Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 71, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 17, 1993, 3:01 PM CDT for Hamilton County, Iowa. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- Jun 17, 1993, 3:01 PM CDT (20:01 UTC)
- Expired
- Jun 17, 1993, 3:45 PM CDT
- In force
- 44 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Hamilton County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 8.0 hours before the alert went out and 274 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
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, Jun 17, 1:45 PM CDT, 1 hour 16 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 14 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, 2:45 PM CDT, 16 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, 16 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
Local storm report, Jun 17, 2:50 PM CDT, 11 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Jun 17, 2:50 PM CDT, 11 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>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, 2:48 PM CDT | Tornado Warning | DMX | Chickasaw, Floyd, Howard, Mitchell | 42 min |
| Jun 17, 3:01 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 18 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
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.