3 thunderstorm wind, 1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 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 Jul 4, 1:56 PM EST, 16 hours 44 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 256 PM EDT WED JUL 4 2001 FIRST SHRT/WV MOVING THRU CWA ATTM HAS PROVIDED ENOUGH CLD CVG FOR LGT PRECIP THRU MOST OF DAY. 2ND SHRT WV ASSCD WITH UPPER TROUGH WILL SWING THRU BFR MIDN...THOUGH PRECIP ON WANE ATTM EXPECT UNSTABLE AIRMASS COMBINED WITH PLENTY LOW LVL MOISTURE/DYNAMICS TO REGENERATE PRECIP ONCE AGAIN. MAIN COLD FRONTAL BNDRY EXPECTED TO MOVE THRU CNTRL SXNS CWA ARND 06Z/05 AND NR M/D LINE BY 12Z/05 WITH ATTENDING PRECIP ALSO. WILL MAINTAIN CHC POPS XTREME SRN SXNS THRS...ELSW CHC POPS MAINLY AFTN AS A SHRT/WV SWINGS SEWD AROUND BASE OF UPPER LOW IN SE CANADA ALNG WITH CAA ALOFT. HI PRES BUILDS IN LTR THRS NGT AND PLASNT FRIDAY BFR NEXT SYSTEM AFFECTS AREA ON SAT. OVNGT TEMPS SRN SXNS MAY END UP IN LW/MID 60S IF FRONT SLOWLY CRAWLS TO PA/WV BORDER BY THRS MRNG. ALSO FOG THERE LTE TNGT. .PBZ... MD...NONE. OH...NONE. PA...NONE. WV...NONE.
The national radar mosaic for the moment the first event began.
3 thunderstorm wind, 1 flash flood. Local standard time, as filed.
Strong thunderstorm rains produced minor roadway flooding on SR 18. Minor flooding was also reported along SR 21 near Graysville.
Thunderstorm winds downed a few trees.
Thunderstorm winds blew the roof from a building, peeled some aluminum siding from another, and downed several trees along SR 837.
Thunderstorm winds downed a few trees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2001Every state in 2001This day in weather historyWarnings in Pennsylvania, July 2001
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: 5262377, 5262378, 5262379, 5262380.