Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 70, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 20, 2009, 2:47 AM EDT for 4 counties in Pennsylvania. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 20, 2009, 2:47 AM EDT (06:47 UTC)
- Expired
- Jun 20, 2009, 3:45 AM EDT
- In force
- 58 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
Counties Armstrong County, PA, Clarion County, PA, Indiana County, PA, Jefferson County, PA
The radar
The Pittsburgh radar (KPBZ), 94 km from the middle of the area, began a volume at 06:48 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
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 6.8 hours before the alert went out and 225 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
- 1131 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 2:14 AM EDT, 33 minutes earlier.
Area forecast discussion, Jun 20, 2:14 AM EDT, 33 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, Jun 19, 9:40 PM EDT, 5 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 940 PM EDT FRI JUN 19 2009 MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ013-020-021-029>032- WVZ001>004-012-021>023-041-210145- GARRETT-TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON- JEFFERSON OH-MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-LAWRENCE-BEAVER- ALLEGHENY-WASHINGTON-WESTMORELAND-GREENE-FAYETTE-HANCOCK-BROOKE-OHIO- MARSHALL-WETZEL-MARION-MONONGALIA-PRESTON-TUCKER- 940 PM EDT FRI JUN 19 2009 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST CENTRAL OHIO...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. THE THREAT OF SEVERE THUNDERSTORMS AND FLASH FLOODS CONTINUES OVERNIGHT AS A SECOND THUNDERSTORM COMPLEX MOVES THROUGH THE UPPER OHIO VALLEY. RAIN AMOUNTS EXCEEDING 2 INCHES IN LESS THAN 3 HOURS CAN CAUSE FLASH FLOODING. PRIME SEVERE HAZARD IS DAMAGING WIND. SECONDARY SEVERE HAZARD IS LARGE HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. THE REMNANTS OF THE THUNDERSTORM COMPLEX WILL BE EXITING THE AREA ON SATURDAY MORNING. THERE IS A SLIGHT RISK OF SEVERE STORMS AND FLASH FLOODING UNTIL THE SYSTEM PASSES. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. PAZ007>009-014>016-022-023-210145- MERCER-VENANGO-FOREST-BUTLER-CLARION-JEFFERSON PA-ARMSTRONG-INDIANA- 940 PM EDT FRI JUN 19 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST PENNSYLVANIA AND WEST CENTRAL PENNSYLVANIA. .DAY ONE...TONIGHT. THE THREAT OF SEVERE THUNDERSTORMS AND FLASH FLOODS CONTINUES OVERNIGHT AS A SECOND THUNDERSTORM COMPLEX MOVES THROUGH THE UPPER OHIO VALLEY. RAIN AMOUNTS EXCEEDING 2 INCHES IN LESS THAN 3 HOURS CAN CAUSE FLASH FLOODING. PRIME SEVERE HAZARD IS DAMAGING WIND. SECONDARY SEVERE HAZARD IS LARGE HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THE REMNANTS OF THE THUNDERSTORM COMPLEX WILL BE EXITING THE AREA ON SATURDAY MORNING. THERE IS A SLIGHT RISK OF SEVERE STORMS AND FLASH FLOODING UNTIL THE SYSTEM PASSES. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
In the hours before
Special weather statement, Jun 19, 11:10 PM EDT, 3 hours 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 1110 PM EDT FRI JUN 19 2009 OHZ057-058-068-069-200400- GUERNSEY OH-MONROE OH-MUSKINGUM OH-NOBLE OH- 1110 PM EDT FRI JUN 19 2009 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... MONROE...NOBLE...MUSKINGUM AND GUERNSEY... AT 1108 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 3 MILES NORTH OF CUMBERLAND...MOVING EAST AT 25 MPH. WIND GUSTS TO 40 MPH...HAIL UP TO ONE HALF INCH IN DIAMETER...AND RAINFALL UP TO ONE HALF INCH IS POSSIBLE WITH THESE STORMS. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... HIGH HILL... CUMBERLAND... BELLE VALLEY... WOLF RUN STATE PARK... BYESVILLE... SARAHSVILLE... SENECAVILLE... OLD WASHINGTON... SENECA LAKE PARK... SUMMERFIELD... QUAKER CITY... KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
Special weather statement, Jun 19, 11:55 PM EDT, 2 hours 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 1155 PM EDT FRI JUN 19 2009 OHZ059-068-069-WVZ003-004-012-200500- BELMONT OH-MARSHALL WV-MONROE OH-NOBLE OH-OHIO WV-WETZEL WV- 1155 PM EDT FRI JUN 19 2009 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... MONROE...NOBLE...BELMONT...WETZEL...MARSHALL AND OHIO... AT 1154 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS OVER WOODSFIELD...MOVING EAST AT 20 MPH. WIND GUSTS TO 40 MPH...HAIL UP TO ONE HALF INCH IN DIAMETER...AND RAINFALL UP TO ONE HALF INCH IS POSSIBLE WITH THESE STORMS. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... LEWISVILLE... GRAYSVILLE... WOODSFIELD... ANTIOCH... BARNESVILLE... SOMERTON... BENWOOD... BETHESDA... ROUND BOTTOM... MORRISTOWN... CAMERON... FLUSHING... KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
Special weather statement, Jun 20, 1:06 AM EDT, 1 hour 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 106 AM EDT SAT JUN 20 2009 OHZ041-049-050-PAZ007-008-013>015-020>023-029>032-WVZ001-002- 200700- COLUMBIANA-HARRISON-JEFFERSON OH-MERCER-VENANGO-LAWRENCE-BUTLER- CLARION-BEAVER-ALLEGHENY-ARMSTRONG-INDIANA-WASHINGTON- WESTMORELAND-GREENE-FAYETTE-HANCOCK-BROOKE- INCLUDING THE CITIES OF...EAST LIVERPOOL...SALEM...COLUMBIANA... EAST PALESTINE...WELLSVILLE...CALCUTTA...CADIZ...HOPEDALE... STEUBENVILLE...SHARON...HERMITAGE...GROVE CITY...GREENVILLE... FARRELL...OIL CITY...FRANKLIN...SUGARCREEK...NEW CASTLE... ELLWOOD CITY...BUTLER...ZELIENOPLE...CLARION...ALIQUIPPA... BEAVER FALLS...AMBRIDGE...MONACA...BEAVER... PITTSBURGH METRO AREA...KITTANNING...FORD CITY...LEECHBURG... FREEPORT...APOLLO...INDIANA...WASHINGTON...CANONSBURG...DONORA... CALIFORNIA...CHARLEROI...MONONGAHELA...MCMURRAY...GREENSBURG... NEW KENSINGTON...JEANNETTE...LATROBE...MONESSEN...WAYNESBURG... FAIRDALE...UNIONTOWN...CONNELLSVILLE...OHIOPYLE...TORONTO... WEIRTON 106 AM EDT SAT JUN 20 2009 SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE EAST AT 25 MPH. THE STRONGER STORMS ARE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH...HAIL UP TO ONE HALF INCH IN DIAMETER...AND RAINFALL OF UP TO ONE HALF INCH.
Special weather statement, Jun 20, 2:35 AM EDT, 12 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 |
|---|---|---|---|---|
| Jun 20, 1:45 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 45 min |
| Jun 20, 1:57 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Forest, Lawrence, Mercer and 1 more | 63 min |
| Jun 19, 8:08 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey, Muskingum, Noble | 19 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2009Every severe thunderstorm warning in 2009
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.