Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 19, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 12, 1993, 5:34 PM CDT for Buena Vista County, Clay County, Sac County, Iowa. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1993, 5:34 PM CDT (22:34 UTC)
- Expired
- Jun 12, 1993, 8:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Buena Vista County, IA, Clay County, IA, Sac County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.6 hours before the alert went out and 187 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
- 116 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 949 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 67 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 122236 FFWDSM IAC021-161-041-130130- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 534 PM CDT SAT JUN 12 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWEST IOWA ...BUENA-VISTA AND CLAY COUNTIES IN WEST CENTRAL IOWA ...SAC COUNTY AT 527 PM...DES MOINES RADAR CONTINUES TO SHOW STRONG THUNDERSTORMS MOVING ACROSS BUENA VISTA AND SAC COUNTIES. RAINFALL REPORTS RECEIVED DURING THE PAST HOUR RANGE FROM 3 TO 6 INCHES ACROSS PARTS OF BUENA VISTA COUNTY. THUNDERSTORMS ARE CONTINUING TO DEVELOP OVER SOUTHERN SAC INTO SOUTHERN BUENA VISTA COUNTIES. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 25 MPH AND WILL CONTINUE TO MOVE OVER AREAS THAT HAVE ALREADY RECEIVED EXCESSIVE RAINS DURING THE PAST HOUR. SOME OF THE TOWNS AND COMMUNITIES THAT WILL BE AFFECTED INCLUDE STORM LAKE...SAC CITY...SPENCER. 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. MOVE TO HIGHER G<ROUND. SMITH
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, Jun 12, 4:39 PM CDT, 55 minutes before
IAZALL-122240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 440 PM CDT SAT JUN 12 1993 AT 427 PM CDT...A SMALL CLUSTER OF STRONG THUNDERSTORMS WERE OVER NORTHWEST IOWA...50 MILES NORTHEAST OF SIOUX CITY BETWEEN CHEROKEE AND STORM LAKE. THESE STORMS WERE PRODUCING VERY HEAVY RAIN...WIND GUSTS UP TO 50 MILES AN HOUR AND PEA TO MARBLE SIZE HAIL. THESE STRONG STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS OVER THE NORTHWEST THIRD OF IOWA. THE RAIN WAS NORTHWEST OF A LINE THAT EXTENDED FROM JUST NORTH OF COUNCIL BLUFFS TO THE MINNESOTA BORDER...50 MILES NORTHWEST OF MASON CITY. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. FILLBACH
Special weather statement, Jun 12, 4:40 PM CDT, 54 minutes before
IAZALL-122240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 440 PM CDT SAT JUN 12 1993 AT 427 PM CDT...A SMALL CLUSTER OF STRONG THUNDERSTORMS WERE OVER NORTHWEST IOWA...50 MILES NORTHEAST OF SIOUX CITY BETWEEN CHEROKEE AND STORM LAKE. THESE STORMS WERE PRODUCING VERY HEAVY RAIN...WIND GUSTS UP TO 50 MILES AN HOUR AND PEA TO MARBLE SIZE HAIL. THESE STRONG STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS OVER THE NORTHWEST THIRD OF IOWA. THE RAIN WAS NORTHWEST OF A LINE THAT EXTENDED FROM JUST NORTH OF COUNCIL BLUFFS TO THE MINNESOTA BORDER...50 MILES NORTHWEST OF MASON CITY. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. FILLBACH
Local storm report, Jun 12, 5:18 PM CDT, 16 minutes before
LOCAL STORM REPORT...PRELIMINARY
NATIONAL WEATHER SERVICE DES MOINES IA
518 PM CDT SAT JUN 12 1993
TIME EVENT LOCATION -CITY AND COUNTY
...EVENT OCCURRED ON JUN 12 1993...
430 PM CDT GOLFBALL SIZE HAIL 30 SW 3SE OR 8 SW REMBRANDT
IN N BUENA VISTA COUNTY
...FOLLOWED BY TORRENTIAL RAIN...
BURKELocal storm report, Jun 12, 5:18 PM CDT, 16 minutes before
LOCAL STORM REPORT...PRELIMINARY
NATIONAL WEATHER SERVICE DES MOINES IA
518 PM CDT SAT JUN 12 1993
TIME EVENT LOCATION -CITY AND COUNTY
...EVENT OCCURRED ON JUN 12 199"3...
430 PM CDT GOLFBALL SIZE HAIL 30 SW 3SE OR 8 SW REMBRANDT
IN N BUENA VISTA COUNTY
...FOLLOWED BY TORRENTIAL RAIN...
BURKESpecial weather statement, Jun 12, 5:24 PM CDT, 10 minutes before
IAC021-041-122330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 524 PM CDT SAT JUN 12 1993 ...TORRENTIAL RAINFALL CONTINUES ACROSS PARTS OF NORTHWEST IOWA LATE THIS AFTERNOON... AT 522 PM CDT...DES MOINES RADAR CONTINUED TO SHOW STRONG THUNDERSTORMS OVER NORTHWEST IOWA. THE STRONGEST STORMS WERE CONTINUING OVER BUENA VIS AND CLAY COUNTIES. UNOFFICIAL RAINFALL REPORTS RECEIVED AS OF 5PM INCLUDE: 5 INCHES OF RAIN IN ABOUT AN HOUR AND A HALF 7 MILES NORTH OF ALTA IN WESTERN BUENA VISTA COUNTY. 2.6 INCHES RECORDED AT PETERSON...IN EXTREME SOUTHWEST CLAY COUNTY. 2.34 INCHES IN A 45 MINUTE PERIOD 5 MILES WEST OF THE TOWN OF REMBRANDT IN NORTH CENTRAL BUENA VISTA COUNTY. THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS BUENA VISTA AND CLAY COUNTIES DURING THE NEXT HOUR WITH ADDITIONAL HEAVY RAINFALL POSSIBLE. IF YOU LIVE NEAR A FLOOD PRONE AREA...BE PREPARED TO MOVE TO SAFETY IF FLOODING IS OBSERVED IN YOUR AREA. SMITH
Special weather statement, Jun 12, 5:25 PM CDT, 9 minutes before
IAC021-041-122330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 524 PM CDT SAT JUN 12 1993 ...TORRENTIAL RAINFALL CONTINUES ACROSS PARTS OF NORTHWEST IOWA LATE THIS AFTERNOON... AT 522 PM CDT...DES MOINES RADAR CONTINUED TO SHOW STRONG THUNDERSTORMS OVER NORTHWEST IOWA. THE STRONGEST STORMS WERE CONTINUING OVER BUENA VIS AND CLAY COUNTIES. UNOFFICIAL RAINFALL REPORTS RECEIVED AS OF 5PM INCLUDE: 5 INCHES OF RAIN IN ABOUT AN HOUR AND A HALF 7 MILES NORTH OF ALTA IN WESTERN BUENA VISTA COUNTY. 2.6 INCHES RECORDED AT PETERSON...IN EXTREME SOUTHWEST CLAY COUNTY. 2.34 INCHES IN A 45 MINUTE PERIOD 5 MILES WEST OF THE TOWN OF REMBRANDT IN NORTH CENTRAL BUENA VISTA COUNTY. THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS BUENA VISTA AND CLAY COUNTIES DURING THE NEXT HOUR WITH ADDITIONAL HEAVY RAINFALL POSSIBLE. IF YOU LIVE NEAR A FLOOD PRONE AREA...BE PREPARED TO MOVE TO SAFETY IF FLOODING IS OBSERVED IN YOUR .AREA. SMITH
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 4:00 PM CDT | Severe Thunderstorm Warning | DMX | Buena Vista | 45 min |
| Jun 12, 5:47 PM CDT | Flash Flood Warning | DMX | Emmet, Kossuth, Palo Alto, Pocahontas | 4 hr |
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.