood Warning	DMX	Humboldt	15 hr
Jul 10, 12:09 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Worth	36 min
Jul 10, 12:20 AM CDT	Severe Thunderstorm Warning	DMX	Franklin, Hardin	40 min
Jul 10, 12:29 AM CDT	Flash Flood Warning	DMX	Cerro Gordo, Worth	15 hr
Jul 10, 12:52 AM CDT	Severe Thunderstorm Warning	DMX	Butler	38 min
Jul 10, 12:57 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	48 min
Jul 10, 1:24 AM CDT	Severe Thunderstorm Warning	DMX	Grundy	51 min
Jul 10, 1:29 AM CDT	Flash Flood Warning	DMX	Black Hawk, Bremer, Butler, Franklin, Grundy, Hardin	15 hr
Jul 10, 1:44 AM CDT	Flash Flood Warning	DMX	Emmet, Humboldt, Kossuth, Palo Alto	15 hr
Jul 10, 1:46 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	29 min
Jul 10, 4:47 AM CDT	Flash Flood Warning	DMX	Humboldt, Kossuth	15 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.