A weak shortwave riding along a stationary boundary helped to develop showers and thunderstorms during the day on the 18th. Some of these storms became strong to severe with afternoon heating.
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 weak shortwave riding along a stationary boundary helped to develop showers and thunderstorms during the day on the 18th. Some of these storms became strong to severe with afternoon heating.
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 18, 1:26 PM EST, 1 hour 39 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 226 PM EDT TUE JUN 18 2013 .SYNOPSIS... A COLD FRONT WILL SLOWLY MOVE SOUTHWARD THROUGH THE REGION TONIGHT...BRINGING DRIER CONDITIONS FOR THE REST OF THE WEEK. && .NEAR TERM /THROUGH WEDNESDAY/... THE COLD FRONT CONTINUES ITS SOUTHEASTWARD TROD EARLY THIS AFTERNOON AND CURRENTLY EXTENDS FROM ROUGHLY ZANESVILLE TO WHEELING TO PITTSBURGH. SHOWERS AND THUNDERSTORMS ARE FINALLY DEVELOPING ALONG THE FRONT...AND WILL LIKELY CONTINUE TO INCREASE IN COVERAGE/INTENSITY FOR THE NEXT COUPLE OF HOURS AS DIURNAL INSTABILITY MAXIMIZES AND THE SHEAR PROFILE BECOMES MOVE FAVORABLE. THE FRONT WILL SLOWLY EXIT THE SOUTHERN PORTIONS OF THE AREA TONIGHT...HOWEVER SOME DEGREE OF LOW LEVEL MOISTURE IS LIKELY TO REMAIN IN ITS WAKE DUE TO A POOR MIXING PROFILE IN THE LOW LEVELS BEHIND THE FRONT. AS SUCH...SOME FOG/STRATUS WILL BE POSSIBLE ACROSS THE SOUTHERN PORTIONS OF THE AREA WEDNESDAY MORNING. ONCE THE SUN RISES WEDNESDAY...THIS SHOULD QUICKLY MIX OUT. AFTER THAT POINT...DRIER LAYER RH PROFILES MEAN A RETURN TO MOSTLY SUNNY CONDITIONS BY AFTERNOON ACROSS THE AREA. BEHIND THE FRONT...COLD ADVECTION AT 850 MB BRINGS 850 MB TEMPERATURES DOWN TOWARD +10C WEDNESDAY AFTERNOON. WHILE THIS DOES REPRESENT ROUGHLY 2C OF COOLING FROM TODAY...A BETTER MIXED BOUNDARY LAYER AND LOW LEVEL LAPSE RATES CLOSER TO DRY ADIABATIC WILL LIKELY ACTUALLY MEAN A WARMER DAY BEHIND THE COLD FRONT ON WEDNESDAY. THE AREA AS A WHOLE LOOKS RATHER COMFORTABLE WITH LOWER DEWPOINTS THAN TODAY...HIGHS SHOULD GENERALLY RUN INTO THE 70S. THESE READINGS ARE AROUND HALF A DOZEN DEGREES BELOW NORMAL FOR THIS TIME OF THE YEAR. FRIES && .SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY NIGHT/... MODELS IN FAIR AGREEMENT WITH TIMING OF FRONT TO MOVE SOUTH OF THE FORECAST AREA BY TONIGHT. HIGH PRESSURE WILL SETTLE OVER THE REGION AND KEEP TEMPERATURES COOLER THAN NORMAL WEDNESDAY AND THURSDAY. WARMER THAN AVERAGE TEMPERATURES WILL FOLLOW ON FRIDAY AS WARM AIR ADVECTION FROM THE SOUTHWEST BEGINS TO PERSIST. && .LONG TERM /SATURDAY THROUGH TUESDAY/... WARM AND HUMID CONDITIONS ARE FORECAST INTO EARLY NXT WEEK AS BROAD RIDGE IS STILL PROJECTED TO BLD OVR THE SRN AND ERN CONUS. HAVE USED THE WARMER MOS GUIDANCE ONCE AGAIN FOR THE PD GIVEN CONSISTENT HT PROGS AS DEPICTED BY GFS AND ECMWF MDLS OVR THE PAST CPL OF DAYS. CHC/NR CLIMO POPS WERE ALSO INCLUDED THROUGH THE WEEKEND GIVEN THE INSTABILITY THAT WL ACCOMPANY THE WARMTH AND MSTR...WITH LIMITATIONS IMPOSED BY MID LVL CAPPING AND DEPENDENCY ON SHRTWV SPPRT ACRS THE NRN PERIPHERY OF THE RIDGE. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... SHOWERS AND THUNDERSTORMS HAVE BEGUN TO DEVELOP ALONG THE COLD FRONT THAT IS SLICING THROUGH THE AREA THIS AFTERNOON CURRENTLY FROM NEAR KZZV TO KHLG TO KAGC. AHEAD OF THIS BOUNDARY...COVERAGE OF TS SHOULD INCREASE FOR THE NEXT FEW HOURS. IN THUNDERSTORMS...CIGS/VIS WILL LIKELY DROP TO MVFR FOR A PERIOD. OTHERWISE...VFR CONDITIONS SHOULD RETURN BEHIND THE FRONT. SOME AREAS OF FOG WILL BE POSSIBLE IN THE OVERNIGHT/MORNING NEAR KZZV...KHLWG...AND ESPECIALLY KMGW DUE TO RECENT RAINFALL. SKIES SEEMS LIKELY TO CLEAR BY AFTERNOON WEDNESDAY. FRIES OUTLOOK.../WEDNESDAY THROUGH SATURDAY/... HIGH PRESSURE WILL BUILD INTO THE REGION. GENERAL VFR CONDITIONS ARE EXPECTED. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 413 AM EDT TUE JUN 18 2013 MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029-031-073>076-WVZ001>004-012-021>023-041-190815- GARRETT-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-WESTMORELAND-WESTMORELAND RIDGES- FAYETTE-FAYETTE RIDGES-HANCOCK-BROOKE-OHIO-MARSHALL-WETZEL-MARION- MONONGALIA-PRESTON-TUCKER- 413 AM EDT TUE JUN 18 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
158 PM EDT TUE JUN 18 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1245 PM FLOOD ROWLESBURG 39.35N 79.68W
06/18/2013 PRESTON WV 911 CALL CENTER
FLOODING ON RIVER ROAD
&&
EVENT NUMBER PBZ1302014
WOODRUM/MELZERSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
334 PM EDT TUE JUN 18 2013
PAZ029-075-182030-
FAYETTE PA-WASHINGTON PA-
334 PM EDT TUE JUN 18 2013
...STRONG THUNDERSTORMS WILL AFFECT CENTRAL WASHINGTON AND
NORTHWESTERN FAYETTE COUNTIES...
AT 332 PM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM AVELLA TO
3 MILES EAST OF WASHINGTON...MOVING EAST AT 20 MPH.
WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE
STORMS. HEAVY RAIN WILL POND WATER ON ROADS AND QUICKLY FILL DITCHES
AND SMALL STREAMS.
LOCATIONS IMPACTED INCLUDE...
WASHINGTON... AVELLA... ENTERPRISE...
BENTLEYVILLE... CANONSBURG... MCMURRAY...
BELLE VERNON... CHARLEROI...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. THE
WATER DEPTH MAY BE TOO GREAT FOR SAFE PASSAGE.
PLEASE REPORT SIGNIFICANT WEATHER BY CALLING...412-262-1988...POSTING
TO THE NWS PITTSBURGH FACEBOOK PAGE...OR USING TWITTER
@NWSPITTSBURGH.
LAT...LON 4007 7975 4020 8052 4036 8049 4028 8004
4016 7988 4016 7990 4013 7988 4013 7983
07The Pittsburgh radar (KPBZ), 44 km away, was scanning. The volume nearest the first event began at 20:06 UTC.
3 hail, 1 thunderstorm wind. Local standard time, as filed.
A state official reported trees down in South Strabane.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2013Every state in 2013This day in weather historyWarnings in Pennsylvania, June 2013
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: 460506, 460502, 460503, 460504.