Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 155, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 10, 1993, 11:05 PM CDT for Lucas County, Iowa. It was in force for 19 min.
The area
The counties it named.
The facts
- Issued
- Jul 10, 1993, 11:05 PM CDT (04:05 UTC)
- Expired
- Jul 10, 1993, 11:24 PM CDT
- In force
- 19 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Lucas County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 4.1 hours before the alert went out and 257 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
- 3233 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 992 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 6.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm 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 10, 8:44 PM CDT, 2 hours 21 minutes before
IAZALL-110240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 845 PM CDT SAT JUL 10 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PART OF EXTREME SOUTHEAST IOWA UNTIL 10 PM... AT 830 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS CONTINUED IN EXTREME SOUTH CENTRAL IOWA ALONG THE IOWA/MISSOURI BORDER. THE STORMS WERE LOCATED 60 MILES SOUTHEAST OF DES MOINES...OR SOUTH OF ALLERTON AND SEYMOUR. THESE STORMS WILL PRODUCE VERY HEAVY RAIN...AND MAY ALSO PRODUCE SMALL HAIL AND GUSTY WINDS. THE STORMS WERE OCCURRING IN AN AREA OF SHOWERS AND STORMS LOCATED GENERALLY SOUTH OF A LAMONI TO CEDAR RAPIDS LINE. OTHER WIDELY SCATTERED SHOWERS AND STORMS WERE OCCURRING OVER NORTHEAST AND NORTH CENTRAL IOWA...GENERALLY NORTH OF A LINE FROM MASON CITY TO FAYETTE...WHICH IS 35 MILES NORTHEAST OF WATERLOO. / THE STORMS AND SHOWERS WERE MOVING EAST AT 25 MILES AN HOUR. KALLMAN
Special weather statement, Jul 10, 8:45 PM CDT, 2 hours 20 minutes before
IAZALL-110240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 845 PM CDT SAT JUL 10 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PART OF EXTREME SOUTHEAST IOWA UNTIL 10 PM... AT 830 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS CONTINUED IN EXTREME SOUTH CENTRAL IOWA ALONG THE IOWA/MISSOURI BORDER. THE STORMS WERE LOCATED 60 MILES SOUTHEAST OF DES MOINES...OR SOUTH OF ALLERTON AND SEYMOUR. THESE STORMS WILL PRODUCE VERY HEAVY RAIN...AND MAY ALSO PRODUCE SMALL HAIL AND GUSTY WINDS. THE STORMS WERE OCCURRING IN AN AREA OF SHOWERS AND STORMS LOCATED GENERALLY SOUTH OF A LAMONI TO CEDAR RAPIDS LINE. OTHER WIDELY SCATTERED SHOWERS AND STORMS WERE OCCURRING OVER NORTHEAST AND NORTH CENTRAL IOWA...GENERALLY NORTH OF A LINE FROM MASON CITY TO FAYETTE...WHICH IS 35 MILES NORTHEAST OF WATERLOO. / THE STORMS AND SHOWERS WERE MOVING EAST AT 25 MILES AN HOUR. KALLMAN
Special weather statement, Jul 10, 9:43 PM CDT, 1 hour 22 minutes before
IAZALL-110340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 943 PM CDT SAT JUL 10 1993 ...A FLASH FLOOD WATCH IS IN EFFECT FOR IOWA FOR TONIGHT... AT 930 PM CDT...THE STRONG STORMS OVER EXTREME SOUTH CENTRAL IOWA HAD MOVED INTO NORTHERN MISSOURI. HOWEVER SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED OVER THE SOUTH CENTRAL AND SOUTHEAST COUNTIES... SOUTHEAST OF A LINE FROM 60 MILES SOUTH OF DES MOINES AT LAMONI...TO OTTUMWA...TO DAVENPORT. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. A FEW SHOWERS ALSO CONTINUED OVER FAR NORTH CENTRAL IOWA...NORTH OF A LINE FROM NORTHWOOD TO CRESCO. NORTHWOOD IS 20 MILES NORTH OF MASON CITY...AND CRESCO IS 40 MILES NORTHEAST OF MASON CITY. IN ADDITION...SCATTERED SHOWERS AND THUNDERSTORMS WERE BEGINNING TO MOVE INTO NORTHWEST IOWA...40 MILES NORTH OF SIOUX CITY NEAR ROCK RAPIDS AND SIOUX CENTER. THE SHOWERS AND STORMS IN NORTHERN IOWA WERE MOVING EAST AT 25 MILES AN HOUR. KALLMAN
Special weather statement, Jul 10, 9:43 PM CDT, 1 hour 22 minutes before
IAZALL-110340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 943 PM CDT SAT JUL 10 1993 ...A FLASH FLOOD WATCH IS IN EFFECT FOR IOWA FOR TONIGHT... AT 930 PM CDT...THE STRONG STORMS OVER EXTREME SOUTH CENTRAL IOWA HAD MOVED INTO NORTHERN MISSOURI. HOWEVER SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED OVER THE SOUTH CENTRAL AND SOUTHEAST COUNTIES... SOUTHEAST OF A LINE FROM 60 MILES SOUTH OF DES MOINES AT LAMONI...TO OTTUMWA...TO DAVENPORT. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. A FEW SHOWERS ALSO CONTINUED OVER FAR NORTH CENTRAL IOWA...NORTH OF A LINE FROM NORTHWOOD TO CRESCO. NORTHWOOD IS 20 MILES NORTH OF MASON CITY...AND CRESCO IS 40 MILES NORTHEAST OF MASON CITY. IN ADDITION...SCATTERED SHOWERS AND THUNDERSTORMS WERE BEGINNING TO MOVE INTO NORTHWEST IOWA...40 MILES NORTH OF SIOUX CITY NEAR ROCK RAPIDS AND SIOUX CENTER. THE SHOWERS AND STORMS IN NORTHERN IOWA WERE MOVING EAST AT 25 MILES AN HOUR. KALLMAN
Special weather statement, Jul 10, 10:48 PM CDT, 17 minutes before
IAZALL-110440- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1048 PM CDT SAT JUL 10 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL 4 AM SUNDAY MORNING... ...A FLASH FLOOD WATCH IS IN EFFECT FOR IOWA FOR TONIGHT... AT 1032 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS HAD REDEVELOPED OVER SOUTH CENTRAL IOWA. THE STORMS WERE LOCATED 60 MILES SOUTHWEST OF DES MOINES NEAR MOUNT AYR...AND 60 MILES SOUTH OF DES MOINES BETWEEN LAMONI AND LEON. THE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN AND FREQUENT LIGHTNING...AND POSSIBLY GUSTY WINDS AND SMALL HAIL. THESE STORMS WERE MOVING SLOWLY NORTHEAST AT 15 MILES AN HOUR. OTHER SHOWERS AND THUNDERSTORMS WERE LOCATED OVER SOUTHERN IOWA SOUTH OF A LINE FROM 40 MILES SOUTHWEST OF OTTUMWA AT CORYDON...TO DAVENPORT. THESE SHOWERS AND STORMS WERE MOVING EAST AT 20 MILES AN HOUR. / IN ADDITION...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED OVER NORTHERN IOWA...NORTH OF A LINE FROM SIOUX CITY TO 45 MILES NORTHEAST OF MASON CITY NEAR CRESCO. THESE SHOWERS AND STORMS WERE MOVING EAST AT 25 MILES AN HOUR. KALLMAN
Special weather statement, Jul 10, 10:48 PM CDT, 17 minutes before
IAZALL-110440- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1048 PM CDT SAT JUL 10 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL 4 AM SUNDAY MORNING... ...A FLASH FLOOD WATCH IS IN EFFECT FOR IOWA FOR TONIGHT... AT 1032 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS HAD REDEVELOPED OVER SOUTH CENTRAL IOWA. THE STORMS WERE LOCATED 60 MILES SOUTHWEST OF DES MOINES NEAR MOUNT AYR...AND 60 MILES SOUTH OF DES MOINES BETWEEN LAMONI AND LEON. THE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN AND FREQUENT LIGHTNING...AND POSSIBLY GUSTY WINDS AND SMALL HAIL. THESE STORMS WERE MOVING SLOWLY NORTHEAST AT 15 MILES AN HOUR. OTHER SHOWERS AND THUNDERSTORMS WERE LOCATED OVER SOUTHERN IOWA SOUTH OF A LINE FROM 40 MILES SOUTHWEST OF OTTUMWA AT CORYDON...TO DAVENPORT. THESE SHOWERS AND STORMS WERE MOVING EAST AT 20 MILES AN HOUR. / IN ADDITION...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED OVER NORTHERN IOWA...NORTH OF A LINE FROM SIOUX CITY TO 45 MILES NORTHEAST OF MASON CITY NEAR CRESCO. THESE SHOWERS AND STORMS WERE MOVING EAST AT 25 MILES AN HOUR. KALLMAN
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:25 PM CDT | Severe Thunderstorm Warning | DMX | Mitchell | 37 min |
| Jul 10, 8:39 PM CDT | Flash Flood Warning | DMX | Appanoose | 2 hr |
| Jul 10, 8:39 PM CDT | Flash Flood Warning | DMX | Wayne | 102 min |
| Jul 10, 11:36 PM CDT | Flash Flood Warning | DMX | Dickinson, Emmet | 3 hr |
| Jul 10, 11:56 PM CDT | Flash Flood Warning | DMX | Clay, Palo Alto | 3 hr |
| Jul 11, 6:10 AM CDT | Flash Flood Warning | DMX | Polk | 4 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 1993Every severe thunderstorm 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.