Alert archive / Iowa / Tornado Warnings in 1993
Tornado Warning 11, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jun 17, 1993, 2:48 PM CDT for 4 counties in Iowa. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jun 17, 1993, 2:48 PM CDT (19:48 UTC)
- Expired
- Jun 17, 1993, 3:30 PM CDT
- In force
- 42 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Chickasaw County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 7.8 hours before the alert went out and 201 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
- 13 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 540 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- -16 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 KALO 171950 TORALO IAC067-131-037-089-172030- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE WATERLOO IA 248 PM CDT THU JUN 17 1993 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 330 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTH CENTRAL IOWA ...FLOYD COUNTY...EASTERN MITCHELL COUNTY IN NORTHEAST IOWA ...WESTERN CHICKASAW COUNTY...HOWARD COUNTY AT 243 PM CDT...NATIONAL WEATHER SERVICE RADAR IN WATERLOO INDICATED A POSSIBLE TORNADO PRODUCING THUNDERSTORM 3 MILES NORTHWEST OF CHARLES CITY OR 55 MILES EAST OF MASON CITY MOVING NORTHEAST AT 30 MPH. SOME CITIES AND TOWNS IN THE PATH OF THIS STORM ARE COLWELL...ALTA VISTA... ELMA AND CHARLES CITY. 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. THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. YOU SHOULD SEEK SHELTER BELOW GROUND LEVEL IF POSSIBLE. OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE AND AVOID WINDOWS. GOODSON/LINDENBER<G
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, Jun 17, 1:40 PM CDT, 1 hour 8 minutes before
IAZALL-171940- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 140 PM CDT THU JUN 17 1993 AT 130 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS WERE OCCURRING OVER NORTH CENTRAL IOWA. THE STORMS WERE LOCATED 10 MILES NORTH OF FORT DODGE NEAR HUMBOLDT...AND 25 MILES NORTHEAST OF FORT DODGE. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...HAIL...GUSTY WINDS AND FREQUENT LIGHTNING. THE STORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS OCCURRING OVER THE NORTHWEST THIRD OF IOWA. THE PRECIPITATION WAS NORTHWEST OF A LINE FROM COUNCIL BLUFFS...TO 15 MILES SOUTHEAST OF FORT DODGE NEAR WEBSTER CITY...TO MASON CITY. ISOLATED SHOWERS WERE ALSO IN SOUTHERN IOWA AROUND GREENFIELD...BEDFORD AND OSCEOLA. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT 25 MILES AN HOUR. KALLMAN
Special weather statement, Jun 17, 1:41 PM CDT, 1 hour 7 minutes before
IAZALL-171940- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 140 PM CDT THU JUN 17 1993 AT 130 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS WERE OCCURRING OVER NORTH CENTRAL IOWA. THE STORMS WERE LOCATED 10 MILES NORTH OF FORT DODGE NEAR HUMBOLDT...AND 25 MILES NORTHEAST OF FORT DODGE. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...HAIL...GUSTY WINDS AND FREQUENT LIGHTNING. THE STORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS OCCURRING OVER THE NORTHWEST THIRD OF IOWA. THE PRECIPITATION WAS NORTHWEST OF A LINE FROM COUNCIL BLUFFS...TO 15 MILES SOUTHEAST OF FORT DODGE NEAR WEBSTER CITY...TO MASON CITY. ISOLATED SHOWERS WERE ALSO IN SOUTHERN IOWA AROUND GREENFIELD...BEDFORD AND OSCEOLA. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT 25 MILES AN HOUR. KALLMAN
Special weather statement, Jun 17, 1:45 PM CDT, 1 hour 3 minutes before
IAZALL-180000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 145 PM CDT THU JUN 17 1993 ...A DANGEROUS RAIN EVENT IS EXPECTED ACROSS PARTS OF IOWA... OVER THE NEXT SEVERAL DAYS...RAINFALL AMOUNTS CLOSE TO FIVE INCHES ARE EXPECTED ACROSS PARTS OF THE STATE...WITH ISOLATED SPOTS RECEIVING EVEN MORE. A FLOOD WATCH IS POSTED FOR THE NORTHWEST TWO THIRDS OF THE STATE THROUGH TONIGHT. MANY RIVERS...ESPECIALLY ACROSS NORTHWEST AND NORTH CENTRAL IOWA...ARE NEAR OR ABOVE FLOOD STAGE. THIS HEAVY RAINFALL WILL FURTHER INCREASE THE FLOODING OR FLOODING THREAT. ALSO...THE STRONGEST STORMS WILL PRODUCE FLASH FLOODING OF SMALLER CREEKS AND STREAMS. INITIALLY...THROUGH TONIGHT...HEAVIEST RAINFALL IS EXPECTED ALONG AND ABOUT 40 MILES EITHER SIDE OF A LINE FROM NORTH OF OMAHA...TO FORT DODGE TO MASON CITY. SOME RIVER BASINS IN THIS AREA INCLUDE THE LITTLE SIOUX...RACCOON... ...BOYER...NISHNABOTNA...DES MOINES...CEDAR...IOWA...WASPSIPINICON AND SKUNK. THIS HEAVY RAIN IS CAUSED BY A NEARLY STATIONARY FRONT. HEADING INTO FRIDAY AND THEN THE WEEKEND...THIS FRONT WILL VERY SLOWLY DROP SOUTHEAST...SPREADING THE HEAVIEST RAIN INTO SOUTHEAST IOWA. IF YOU LIVE ALONG A RIVER...KEEP ALERT FOR RAPIDLY RISING WATER AND BE PREPARED TO MOVE TO HIGHER GROUND IF FLOODING IS OBSERVED OR A WARNING IS ISSUED. CAMPERS AND OTHER RECREATIONAL USERS SHOULD REMAIN AWAY FROM STREAM BEDS...CREEKS AND LOW DRAINAGE AREAS. JOHN FELDT METEOROLOGIST IN CHANGE
Special weather statement, Jun 17, 1:47 PM CDT, 1 hour 1 minute before
IAZALL-180000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 145 PM CDT THU JUN 17 1993 ...A DANGEROUS RAIN EVENT IS EXPECTED ACROSS PARTS OF IOWA... OVER THE NEXT SEVERAL DAYS...RAINFALL AMOUNTS CLOSE TO FIVE INCHES ARE EXPECTED ACROSS PARTS OF THE STATE...WITH ISOLATED SPOTS RECEIVING EVEN MORE. A FLOOD WATCH IS POSTED FOR THE NORTHWEST TWO THIRDS OF THE STATE THROUGH TONIGHT. MANY RIVERS...ESPECIALLY ACROSS NORTHWEST AND NORTH CENTRAL IOWA...ARE NEAR OR ABOVE FLOOD STAGE. THIS HEAVY RAINFALL WILL FURTHER INCREASE THE FLOODING OR FLOODING THREAT. ALSO...THE STRONGEST STORMS WILL PRODUCE FLASH FLOODING OF SMALLER CREEKS AND STREAMS. INITIALLY...THROUGH TONIGHT...HEAVIEST RAINFALL IS EXPECTED ALONG AND ABOUT 40 MILES EITHER SIDE OF A LINE FROM NORTH OF OMAHA...TO FORT DODGE TO MASON CITY. SOME RIVER BASINS IN THIS AREA INCLUDE THE LITTLE SIOUX...RACCOON... ...BOYER...NISHNABOTNA...DES MOINES...CEDAR...IOWA...WASPSIPINICON AND SKUNK. THIS HEAVY RAIN IS CAUSED BY A NEARLY STATIONARY FRONT. HEADING INTO FRIDAY AND THEN THE WEEKEND...THIS FRONT WILL VERY SLOWLY DROP SOUTHEAST...SPREADING THE HEAVIEST RAIN INTO SOUTHEAST IOWA. IF YOU LIVE ALONG A RIVER...KEEP ALERT FOR RAPIDLY RISING WATER AND BE PREPARED TO MOVE TO HIGHER GROUND IF FLOODING IS OBSERVED OR A WARNING IS ISSUED. CAMPERS AND OTHER RECREATIONAL USERS SHOULD REMAIN AWAY FROM STREAM BEDS...CREEKS AND LOW DRAINAGE AREAS. JOHN FELDT METEOROLOGIST IN CHANGE
Special weather statement, Jun 17, 2:45 PM CDT, 3 minutes before
IAZALL-172040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 245 PM CDT THU JUN 17 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CENTRAL AND EASTERN IOWA UNTIL 8 PM THIS EVENING... ...A FLOOD WATCH IS IN EFFECT FOR THE NORTHWEST TWO/THIRDS OF IOWA THIS AFTERNOON AND TONIGHT... AT 230 PM CDT...WIDELY SCATTERED STRONG THUNDERSTORMS CONTINUED OVER NORTH CENTRAL AND NORTHEAST IOWA. THE STRONG STORMS WERE IN A 20 MILE WIDE BAND LOCATED FROM 25 MILES SOUTHWEST OF FORT DODGE...TO 20 MILES EAST OF MASON CITY. ISOLATED STRONG STORMS WERE ALSO OCCURRING IN SOUTH CENTRAL IOWA BETWEEN MOUNT AYR AND CORYDON...OR FROM 60 MILES SOUTHWEST TO 50 MILES SOUTH OF DES MOINES. IN ADDITION TO PRODUCING EXTREMELY HEAVY RAIN AND FREQUENT LIGHTNING... PEA TO MARBLE SIZE HAIL AND GUSTY WINDS ARE ALSO POSSIBLE WITH THESE THUNDERSTORMS. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT AROUND 25 MILES AN HOUR. KALLMAN
Special weather statement, Jun 17, 2:45 PM CDT, 3 minutes before
IAZALL-172040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 245 PM CDT THU JUN 17 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CENTRAL AND EASTERN IOWA UNTIL 8 PM THIS EVENING... ...A FLOOD WATCH IS IN EFFECT FOR THE NORTHWEST TWO/THIRDS OF IOWA THIS AFTERNOON AND TONIGHT... AT 230 PM CDT...WIDELY SCATTERED STRONG THUNDERSTORMS CONTINUED OVER NORTH CENTRAL AND NORTHEAST IOWA. THE STRONG STORMS WERE IN A 20 MILE WIDE BAND LOCATED FROM 25 MILES SOUTHWEST OF FORT DODGE...TO 20 MILES EAST OF MASON CITY. ISOLATED STRONG STORMS WERE ALSO OCCURRING IN SOUTH CENTRAL IOWA BETWEEN MOUNT AYR AND CORYDON...OR FROM 60 MILES SOUTHWEST TO 50 MILES SOUTH OF DES MOINES. IN ADDITION TO PRODUCING EXTREMELY HEAVY RAIN AND FREQUENT LIGHTNING... PEA TO MARBLE SIZE HAIL AND GUSTY WINDS ARE ALSO POSSIBLE WITH THESE THUNDERSTORMS. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT AROUND 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 |
|---|---|---|---|---|
| Jun 17, 1:16 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 29 min |
| Jun 17, 1:42 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock | 48 min |
| Jun 17, 1:47 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 43 min |
| Jun 17, 3:01 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 18 min |
| Jun 17, 3:01 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 44 min |
| Jun 17, 3:15 PM CDT | Severe Thunderstorm Warning | DMX | Chickasaw, Howard, Winneshiek | 45 min |
| Jun 17, 3:46 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Monroe | 29 min |
| Jun 17, 4:20 PM CDT | Severe Thunderstorm Warning | DMX | Greene, Webster | 25 min |
| Jun 17, 4:26 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 34 min |
| Jun 17, 4:28 PM CDT | Severe Thunderstorm Warning | DMX | Jefferson, Van Buren | 32 min |
| Jun 17, 4:32 PM CDT | Severe Thunderstorm Warning | DMX | Keokuk | 28 min |
| Jun 17, 4:44 PM CDT | Severe Thunderstorm Warning | DMX | Washington | 31 min |
| Jun 17, 5:01 PM CDT | Severe Thunderstorm Warning | DMX | Washington | 14 min |
| Jun 17, 5:47 PM CDT | Flash Flood Warning | DMX | Black Hawk | 2 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.