A strong squall line associated with a cold front crossed through western Pennsylvania in the afternoon on the 1st. While most of the line remained sub-severe, a microburst over Neville Island caused the golf dome at Robert Morris University to collapse.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PBZ wrote it up.
A strong squall line associated with a cold front crossed through western Pennsylvania in the afternoon on the 1st. While most of the line remained sub-severe, a microburst over Neville Island caused the golf dome at Robert Morris University to collapse. In addition, an EF-1 tornado caused damage to parts of Ligonier Borough in Westmoreland county.
The local office's own words before the first event, 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 the first event at Jun 1, 2:08 PM EST, 2 hours 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 308 PM EDT FRI JUN 1 2012 .SYNOPSIS... A COLD FRONT WILL PUSH THROUGH THE REGION BY LATER THIS EVENING. IN ADVANCE OF THE FRONT, THUNDERSTORMS WILL DEVELOP THIS AFTERNOON..SOME STORMS COULD BE SEVERE WITH STRONG GUSTY WINDS AND HAIL. THE LOW PRESSURE SYSTEM WILL THEN STALL THIS WEEKEND NORTH OF THE GREAT LAKES, WHICH WILL KEEP COOL SHOWERY CONDITIONS ACROSS THE UPPER OHIO VALLEY INTO MONDAY. && .NEAR TERM /THROUGH SATURDAY/... PREFRONTAL BAND OF SHOWERS AND THUNDERSTORMS WILL BE ASSOCIATED WITH THE COLD FRONTAL PASSAGE THIS EVENING. HAVE INCLUDED THE MENTION OF GUSTY WINDS WITH THUNDERSTORMS THIS AFTERNOON. THERE IS A SLIGHT RISK OF TORNADOES IN THE MOUNTAINS SOUTH AND EAST OF PITTSBURGH. WITH THE COLD FRONT PUSHING EAST OF THE RIDGES LATER THIS EVENING SHOWERS AND ANY SEVERE THUNDERSTORM THREAT WILL END FROM WEST TO EAST. && .SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY/... A LOW PRESSURE CENTER WILL STALL OVER CENTRAL ONTARIO PROVINCE SATURDAY NIGHT BEFORE SLOWLY EXITING EAST THROUGH NEW YORK STATE LATE SUNDAY. THIS SCENARIO WILL CAUSE COOL SHOWERY CONDITIONS ACROSS THE UPPER OHIO VALLEY THIS WEEKEND. ACCORDINGLY, TEMPERATURES UNDER THIS PATTERN CAN BE 5 TO 10 DEGREES BELOW NORMAL THROUGH THE WEEKEND, AS INDICATED BY BLEND OF GFS AND NAM MOS. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... CONDITIONS WILL REMAIN UNSETTLED AS A CLOSED UPPER LOW SLOWLY SHIFTS EASTWARD OFF THE NEW ENGLAND COAST. ISOLATED TO SCATTERED SHOWERS WILL PERSIST FOR THE EACH DAY THROUGH FRIDAY. WHILE MOST OF THE HOURS OF THE DAY WILL BE DRY...WITH THE HEATING OF THE DAY AND UPPER LEVEL COLD POOLS PERSISTING SHOWERS WILL BE POSSIBLE IN THE LATE AFTERNOON AND EVENING HOURS. TEMPERATURES UNDER THE EXITING NORTHEASTERN CONUS TROF ARE FORECAST ABOUT 5 DEGREES UNDER THE SEASONAL AVERAGES. && .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/... SURFACE LOW WILL TRACK NORTHWARD ACROSS THE GREAT LAKES THROUGH TONIGHT. THIS SYSTEM WILL PUSH A COLD FRONT EASTWARD ACROSS THE TERMINALS THROUGH EARLY TONIGHT. LINES OF SHOWERS AND SCATTERED EMBEDDED THUNDERSTORMS WILL CROSS THE REGION AHEAD OF THE FRONT THROUGH 00Z. BRIEF IFR RESTRICTIONS ARE LIKELY IN HEAVIER RAIN WITH STORMS. SCATTERED RAIN SHOWERS ARE STILL POSSIBLE BEHIND THE COLD FRONT THIS EVENING...AND MVFR CEILINGS ARE FORECAST TO LINGER THROUGH SATURDAY MORNING. .OUTLOOK...SATURDAY AFTERNOON THROUGH WEDNESDAY... A CLOSED UPPER LOW WILL MEANDER SLOWLY EASTWARD ACROSS THE GREAT LAKES THROUGH THE WEEKEND AND OFF THE NEW ENGLAND COAST EARLY NEXT WEEK. RESTRICTIONS ARE POSSIBLE IN SCATTERED SHOWERS THROUGH TUESDAY. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 140 PM EDT FRI JUN 1 2012 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-029- 031-WVZ001>004-012-021-022-021745- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH- MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-FOREST- LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-ARMSTRONG- INDIANA-WASHINGTON-GREENE-HANCOCK-BROOKE-OHIO-MARSHALL-WETZEL-MARION- MONONGALIA- 140 PM EDT FRI JUN 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING. THE MAIN THREAT WILL BE DAMAGING WIND AND A CHANCE OF LARGE HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MDZ001-PAZ073>076-WVZ023-041-021745- GARRETT-WESTMORELAND-WESTMORELAND RIDGES-FAYETTE-FAYETTE RIDGES- PRESTON-TUCKER- 140 PM EDT FRI JUN 1 2012 ...TORNADO WATCH 332 IN EFFECT UNTIL 9 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...SOUTHWEST PENNSYLVANIA AND NORTHERN WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. TORNADO WATCH. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY THIS EVENING. THE MAIN THREAT WILL BE DAMAGING WIND AND LARGE HAIL WITH A CHANCE OF ISOLATED TORNADOES. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
428 PM EDT FRI JUN 01 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0408 PM HEAVY RAIN STRATTON 40.52N 80.63W
06/01/2012 M1.31 INCH JEFFERSON OH UTILITY COMPANY
REPORT FROM NEW CUMBERLAND LOCK AND DAM
&&
EVENT NUMBER PBZ1200493
RGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
512 PM EDT FRI JUN 01 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0510 PM HEAVY RAIN FARMINGTON 39.51N 80.25W
06/01/2012 M1.00 INCH MARION WV TRAINED SPOTTER
&&
EVENT NUMBER PBZ1200494
RGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
534 PM EDT FRI JUN 01 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0525 PM TORNADO LIGONIER 40.24N 79.24W
06/01/2012 WESTMORELAND PA EMERGENCY MNGR
TORNADO REPORTED ON WILPEN ROAD
&&
EVENT NUMBER PBZ1200495
RGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
535 PM EDT FRI JUN 01 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0534 PM TORNADO LIGONIER 40.24N 79.24W
06/01/2012 WESTMORELAND PA EMERGENCY MNGR
STRUCTURAL DAMAGE POSSIBLY FROM TORNADO
&&
EVENT NUMBER PBZ1200496
RGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
537 PM EDT FRI JUN 01 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0525 PM TSTM WND DMG LIGONIER 40.24N 79.24W
06/01/2012 WESTMORELAND PA EMERGENCY MNGR
MULTIPLE TREES DOWN ON CHURCH STREET
&&
EVENT NUMBER PBZ1200497
RGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
544 PM EDT FRI JUN 01 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0534 PM TSTM WND DMG LIGONIER 40.24N 79.24W
06/01/2012 WESTMORELAND PA PUBLIC
TREES DOWN
&&
EVENT NUMBER PBZ1200498
RGThe Pittsburgh radar (KPBZ), 141 km away, was scanning. The volume nearest the first event began at 21:48 UTC.
1 thunderstorm wind. Local standard time, as filed.
Emergency management reported numerous trees down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2012Every state in 2012This day in weather historyWarnings in Maryland, June 2012
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 394041.