Alert archive / Pennsylvania / Flash Flood Watches in 2017
Flash Flood Watch 3, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood watch at May 28, 2017, 11:11 AM EDT for 5 counties in Pennsylvania; 4 counties in West Virginia. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- May 28, 2017, 11:11 AM EDT (15:11 UTC)
- Expired
- May 28, 2017, 7:14 PM EDT
- In force
- 8 hr
- Issued by
- NWS Pittsburgh, PA
- Flood severity
- None
Counties Allegheny County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Marion County, WV, Monongalia County, WV, Preston County, WV, Tucker County, WV
The radar
The Pittsburgh radar (KPBZ), 83 km from the middle of the area, began a volume at 15:13 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.
The nearest sounding before it
Pittsburgh, PA (KAGC), launched 12:00Z, 3.2 hours before the alert went out and 67 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
- 948 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pittsburgh, PA wrote its last area forecast discussion before this flash flood watch went out at May 28, 9:36 AM EDT, 1 hour 35 minutes earlier.
Area forecast discussion, May 28, 9:36 AM EDT, 1 hour 35 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>Hazardous weather outlook, May 28, 4:12 AM EDT, 6 hours 59 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>In the hours before
Special weather statement, May 28, 5:49 AM EDT, 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.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 3:49 PM EDT | Special Weather Statement | PBZ | Venango | 26 min |
| May 28, 3:54 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 36 min |
| May 28, 4:01 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 44 min |
| May 28, 4:12 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 33 min |
| May 28, 4:45 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 30 min |
| May 28, 4:46 PM EDT | Flash Flood Warning | PBZ | Clarion | 119 min |
| May 28, 4:49 PM EDT | Tornado Warning | PBZ | Clarion | 26 min |
| May 28, 4:56 PM EDT | Flash Flood Warning | PBZ | Forest, Venango | 94 min |
| May 28, 6:40 PM EDT | Areal Flood Warning | PBZ | Clarion | 3 hr |
| May 28, 7:34 PM EDT | Areal Flood Warning | PBZ | Venango | 3 hr |
Nearby
Flash Flood Watches in Pennsylvania, 2017Flash Flood Watches in West Virginia, 2017Every flash flood watch in 2017
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; radar from the NEXRAD Level II archive.