Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 290, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Aug 24, 1998, 9:21 AM EDT for Lawrence County, Pennsylvania. It was in force for 54 min. 1 report 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 24, 1998, 9:21 AM EDT (13:21 UTC)
- Expired
- Aug 24, 1998, 10:15 AM EDT
- In force
- 54 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Lawrence County, PA
The radar
The Pittsburgh radar (KPBZ), 52 km from the middle of the area, began a volume at 13:23 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 24, 10:10 AM EDT | Thunderstorm Wind | Wampum, PA | Large trees were downed by thunderstorm winds. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 24, 9:00 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 1.4 hours before the alert went out and 68 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
- 1171 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 812 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 208 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 7.3
The text
As transmitted, in the capitals the NWS used until 2016.
319 WUUS1 KPIT 241322 RRA SVRPIT PAC073-241415- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 921 AM EDT MON AUG 24 1998 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... LAWRENCE COUNTY IN WESTERN PENNSYLVANIA. * UNTIL 1015 AM EDT. * AT AT 920 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR NEW BEDFORD...MOVING EAST AT 40 MPH. * THIS SEVERE THUNDERSTORM WILL BE NEAR... NEW CASTLE AT 930 AM. <<CALL TO ACTION>>DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS .END/STRAGER
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 24, 5:10 AM EDT, 4 hours 11 minutes before
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</html>Special weather statement, Aug 24, 5:10 AM EDT, 4 hours 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.
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</html>The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 8:50 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 43 min |
| Aug 24, 9:05 AM EDT | Severe Thunderstorm Warning | PBZ | Venango | 55 min |
| Aug 24, 9:36 AM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest | 54 min |
| Aug 24, 9:36 AM EDT | Severe Thunderstorm Warning | PBZ | Butler | 54 min |
| Aug 24, 9:46 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 44 min |
| Aug 24, 9:54 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Jefferson | 56 min |
| Aug 24, 10:42 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 58 min |
| Aug 24, 4:04 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 56 min |
| Aug 24, 5:09 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 56 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1998Every severe thunderstorm warning in 1998
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.