Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 52, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 30, 1994, 10:03 PM CDT for Grundy County, Iowa. It was in force for 25 min.
The area
The counties it named.
The facts
- Issued
- May 30, 1994, 10:03 PM CDT (03:03 UTC)
- Expired
- May 30, 1994, 10:28 PM CDT
- In force
- 25 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Grundy County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 3.1 hours before the alert went out and 280 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
- 2185 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- -182 m²/s²
- 0-3 km storm-relative helicity
- -23 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, May 30, 6:36 PM CDT, 3 hours 27 minutes before
IAZ006>011-016>019-026>029-038>040-310040- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 635 PM CDT MON MAY 30 1994 ...A LINE OF STRONG THUNDERSTORMS WAS MOVING INTO NORTHEAST IOWA... AT 630 PM CDT...NATIONAL WEATHER SERVICE RADAR IN WATERLOO INDICATED A LINE OF STRONG THUNDERSTORMS IN WINNEBAGO COUNTY...EXTENDING FROM JUST SOUTHEAST OF BUFFALO CENTER...THROUGH LAKE MILLS...AND STRETCHING INTO MINNESOTA. PRELIMINARY MOVEMENT OF THESE STORMS WAS EAST AT 30 MILES AN HOUR. THESE STORMS SHOULD AFFECT THE TOWNS OF FOREST CITY...CLEAR LAKE... AND NORTHWOOD THROUGH 730 PM. SOME OF THESE STORMS MAY CONTAIN SMALL HAIL...GUSTY WINDS...DEADLY LIGHTNING AND VERY HEAVY DOWNPOURS OF RAIN. AT SIGNS OF AN IMPENDING STORM...TOWERING THUNDERHEADS...DARKENING SKIES...LIGHTNING AND INCREASING WINDS...MOVE TO A PLACE OF SAFETY. TUNE IN NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR THE LATEST WEATHER INFORMATION. DfEWALD
Special weather statement, May 30, 7:11 PM CDT, 2 hours 52 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-310115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 711 PM CDT MON MAY 30 1994 ...INTENSE THUNDERSTORMS DEVELOPING RAPIDLY IN NORTH CENTRAL IOWA... AT 710 PM RADAR INDICATED INTENSE THUNDERSTORMS DEVELOPING 15 MILES NORTH OF MASON CITY. THESE STORMS WERE MOVING RAPIDLY EAST AT 40 MPH AND WILL AFFECT NORTHWOOD...CARPENTER AND MANLY THROUGH 740 PM. THESE STORMS WILL PRODUCE MARBLE SIZE HAIL AND GUSTY WINDS OF 40 TO 50 MPH ALONG WITH BRIEF HEAVY RAINS AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD SEEK SAFE SHELTER AS THESE STORMS APPROACH. NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIVED. COLLAR
Special weather statement, May 30, 7:12 PM CDT, 2 hours 51 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-310115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 711 PM CDT MON MAY 30 1994 ...INTENSE THUNDERSTORMS DEVELOPING RAPIDLY IN NORTH CENTRAL IOWA... AT 710 PM RADAR INDICATED INTENSE THUNDERSTORMS DEVELOPING 15 MILES NORTH OF MASON CITY. THESE STORMS WERE MOVING RAPIDLY EAST AT 40 MPH AND WILL AFFECT NORTHWOOD...CARPENTER AND MANLY THROUGH 740 PM. THESE STORMS WILL PRODUCE MARBLE SIZE HAIL AND GUSTY WINDS OF 40 TO 50 MPH ALONG WITH BRIEF HEAVY RAINS AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD SEEK SAFE SHELTER AS THESE STORMS APPROACH. NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIVED. COLLAR
Special weather statement, May 30, 8:45 PM CDT, 1 hour 18 minutes before
IAZALL-310240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECT HEADER NATIONAL WEATHER SERVICE DES MOINES IOWA 845 PM CDT MON MAY 30 1994 AT 825 PM CDT...VERY STRONG THUNDERSTORMS WERE OCCURRING OVER NORTH CENTRL AND NORTHEAST IOWA. THESE STORMS WERE LOCATED MASON CITY TO 30 MILES EAST OF MASON CITY. THESE STORMS WERE CAPABLE OF PRODUCING PEA TO MARBLE SIZE HAIL...TORRENTIAL RAINS...AND WIND GUSTS TO 50 MILES AN HOUR. PERSONS IN THE PATH OF THESE STORMS ARE URGED TO MONITOR LOCAL BROADCASTS AND BE ALERT. THE STORMS WERE MOVING EAST AT 25 MILES AN HOUR. MILLER
Special weather statement, May 30, 9:39 PM CDT, 24 minutes before
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</html>Special weather statement, May 30, 9:40 PM CDT, 23 minutes before
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<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.
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 7:14 PM CDT | Severe Thunderstorm Warning | DMX | Worth | 31 min |
| May 30, 7:58 PM CDT | Severe Thunderstorm Warning | DMX | Mitchell | 32 min |
| May 30, 9:00 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Floyd | 30 min |
| May 30, 9:32 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 58 min |
| May 30, 10:03 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 57 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1994Every severe thunderstorm warning in 1994
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.