Alert archive / Iowa / Flash Flood Warnings in 1996
Flash Flood Warning 6, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jul 16, 1996, 10:48 PM CDT for Woodbury 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 16, 1996, 10:48 PM CDT (03:48 UTC)
- Expired
- Jul 17, 1996, 1:50 AM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Woodbury County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.8 hours before the alert went out and 122 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.
- Mixed-layer CAPE
- 1921 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 979 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 170349 FFWFSD IAC193-170650- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1048 PM CDT TUE JUL 16 1996 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS SD HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 150 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY... IN NORTHWEST IOWA ...WOODBURY COUNTY STRONG THUNDERSTORMS PRODUCING HEAVY RAIN CONTINUE TO MOVE ACROSS WOODBURY COUNTY. AT 1040 PM RUNNING WATER KNEE DEEP WAS REPORTED IN SOUTHEAST SIOUX CITY. DOPPLAR RADAR ESTIMATES 2 INCHES OF RAIN HAS FALLEN SINCE 930 PM IN SOUTH SIOUX CITY IOWA. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE TO ESCAPE ,FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. BLOOM &
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 16, 10:42 PM CDT, 6 minutes before
TTAA00 KFSD DDHHMM IAZ031-032-170600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1040 PM CDT TUE JUL 17 1996 ...TORNADO WATCH 790 REPLACED BY SEVERE THUNDERSTORM WATCH 791... THE TORNADO WATCH THAT WAS IN IN EFFECT UNTIL 1 AM FOR WOODBURY AND IDA COUNTIES IN IOWA HAS BEEN REPLACED BY A SEVERE THUNDERSTORM WATCH WHICH IS VALID UNTIL 4 AM CDT FOR MUCH OF SOUTHEAST SOUTH DAKOTA... NORTHEAST NEBRASKA...AND NORTHWEST IOWA. CHAPMAN
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 7:17 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 43 min |
| Jul 16, 8:02 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 48 min |
| Jul 16, 10:24 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 31 min |
| Jul 16, 10:56 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 34 min |
| Jul 16, 11:36 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 34 min |
| Jul 17, 1:28 AM CDT | Flash Flood Warning | FSD | Woodbury | 3 hr |
Nearby
Flash Flood Warnings in Iowa, 1996Every flash flood warning in 1996
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.