Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 37, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 29, 1993, 5:46 PM CDT for Clay County, Dickinson County, Iowa. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1993, 5:46 PM CDT (22:46 UTC)
- Expired
- Jun 29, 1993, 6:45 PM CDT
- In force
- 59 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Clay County, IA, Dickinson County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 10.8 hours before the alert went out and 219 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 938 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 292247 FFWDSM IAC041-059-292345- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 546 PM CDT TUE JUN 29 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)S... IN NORTHWEST IOWA ...CLAY COUNTY...DICKINSON COUNTY A SEVERE THUNDERSTORM HAS BEEN REPORTED IN THE SPIRIT LAKE AREA OF NORTHWEST IOWA. THE STORM IS MOVING TO THE EAST AT 35 MPH AND WILL AFFECT SPENCER BEFORE 6 PM CDT. ALREADY NUMEROUS REPORTS OF LARGE HAIL...AND DAMAGING WINDS HAVE OCCURED IN AND AROUND SPENCER SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. LEWIS &
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 29, 5:00 PM CDT, 46 minutes before
IAZ006>011-016>019-026>029-038>040-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 505 PM CDT TUE JUN 29 1993 ...THUNDERSTORMS ARE MOVING ACROSS THE I35 CORRIDOR... AT 500 PM CDT...THUNDERSTORMS SOME PRODUCING VERY HEAVY RAIN ...HAIL...GUSTY WINDS AND FREQUENT LIGHTNING WERE MOVING OVER NORTH CENTRAL IOWA. THIS CLUSTER OF THUNDERSTORMS WAS LOCATED ABOUT 20 MILES SOUTH OF MASON CITY...JUST WEST OF SHEFFIELD AND SOUTH OF THORNTON. THE STORMS ARE MOVING NORTHEAST AT 30 MILES AN HOUR AND WILL AFFECT SHEFFIELD...HAMPTON...THORNTON...AND THE MASON CITY AREA BY 515PM TO 600 PM CDT. THESE THUNDERSTORMS ARE BEING MONITORED CLOSELY BY THE NATIONAL WEATHER SERVICE AND UPD2ATES ON THESE STORMS WILL BE ISSUED AS THEY MOVE THROUGH NORTH CENTRAL INTO NORTHEAST IOWA. PEOPLE SHOULD BE ALERT FOR THESE THUNDERSTORMS AND BE PREPARED TO TAKE QUICK ACTION IF THE STORMS BECOME INTENSE.
Special weather statement, Jun 29, 5:05 PM CDT, 41 minutes before
IAZ006>011-016>019-026>029-038>040-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 505 PM CDT TUE JUN 29 1993 ...THUNDERSTORMS ARE MOVING ACROSS THE I35 CORRIDOR... AT 500 PM CDT...THUNDERSTORMS SOME PRODUCING VERY HEAVY RAIN ...HAIL...GUSTY WINDS AND FREQUENT LIGHTNING WERE MOVING OVER NORTH CENTRAL IOWA. THIS CLUSTER OF THUNDERSTORMS WAS LOCATED ABOUT 20 MILES SOUTH OF MASON CITY...JUST WEST OF SHEFFIELD AND SOUTH OF THORNTON. THE STORMS ARE MOVING NORTHEAST AT 30 MILES AN HOUR AND WILL AFFECT SHEFFIELD...HAMPTON...THORNTON...AND THE MASON CITY AREA BY 515PM TO 600 PM CDT. THESE THUNDERSTORMS ARE BEING MONITORED CLOSELY BY THE NATIONAL WEATHER SERVICE AND UPDATES ON THESE STORMS WILL BE ISSUED AS THEY MOVE THROUGH NORTH CENTRAL INTO NORTHEAST IOWA. PEOPLE SHOULD BE ALERT FOR THESE THUNDERSTORMS AND BE PREPARED TO TAKE QUICK ACTION IF THE STORMS BECOME INTENSE.
Special weather statement, Jun 29, 5:30 PM CDT, 16 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-292330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 530 PM CDT TUE JUN 29 1993 ...STRONG THUNDERSTORMS WORKING THEIR WAY THROUGH NORTH CENTRAL IOWA... AT 525 PM RADAR WAS SHOWING A CLUSTER OF STRONG THUNDERSTORMS 15 MILES SOUTH OF MASON CITY NEAR SHEFFIELD. THESE STORMS WERE MOVING NORTHEAST AT 30 MPH AND SHOULD PRODUCE HEAVY RAINS...SMALL HAIL AND GUSTY WINDS 30 TO 40 MPH. SOME CITIES TO BE AFFECTED BY THESE STORMS THROUGH 6 PM ARE SHEFFIELD...ROCKWELL...DOUGHERTY...AREDALE AND DUMONT. A TORNADO WATCH IS IN EFFECT FOR ALL OF NORTHEAST AND NORTH CENTRAL IOWA UNTIL 11 PM SO ALL CITIZENS ARE ADVISED TO STAY TUNED FOR LATER STATEMENTS AND INFORMATION BY LISTENING TO NOAA WEATHER RADIO...TV OR COMMERCIAL RADIO. BY ALL MEANS MOVE TO A PLACE OF SHELTER SHOULD THREATENING WEATHER APPROACH. COLLAR
Special weather statement, Jun 29, 5:31 PM CDT, 15 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-292330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 530 PM CDT TUE JUN 29 1993 ...STRONG THUNDERSTORMS WORKING THEIR WAY THROUGH NORTH CENTRAL IOWA... AT 525 PM RADAR WAS SHOWING A CLUSTER OF STRONG THUNDERSTORMS 15 MILES SOUTH OF MASON CITY NEAR SHEFFIELD. THESE STORMS WERE MOVING NORTHEAST AT 30 MPH AND SHOULD PRODUCE HEAVY RAINS...SMALL HAIL AND GUSTY WINDS 30 TO 40 MPH. SOME CITIES TO BE AFFECTED BY THESE STORMS THROUGH 6 PM ARE SHEFFIELD...ROCKWELL...DOUGHERTY...AREDALE AND DUMONT. A TORNADO WATCH IS IN EFFECT FOR ALL OF NORTHEAST AND NORTH CENTRAL IOWA UNTIL 11 PM SO ALL CITIZENS ARE ADVISED TO STAY TUNED FOR LATER STATEMENTS AND INFORMATION BY LISTENING TO NOAA WEATHER RADIO...TV OR COMMERCIAL RADIO. BY ALL MEANS MOVE TO A PLACE OF SHELTER SHOULD THREATENING WEATHER APPROACH. COLLAR
Special weather statement, Jun 29, 5:40 PM CDT, 6 minutes before
IAZALL-292340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 540 PM CDT TUE JUN 29 1993 ...A TORNADO WATCH IS IN EFFECT FOR EXTREME NORTHWEST IOWA UNTIL 8 PM... ...A TORNADO WATCH IS IN EFFECT FOR NORTH CENTRAL AND NORTHEAST IOWA UNTIL 11 PM... ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHEAST IOWA TONIGHT... AT 530 PM CDT...ISOLATED INTENSE THUNDERSTORMS WERE LOCATED OVER NORTH CENTRAL AND NORTHWEST IOWA. THE STORMS WERE OCCURRING FROM 25 MILES NORTHWEST TO 35 MILES NORTHEAST OF SPENCER...AND 20 MILES SOUTH OF MASON CITY. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...HAIL...STRONG WINDS AND DANGEROUS LIGHTNING. THE STORMS WERE OCCURRING IN AN AREA OF SHOWERS AND STORMS OCCURRING NORTH OF A LINE FROM HAWARDEN TO NEAR WATERLOO. HAWARDEN IS 30 MILES NORTH OF SIOUX CITY. SCATTERED SHOWERS WERE ALSO OCCURRING IN A 25 MILE WIDE BAND EXTENDING FROM 15 MILES EAST OF FORT DODGE NEAR WEBSTER CITY...TO 40 MILES SOUTH OF OTTUMWA AT THE IOWA/MISSOURI BORDER. THE STORMS AND SHOWERS WERE MOVING EAST AT 30 MILES AN HOUR. JAK/BRF WWUS35KPUB ,0
Special weather statement, Jun 29, 5:42 PM CDT, 4 minutes before
IAZALL-292340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 540 PM CDT TUE JUN 29 1993 ...A TORNADO WATCH IS IN EFFECT FOR EXTREME NORTHWEST IOWA UNTIL 8 PM... ...A TORNADO WATCH IS IN EFFECT FOR NORTH CENTRAL AND NORTHEAST IOWA UNTIL 11 PM... ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHEAST IOWA TONIGHT... AT 530 PM CDT...ISOLATED INTENSE THUNDERSTORMS WERE LOCATED OVER NORTH CENTRAL AND NORTHWEST IOWA. THE STORMS WERE OCCURRING FROM 25 MILES NORTHWEST TO 35 MILES NORTHEAST OF SPENCER...AND 20 MILES SOUTH OF MASON CITY. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...HAIL...STRONG WINDS AND DANGEROUS LIGHTNING. THE STORMS WERE OCCURRING IN AN AREA OF SHOWERS AND STORMS OCCURRING NORTH OF A LINE FROM HAWARDEN TO NEAR WATERLOO. HAWARDEN IS 30 MILES NORTH OF SIOUX CITY. SCATTERED SHOWERS WERE ALSO OCCURRING IN A 25 MILE WIDE BAND EXTENDING FROM 15 MILES EAST OF FORT DODGE NEAR WEBSTER CITY...TO 40 MILES SOUTH OF OTTUMWA AT THE IOWA/MISSOURI BORDER. THE STORMS AND SHOWERS WERE MOVING EAST AT 30 MILES AN HOUR. JAK/BRF
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 3:24 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Dickinson | 28 min |
| Jun 29, 4:11 PM CDT | Flash Flood Warning | DMX | Dickinson | 3 hr |
| Jun 29, 4:30 PM CDT | Severe Thunderstorm Warning | DMX | Dickinson | 30 min |
| Jun 29, 5:01 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 39 min |
| Jun 29, 5:05 PM CDT | Flash Flood Warning | DMX | Emmet | 3 hr |
| Jun 29, 5:43 PM CDT | Flash Flood Warning | DMX | Kossuth, Palo Alto | 62 min |
| Jun 29, 5:43 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth, Palo Alto | 62 min |
| Jun 29, 5:46 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Dickinson | 59 min |
| Jun 29, 5:58 PM CDT | Tornado Warning | DMX | Kossuth | 32 min |
| Jun 29, 6:04 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 26 min |
| Jun 29, 6:10 PM CDT | Severe Thunderstorm Warning | DMX | Hancock | 50 min |
| Jun 29, 6:30 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 30 min |
| Jun 29, 6:42 PM CDT | Flash Flood Warning | DMX | Kossuth | 3 hr |
| Jun 29, 6:55 PM CDT | Flash Flood Warning | DMX | Buena Vista | 2 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.