Alert archive / Iowa / Tornado Warnings in 1993
Tornado Warning 23, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 8, 1993, 9:31 PM CDT for Chickasaw County, Iowa. It was in force for 29 min.
The area
The counties it named.
The facts
- Issued
- Jul 8, 1993, 9:31 PM CDT (02:31 UTC)
- Expired
- Jul 8, 1993, 10:00 PM CDT
- In force
- 29 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Chickasaw County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 2.5 hours before the alert went out and 224 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
- 71 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 1318 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KALO 090231 TORALO IAC037-090300- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE WATERLOO IA 931 PM CDT THU JUL 8 1993 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1000 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...CHICKASAW COUNTY AT 925 PM...A TORNADO WAS REPORTED ON THE GROUND 7 MILES NORTH OF NEW HAMPTON OR 30 MILES NORTH OF WATERLOO. THIS STORM WAS MOVING TO THE NORTHEAST AT 25 MILES AN HOUR. REPORTS OF A CAR BLOWN OF THE ROAD AS THE TORNADO PASSED. DURING A TORNADO...THE SAFEST PLACE IS IN A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE. ..SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. AVOID WINDOWS. LINDENBERG &
What forecasters said that day
The local office's own words before this tornado 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 8, 8:50 PM CDT, 41 minutes before
IAZALL-090245- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 850 PM CDT THU JUL 8 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL AND WESTERN IOWA UNTIL MIDNIGHT... AT 840 PM CDT...A LINE OF VERY STRONG THUNDERSTORMS CONTINUED FROM WEST CENTRAL INTO NORTH CENTRAL AND NORTHEAST IOWA. THE STORMS WERE LOCATED IN A 20 MILE WIDE BAND EXTENDING FROM 40 MILES NORTHEAST OF COUNCIL BLUFFS...TO 40 MILES NORTHWEST OF DES MOINES NEAR JEFFERSON...TO FORT DODGE...TO 15 MILES NORTH OF WATERLOO NEAR SUMNER. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...GUSTY WINDS AND HAIL. THE THUNDERSTORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND STORMS THAT WERE OCCURRING NORTH OF A LINE FROM COUNCIL BLUFFS TO 50 MILES NORTHEAST OF WATERLOO NEAR ELKADER. THE STORMS AND SHOWERS WERE MOVING EAST AT 30 MILES AN HOUR. / KALLMAN
Special weather statement, Jul 8, 8:50 PM CDT, 41 minutes before
IAZALL-090245- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 850 PM CDT THU JUL 8 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL AND WESTERN IOWA UNTIL MIDNIGHT... AT 840 PM CDT...A LINE OF VERY STRONG THUNDERSTORMS CONTINUED FROM WEST CENTRAL INTO NORTH CENTRAL AND NORTHEAST IOWA. THE STORMS WERE LOCATED IN A 20 MILE WIDE BAND EXTENDING FROM 40 MILES NORTHEAST OF COUNCIL BLUFFS...TO 40 MILES NORTHWEST OF DES MOINES NEAR JEFFERSON...TO FORT DODGE...TO 15 MILES NORTH OF WATERLOO NEAR SUMNER. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...GUSTY WINDS AND HAIL. THE THUNDERSTORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND STORMS THAT WERE OCCURRING NORTH OF A LINE FROM COUNCIL BLUFFS TO 50 MILES NORTHEAST OF WATERLOO NEAR ELKADER. THE STORMS AND SHOWERS WERE MOVING EAST AT 30 MILES AN HOUR. / KALLMAN
Special weather statement, Jul 8, 9:05 PM CDT, 26 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-090315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 905 PM CDT THU JUL 8 1993 ...THUNDERSTORMS CONTINUE TO DUMP HEAVY RAIN ACROSS NORTH CENTRAL AND NORTHEAST IOWA... AT 900 PM...STRONG THUNDERSTORMS WERE PRODUCING VERY HEAVY RAINS ALONG WITH WINDS NEAR 45 MILES AN HOUR. THESE THUNDERSTORMS WERE LOCATED FROM AROUND HAMPTON TO MARBLE ROCK AND SUMNER...ABOUT 35 MILES WEST OF WATERLOO AND 25 MILES NORTH. THIS RAIN COULD CAUSE SOME SMALL STREAMS AND POSSIBLE LOW LAND FLOODING IN THE CEDAR AND WAPSIPINICON RIVER BASIN. TOWNS EFFECTED BY THESE THUNDERSTORMS BETWEEN 910 PM AND 10 PM WILL BE NEW HAMPTON...NASHUA...FREDERICKSBURG AND ALPHA AS THEY MOVE NORTHEAST AT 25 MILES AN HOUR. THIS RAIN SITUATION SHOULD BE WATCHED CLOSELY. THE GROUND IS SATURATED AND STREAMS ARE ALREADY HIGHER THAN NORMAL. IF DRIVING TONIGHT DO NOT CROSS FLOODED ROADWAYS AND BE PREPARED TO MOVE TO HIGHER GROUND IF FLOODING STARTS TO OCCUR. STAY TUNED TO RADIO ...NOAA WEATHER RADIO AND TV FOR LATER WEATHER STATEMENTS AS A SEVERE THUNDERSTORM WATCH REMAIN IN EFFECT UNTIL MIDNIGHT FOR MUCH OF NORTH CENTRAL AND NORTHEAST IOWA ALONG AND WEST OF HIGHWAY 63. RR
Special weather statement, Jul 8, 9:08 PM CDT, 23 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-090315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 905 PM CDT THU JUL 8 1993 ...THUNDERSTORMS CONTINUE TO DUMP HEAVY RAIN ACROSS NORTH CENTRAL AND NORTHEAST IOWA... AT 900 PM...STRONG THUNDERSTORMS WERE PRODUCING VERY HEAVY RAINS ALONG WITH WINDS NEAR 45 MILES AN HOUR. THESE THUNDERSTORMS WERE LOCATED FROM AROUND HAMPTON TO MARBLE ROCK AND SUMNER...ABOUT 35 MILES WEST OF WATERLOO AND 25 MILES NORTH. THIS RAIN COULD CAUSE SOME SMALL STREAMS AND POSSIBLE LOW LAND FLOODING IN THE CEDAR AND WAPSIPINICON RIVER BASIN. TOWNS EFFECTED BY THESE THUNDERSTORMS BETWEEN 910 PM AND 10 PM WILL BE NEW HAMPTON...NASHUA...FREDERICKSBURG AND ALPHA AS THEY MOVE NORTHEAST AT 25 MILES AN HOUR. THIS RAIN SITUATION SHOULD BE WATCHED CLOSELY. THE GROUND IS SATURATED AND STREAMS ARE ALREADY HIGHER THAN NORMAL. IF DRIVING TONIGHT DO NOT CROSS FLOODED ROADWAYS AND BE PREPARED TO MOVE TO HIGHER GROUND IF FLOODING STARTS TO OCCUR. STAY TUNED TO RADIO ...NOAA WEATHER RADIO AND TV FOR LATER WEATHER STATEMENTS AS A SEVERE THUNDERSTORM WATCH REMAIN IN EFFECT UNTIL MIDNIGHT FOR MUCH OF NORTH CENTRAL AND NORTHEAST IOWA ALONG AND WEST OF HIGHWAY 63. RR
Special weather statement, Jul 8, 9:12 PM CDT, 19 minutes before
IAZ043>050-056>061-070-090300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 912 PM CDT THU JUL 8 1993 THE FOLLOWING COUNTIES IN IOWA WILL REMAIN UNDER SEVERE THUNDERSTORM WATCH NUMBER 621 UNTIL 930 PM CDT. AFTER WHICH...THE COUNTIES WILL BE UNDER TORNADO WATCH 623 WHICH BEGINS AT 930 PM AND CONTINUES UNTIL 400 AM CDT FRIDAY...JULY 9: MONONA CRAWFORD CARROLL GREENE BOONE STORY MARSHALL TAMA HARRISON SHELBY AUDUBON GUTHRIE DALLAS POLK JASPER POTTAWATTAMIE CASS MILLS END/CHB
Special weather statement, Jul 8, 9:12 PM CDT, 19 minutes before
IAZ043>050-056>061-070-090300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 912 PM CDT THU JUL 8 1993 THE FOLLOWING COUNTIES IN IOWA WILL REMAIN UNDER SEVERE THUNDERSTORM WATCH NUMBER 621 UNTIL 930 PM CDT. AFTER WHICH...THE COUNTIES WILL BE UNDER TORNADO WATCH 623 WHICH BEGINS AT 930 PM AND CONTINUES UNTIL 400 AM CDT FRIDAY...JULY 9: MONONA CRAWFORD CARROLL GREENE BOONE STORY MARSHALL TAMA HARRISON SHELBY AUDUBON GUTHRIE DALLAS POLK JASPER POTTAWATTAMIE CASS MILLS END/CHB
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 7:12 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 43 min |
| Jul 8, 7:12 PM CDT | Severe Thunderstorm Warning | DMX | Carroll | 48 min |
| Jul 8, 8:05 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene, Guthrie | 55 min |
| Jul 8, 8:27 PM CDT | Flash Flood Warning | DMX | Carroll, Crawford, Greene | 4 hr |
| Jul 8, 8:57 PM CDT | Tornado Warning | DMX | Carroll, Crawford | 19 min |
| Jul 8, 9:09 PM CDT | Tornado Warning | DMX | Boone | 36 min |
| Jul 8, 9:29 PM CDT | Flash Flood Warning | DMX | Boone, Story | 4 hr |
| Jul 8, 9:29 PM CDT | Flash Flood Warning | DMX | Dallas, Guthrie | 4 hr |
| Jul 8, 9:52 PM CDT | Tornado Warning | DMX | Boone, Dallas | 38 min |
| Jul 8, 10:03 PM CDT | Tornado Warning | DMX | Dallas, Polk | 27 min |
| Jul 8, 10:47 PM CDT | Flash Flood Warning | DMX | Black Hawk | 3 hr |
| Jul 8, 10:52 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 20 min |
| Jul 8, 11:25 PM CDT | Flash Flood Warning | DMX | Jasper, Polk | 5 hr |
| Jul 8, 11:25 PM CDT | Flash Flood Warning | DMX | Marshall | 5 hr |
| Jul 8, 11:40 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll, Crawford | 35 min |
| Jul 8, 11:40 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Cass, Taylor | 35 min |
| Jul 8, 11:49 PM CDT | Flash Flood Warning | DMX | Buchanan | 3 hr |
| Jul 9, 12:02 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Ringgold, Union | 28 min |
| Jul 9, 12:02 AM CDT | Severe Thunderstorm Warning | DMX | Greene, Guthrie | 28 min |
| Jul 9, 12:22 AM CDT | Flash Flood Warning | DMX | Carroll, Greene | 4 hr |
| Jul 9, 12:22 AM CDT | Flash Flood Warning | DMX | Audubon | 4 hr |
| Jul 9, 12:33 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison, Polk, Warren | 27 min |
| Jul 9, 12:33 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur | 27 min |
| Jul 9, 1:01 AM CDT | Flash Flood Warning | DMX | Black Hawk | 119 min |
| Jul 9, 1:05 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas, Wayne | 25 min |
| Jul 9, 1:05 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk | 25 min |
| Jul 9, 1:05 AM CDT | Severe Thunderstorm Warning | DMX | Warren | 25 min |
| Jul 9, 1:22 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 23 min |
| Jul 9, 1:36 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Poweshiek | 54 min |
| Jul 9, 1:36 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Monroe, Wapello | 54 min |
| Jul 9, 1:36 AM CDT | Severe Thunderstorm Warning | DMX | Jasper | 49 min |
| Jul 9, 2:11 AM CDT | Severe Thunderstorm Warning | DMX | Jefferson, Keokuk, Van Buren, Washington | 49 min |
| Jul 9, 2:11 AM CDT | Severe Thunderstorm Warning | DMX | Iowa, Johnson | 49 min |
| Jul 9, 10:21 AM CDT | Flash Flood Warning | DMX | Story | 6 hr |
Nearby
Tornado Warnings in Iowa, 1993Every tornado warning in 1993Tornadoes 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.