Alert archive / Alabama / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 464, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Aug 12, 1999, 3:00 PM CDT for Limestone County, Madison County, Alabama. It was in force for 50 min. 3 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
- Aug 12, 1999, 3:00 PM CDT (20:00 UTC)
- Expired
- Aug 12, 1999, 3:50 PM CDT
- In force
- 50 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
Counties Limestone County, AL, Madison County, AL
The radar
The Northeast Alabama radar (KHTX), 64 km from the middle of the area, began a volume at 20:03 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 |
|---|---|---|---|
| Aug 12, 3:48 PM CDT | Thunderstorm Wind 55 | Athens, AL | Trees and power lines were blown down throughout the city of Athens. One light pole was broken in half by the high wind. A few homes had minor roof damage when shingles were blown off. One home had its siding torn off. The Cloverleaf Apartments had a minor |
| Aug 12, 3:54 PM CDT | Hail 0.88 | Athens, AL | Nickel size hail was reported in downtown Athens. |
| Aug 12, 3:58 PM CDT | Hail 1 | Athens, AL | Pea to quarter size hail was reported in Athens. |
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
Nashville Metro, TN (KBNA), launched 12:00Z, 8.0 hours before the alert went out and 150 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
- 1559 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 988 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
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, Aug 12, 9:38 AM CDT, 5 hours 22 minutes before
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</html>Special weather statement, Aug 12, 9:38 AM CDT, 5 hours 22 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.
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</html>The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 1:56 PM CDT | Severe Thunderstorm Warning | BMX | Montgomery | 34 min |
| Aug 12, 2:56 PM CDT | Severe Thunderstorm Warning | BMX | Shelby | 34 min |
| Aug 12, 3:20 PM CDT | Severe Thunderstorm Warning | BMX | Limestone | 35 min |
| Aug 12, 3:52 PM CDT | Severe Thunderstorm Warning | BMX | Limestone | 18 min |
| Aug 12, 4:23 PM CDT | Severe Thunderstorm Warning | BMX | Madison | 32 min |
| Aug 12, 4:58 PM CDT | Severe Thunderstorm Warning | BMX | Jackson | 32 min |
| Aug 12, 5:39 PM CDT | Severe Thunderstorm Warning | BMX | Blount | 36 min |
| Aug 12, 6:07 PM CDT | Severe Thunderstorm Warning | BMX | Limestone | 33 min |
| Aug 12, 5:18 PM CDT | Severe Thunderstorm Warning | BMX | Chattahoochee, Muscogee | 32 min |
| Aug 12, 5:49 PM CDT | Severe Thunderstorm Warning | BMX | Chattahoochee, Muscogee | 31 min |
| Aug 12, 6:01 PM CDT | Severe Thunderstorm Warning | BMX | Stewart | 49 min |
| Aug 12, 6:24 PM CDT | Severe Thunderstorm Warning | BMX | Chattahoochee, Muscogee | 31 min |
| Aug 12, 6:54 PM CDT | Severe Thunderstorm Warning | BMX | Chattahoochee, Muscogee | 31 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1999Every severe thunderstorm warning in 1999
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.