Alert archive / Iowa / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 93, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 29, 1996, 5:52 PM CDT for Clarke County, Union County, Iowa. It was in force for 53 min. 6 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 29, 1996, 5:52 PM CDT (22:52 UTC)
- Expired
- Jul 29, 1996, 6:45 PM CDT
- In force
- 53 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Clarke County, IA, Union County, IA
The radar
The Des Moines radar (KDMX), 82 km from the middle of the area, began a volume at 22:54 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 29, 6:00 PM CDT | Thunderstorm Wind 52 | Lorimor, IA | |
| Jul 29, 6:10 PM CDT | Hail 0.75 | Murray, IA | |
| Jul 29, 6:11 PM CDT | Hail 0.75 | Murray, IA | |
| Jul 29, 6:18 PM CDT | Hail 0.75 | Murray, IA | |
| Jul 29, 6:24 PM CDT | Thunderstorm Wind 52 | Murray, IA | |
| Jul 29, 6:32 PM CDT | Hail 1.75 | Murray, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.9 hours before the alert went out and 200 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
- 498 J/kg
- Mixed-layer CIN
- -161 J/kg
- Mixed-layer LCL
- 945 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
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 29, 12:03 PM CDT, 5 hours 49 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-291800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1150 AM CDT MON JUL 29 1996 ...NO WATCHES IN AFFECT FOR THE STATE OF IOWA... DUE TO A COMPUTER GLITCH IN THE COMMUNICATION SECTION OF THE SYSTEM SEVERE WEATHER WATCHES FROM SUNDAY JULY 28TH WERE RESENT OVER THE WEATHER WIRE SYSTEM. PLEASE IGNORE THESE PRODUCTS...HOWEVER SEVERE WEATHER IS A POSSBILITY LATER ON TODAY SO PAY ATTENTION TO THE DATE AND TIME ON THE PRODUCT. FORSTER
Special weather statement, Jul 29, 5:42 PM CDT, 10 minutes before
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</html>Special weather statement, Jul 29, 5:51 PM CDT, 1 minute before
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<body>
<main class="wrap">
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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<p id="message2">
Please try again in a few minutes.
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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 |
|---|---|---|---|---|
| Jul 29, 2:41 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 29 min |
| Jul 29, 3:00 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 30 min |
| Jul 29, 3:25 PM CDT | Severe Thunderstorm Warning | DMX | Madison | 35 min |
| Jul 29, 3:41 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 29 min |
| Jul 29, 4:27 PM CDT | Tornado Warning | DMX | Greene | 43 min |
| Jul 29, 5:04 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur | 41 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1996Every severe thunderstorm warning in 1996
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.