Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 114, NWS Pittsburgh, PA

June 1, 2004Butler County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 1, 2004, 6:40 PM EDT for Butler County, Pennsylvania. It was in force for 50 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 1, 2004, 6:40 PM EDT (22:40 UTC)
Expired
Jun 1, 2004, 7:30 PM EDT
In force
50 min
Issued by
NWS Pittsburgh, PA
Area
Counties, with a storm outline in the text

County Butler County, PA

The radar

The Pittsburgh radar (KPBZ), 49 km from the middle of the area, began a volume at 22:41 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 (KPIT), launched 12:00Z, 10.7 hours before the alert went out and 58 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.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2004-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2004-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
12 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
1542 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 1, 5:09 PM EDT, 1 hour 31 minutes earlier.

Area forecast discussion, Jun 1, 5:09 PM EDT, 1 hour 31 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PITTSBURGH PA
508 PM EDT TUE JUN  1 2004

2ND UPDATE TO ADD SVR TSTM WATCH FOR SWRN PA/RMNDR EXTREME NRN WVA AND
GARRETT CNTY MD. REST SAME.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
PA...PAZ020-021-023-029>032.
OH...OHZ039>041-048>050-057>059-068-069.
WV...WVZ001>004-012-021>023-041.
MD...MDZ001.
&&
Hazardous weather outlook, Jun 1, 10:11 AM EDT, 8 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
1011 AM EDT TUE JUN 1 2004

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029>032-WVZ001>004-012-021>023-041-011410-
ALLEGHENY PA-ARMSTRONG PA-BEAVER PA-BELMONT OH-BROOKE WV-BUTLER PA-
CARROLL OH-CLARION PA-COLUMBIANA OH-COSHOCTON OH-FAYETTE PA-
FOREST PA-GARRETT MD-GREENE PA-GUERNSEY OH-HANCOCK WV-HARRISON OH-
INDIANA PA-JEFFERSON PA-JEFFERSON OH-LAWRENCE PA-MARION WV-
MARSHALL WV-MERCER PA-MONONGALIA WV-MONROE OH-MUSKINGUM OH-NOBLE OH-
OHIO WV-PRESTON WV-TUCKER WV-TUSCARAWAS OH-VENANGO PA-WASHINGTON PA-
WESTMORELAND PA-WETZEL WV-
1011 AM EDT TUE JUN 1 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN PENNSYLVANIA
EAST CENTRAL OHIO...EXTREME NORTHERN WEST VIRGINIA AND
GARRETT COUNTY MARYLAND.

.DAY ONE...THIS AFTERNOON AND EVENING

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH EVENING.
THE PRIMARY WEATHER THREAT WILL BE LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER CALL TO ACTION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON.

In the hours before

Special weather statement, Jun 1, 5:33 PM EDT, 1 hour 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
533 PM EDT TUE JUN 1 2004

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ020-021-023-029>032-
WVZ001>004-012-021>023-041-012330-
ALLEGHENY PA-BEAVER PA-BELMONT OH-BROOKE WV-CARROLL OH-COLUMBIANA OH-
COSHOCTON OH-FAYETTE PA-GARRETT MD-GREENE PA-GUERNSEY OH-HANCOCK WV-
HARRISON OH-INDIANA PA-JEFFERSON OH-MARION WV-MARSHALL WV-
MONONGALIA WV-MONROE OH-MUSKINGUM OH-NOBLE OH-OHIO WV-PRESTON WV-
TUCKER WV-TUSCARAWAS OH-WASHINGTON PA-WESTMORELAND PA-WETZEL WV-
533 PM EDT TUE JUN 1 2004

...STRONG WIND POSSIBLE THIS EVENING...

A LINE OF SHOWERS AND THUNDERSTORMS WILL CROSS THE AREA THIS EVENING.
 THIS LINE WAS MOVING EAST AT 45 TO 50 MPH.  WIND GUSTS MAY
BE SUFFICIENT TO BREAK TREE BRANCHES AND DOWN ROTTEN TREES.

SEVERE STORMS ARE POSSIBLE ALONG THIS LINE AND A SEVERE THUNDERSTORM
WATCH WILL REMAIN IN EFFECT.  SEVERE STORMS PRODUCE DAMAGING WIND IN
EXCESS OF 58 MPH.

RESIDENTS SHOULD MOVE INDOORS AS THIS LINE OF SHOWERS AND
THUNDERSTORMS APPROACH.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.

15
Special weather statement, Jun 1, 5:48 PM EDT, 52 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
548 PM EDT TUE JUN 1 2004

PAZ007>009-013>016-022-012330-
ARMSTRONG PA-BUTLER PA-CLARION PA-FOREST PA-JEFFERSON PA-LAWRENCE PA-
MERCER PA-VENANGO PA-
548 PM EDT TUE JUN 1 2004

SCATTERED THUNDERSTORMS WILL CONTINUE TO CROSS THE AREA THIS EVENING.
 THESE STORMS WILL DIMINISH AS SUNSET APPROACHES...BUT THEY MAY
PRODUCE STRONG WIND GUSTS AS THEY COLLAPSE. THE WIND GUSTS MAY BE
SUFFICIENT TO BREAK SMALL TREE BRANCHES AND DOWN ROTTEN TREES.

RESIDENTS SHOULD MOVE INDOORS IF A THUNDERSTORM APPROACHES.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.

15
Local storm report, Jun 1, 6:39 PM EDT, 1 minute before
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The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 1, 4:34 PM EDTSevere Thunderstorm WarningPBZMercer26 min
Jun 1, 4:59 PM EDTSevere Thunderstorm WarningPBZButler61 min
Jun 1, 6:17 PM EDTSevere Thunderstorm WarningPBZMercer28 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2004Every severe thunderstorm warning in 2004

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.