Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 45, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jul 4, 1993, 11:27 PM CDT for Decatur County, Iowa. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 4, 1993, 11:27 PM CDT (04:27 UTC)
- Expired
- Jul 5, 1993, 2:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Decatur County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 4.5 hours before the alert went out and 226 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
- 98 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1738 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 050428 FFWDSM IAC053-050730- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1127 PM CDT SUN JUL 4 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 230 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)... IN SOUTH CENTRAL IOWA ...SOUTHERN DECATUR COUNTY AT 1120 PM CDT THE GRAND RIVER STAGE AT DAVIS CITY WAS 9.6 FEET. FLOOD S GIS 9 FEET. AT 9.5 FEET THE RIVER CAUSES FLOODING SOUTH OF CITY OF GRAND RIVER AND EAST OF HIGHWAY 294. PARTS OF THE GRAVEL ROAD FROM SHEWMAKER PARK TO OAKHILL CEMETARY ARE WATER COVERED. ALSO SOME FLOODING OCCURS AT DAVIS CITY PARK. THE RIVER WAS RISING RAPIDLY AND RAINS CONTINUED OVER THE BASIN. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID CAMPING ALONG ST$REAMS OR CREEKS DURING THREATENING RAINS. FORSTER
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 4, 9:45 PM CDT, 1 hour 42 minutes before
IAZALL-050340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 942 PM CDT SUN JUL 4 1993 ...A TORNADO WATCH REMAINS IN EFFECT FOR A PORTION OF SOUTHWEST AND SOUTH CENTRAL IOWA UNTIL 1 AM MONDAY MORNING... AT 925 PM CDT...A NARROW BAND OF STRONG THUNDERSTORMS WERE OVER SOUTHWEST INTO SOUTH CENTRAL IOWA. THE BAND WAS 10 MILES WIDE AND EXTENDED FROM 40 MILES SOUTH OF COUNCIL BLUFFS...NEAR HAMBURG TO 20 MILES NORTH OF LAMONI. THE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS WHICH WAS SOUTH OF A LINE THAT EXTENDED FROM 25 MILES SOUTH OF COUNCIL BLUFFS TO 15 MILES SOUTH OF DES MOINES TO NEAR DUBUQUE. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AROUND 30 MILES AN HOUR. FILLBACH
Special weather statement, Jul 4, 10:35 PM CDT, 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1035 PM CDT SUN JUL 4 1993 THE TORNADO WATCH NUMBER 953 FOR A PORTION OF SOUTHWEST AND SOUTH CENTRAL IOWA HAS BEEN CANCELLED AND REPLACED BY A SEVERE THUNDER STORM WATCH NUMBER 594 EFFECTIVE UNTIL 5 AM CDT MONDAY JULY 5TH THAT COVERS PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA. FORSTER
Special weather statement, Jul 4, 10:35 PM CDT, 52 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE DES MOINES IA 1035 PM CDT SUN JUL 4 1993 THE TORNADO WATCH NUMBER 593 FOR A PORTION OF SOUTHWEST AND SOUTH CENTRAL IOWA HAS BEEN CANCELLED AND REPLACED BY A SEVERE THUNDER STORM WATCH NUMBER 594 EFFECTIVE UNTIL 5 AM CDT MONDAY JULY 5TH THAT COVERS PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA. FORSTER
Special weather statement, Jul 4, 10:37 PM CDT, 50 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE DES MOINES IA 1035 PM CDT SUN JUL 4 1993 THE TORNADO WATCH NUMBER 593 FOR A PORTION OF SOUTHWEST AND SOUTH CENTRAL IOWA HAS BEEN CANCELLED AND REPLACED BY A SEVERE THUNDER STORM WATCH NUMBER 594 EFFECTIVE UNTIL 5 AM CDT MONDAY JULY 5TH THAT COVERS PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA. FORSTER
Special weather statement, Jul 4, 10:40 PM CDT, 47 minutes before
IAZALL-050440- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1040 PM CDT SUN JUL 4 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA UNTIL 5 AM MONDAY... AT 1028 PM CDT...A NARROW BAND OF STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST INTO SOUTH CENTRAL IOWA. THE BAND WAS 20 MILES WIDE AND EXTENDED FROM 40 MILES SOUTHEAST OF COUNCIL BLUFFS...NEAR VILLISCA TO 35 MILES SOUTHEAST OF DES MOINES...NEAR CHARITON. THE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS WHICH WAS SOUTH OF A LINE THAT EXTENDED FROM NEAR COUNCIL BLUFFS TO DES MOINES TO NEAR DUBUQUE. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AROUND 30 MILES AN HOUR. FILLBACH ~~. . gf6WWUS $1 8018475/1214/q6WWUS| ldbWWIN t M110 OVPI`WWUSd @CU A60327/ HN 4hx WUUSt C`WWUS h\7WWUSh ,C6WWUS T6WWUSB XWOUS0 S6WWUSx DfWWUSD H6WWUSH
Special weather statement, Jul 4, 10:41 PM CDT, 46 minutes before
IAZALL-050440- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1040 PM CDT SUN JUL 4 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA UNTIL 5 AM MONDAY... AT 1028 PM CDT...A NARROW BAND OF STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST INTO SOUTH CENTRAL IOWA. THE BAND WAS 20 MILES WIDE AND EXTENDED FROM 40 MILES SOUTHEAST OF COUNCIL BLUFFS...NEAR VILLISCA TO 35 MILES SOUTHEAST OF DES MOINES...NEAR CHARITON. THE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS WHICH WAS SOUTH OF A LINE THAT EXTENDED FROM NEAR COUNCIL BLUFFS TO DES MOINES TO NEAR DUBUQUE. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AROUND 30 MILES AN HOUR. FILLBACH
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 12:54 AM CDT | Flash Flood Warning | DMX | Clarke, Decatur, Lucas, Ringgold, Union | 5 hr |
| Jul 5, 12:54 AM CDT | Flash Flood Warning | DMX | Mahaska, Marion | 5 hr |
| Jul 5, 2:46 AM CDT | Flash Flood Warning | DMX | Iowa, Keokuk, Poweshiek | 4 hr |
| Jul 5, 3:19 AM CDT | Flash Flood Warning | DMX | Benton, Johnson, Linn | 4 hr |
| Jul 5, 1:19 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 26 min |
| Jul 5, 1:37 PM CDT | Severe Thunderstorm Warning | DMX | Adams | 11 min |
| Jul 5, 2:09 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 36 min |
| Jul 5, 2:33 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Lucas, Wayne | 27 min |
| Jul 5, 2:33 PM CDT | Severe Thunderstorm Warning | DMX | Monroe | 20 min |
Nearby
Flash Flood Warnings in Iowa, 1993Every flash flood warning in 1993
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.