Alert archive / Ohio / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 127, NWS Pittsburgh, PA

July 18, 2012Carroll County, Harrison County, Tuscarawas County, Ohio

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 18, 2012, 5:16 PM EDT for Carroll County, Harrison County, Tuscarawas County, Ohio. It was in force for 44 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: Jul 18, 2012, 5:16 PM EDT (21:16 UTC)
Expired: Jul 18, 2012, 6:00 PM EDT
In force: 44 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

Counties Carroll County, OH, Harrison County, OH, Tuscarawas County, OH

The radar

The Pittsburgh radar (KPBZ), 85 km from the middle of the area, began a volume at 21:16 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 18, 1:16 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.3 hours before the alert went out and 95 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1936 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 1073 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 42 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 Jul 18, 3:12 PM EDT, 2 hours 4 minutes earlier.

Area forecast discussion, Jul 18, 3:12 PM EDT, 2 hours 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
312 PM EDT WED JUL 18 2012

.SYNOPSIS...
ONE MORE AFTERNOON ABOVE 90F THEN SLIGHTLY COOLER WEATHER IS
PREDICTED AS A COLD FRONT SLOWLY DROPS SOUTH FROM THE GREAT LAKES TONIGHT.
NEEDED RAINFALL SHOULD OCCUR ACROSS A LARGE AREA AHEAD OF THE
FRONT. UNSETTLED WEATHER WILL CONTINUE THROUGH THE BALANCE OF THE
WORK WEEK.

&&

.NEAR TERM /THROUGH THURSDAY/...
RADAR IS FILLING IN AND WILL CONTINUE TO DO SO THE BALANCE OF THE
AFTERNOON DUE TO STRONG INSTABILITY S OF A BAROCLINIC ZONE POISED
ALONG I-80 AS OF 17Z.  DETERMINISTIC MODELS SHOW MOST OF THE AREA
RECEIVING NEEDED RAINFALL HOWEVER A SEVERE AND HIGH WATER THREAT
REMAINS THROUGH THE EVENING HOURS.  VERTICAL WIND SHEAR REMAINS WEAK
BUT THE AMOUNT OF SB INSTABILITY SHOULD OFFSET THAT AND PRODUCE
PULSE STORMS.  WITH THE LOSS OF DAYTIME HEATING...MOST OF THE STORMS
WILL DISSIPATE...BUT WITH DWPTS STILL WELL INTO THE 60S AND LOWER
70S SOUTH OF I-70 CAN NOT RULE OUT AN ISOLATED STORM OVERNIGHT.

12Z NCEP SUITE CONTINUES TO SLOW DOWN SOUTHWARD PROGRESSION OF THE
COLD FRONT THURSDAY. HOWEVER MOST OF THE FINER RESOLUTION MODELS
DO NOT SHOW MUCH IN THE WAY OF PCPN...BUT ARE FAIRLY CONSISTENT ON
DROPPING A COMPLEX DOWN N OF THE FRONT DURING THE EVENING HOURS.
LOWERED POPS FOR MOST AREAS...WHILE BUMPING THEM UP IN NWRN
SECTIONS OF THE CWA FOR THE CLUSTER OF STORMS PREDICTED LATE
TOMORROW.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY NIGHT/...
CHALLENGING FORECAST TO START OFF THE SHORT TERM WITH A QUESTION
ON AERIAL EXTENT OF THUNDERSTORMS NORTH OF THE BOUNDARY DURING THE
EVENING HOURS. CHANCE POPS WERE CONTINUED TO ACCOUNT FOR
UNCERTAINTY IN THE N...WHILE LKLY POPS PERSIST S.

TREND CONTINUES OF THE BAROCLINIC ZONE TAKING ITS SWEET OLD TIME
MOVING SOUTH OF THE MASON DIXON LINE DESPITE STRONGER HEIGHT FALLS
AND STRONGER WINDS BEHIND IT. POPS WERE EXTENDED INTO FRIDAY FOR
NRN WV AND WRN MD TO ACCOUNT FOR THIS. CLOUD COVER WAS INCREASED
AS WELL DUE TO LAYER RH IN THE LOWEST 6KFT ABOVE 85%.

DRY WEATHER SHOULD TAKE HOLD SATURDAY.

MOSGUIDEBC USED FOR TEMPS.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
EXTENDED RANGE MODELS CONTINUE TO SHOW BENIGN WEATHER FOR THE LATTER OF
THE WEEKEND INTO EARLY NEXT WEEK. AREA WILL BE UNDER NW FLOW ALOFT
WHICH WILL KEEP THE HOT WEATHER /M-U 90S/ AWAY AND PROVIDE MORE
SEASONAL TEMPERATURES. ECMWF INDICATES AT RICH LOW LEVEL MOISTURE
SOUTH OF THE MASON DIXON LINE SUNDAY...WHICH COULD LEAD TO
SCATTERED SHOWERS AND STORMS.

TOWARD THE END OF THE FORECAST...H5 HEIGHTS BUILD ALLOWING THE MERCURY
TO CLIMB BACK AROUND 90F BY THE MIDDLE OF NEXT WEEK.

&&

.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
MEDIUM CONFIDENCE FORECAST DUE TO TIMING OF THUNDERSTORMS IMPACTING
TERMINALS FM 18-2Z.  IN ADDITION...WHERE IT RAINS TONIGHT A HIGHER
PROBABILITY OF IFR RESTRICTIONS EXISTS IN EITHER REDUCED VIS OR
STRATUS.  FKL AND DUJ SHOULD BE POSITIONED IN THE RELATIVELY COOLER
AIRMASS AND MAINTAIN ENOUGH WIND OVERNIGHT TO NEGATE IFR DEVELOPMENT.

THE COVERAGE OF STORMS WILL BE INCREASING THIS AFTERNOON AS A COLD
FRON DROPS SOUTH FROM NRN PARTS OF OH AND PA.  THIS WILL BE THE
FOCUS FOR ACTIVITY THROUGH DUSK.  PCPN WILL WANE WITH THE LOSS OF
HEATING YIELDING TO MAINLY VFR WX.

OUTLOOK...THURSDAY THROUGH SATURDAY...
NO WIDESPREAD IFR WEATHER IS PREDICTED.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.

&&

Hazardous weather outlook, Jul 18, 4:32 AM EDT, 12 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
432 AM EDT WED JUL 18 2012

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029-031-073>076-WVZ001>004-012-021>023-041-190845-
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-
432 AM EDT WED JUL 18 2012

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.

SLIGHT RISK FOR SEVERE THUNDERSTORMS TODAY. THE MAIN SEVERE THREAT
WILL BE LARGE HAIL AND DAMAGING WINDS. ADDITIONALLY, STORMS WILL
ALSO PROVIDE HEAVY DOWNPOURS AND FREQUENT CLOUD TO GROUND
LIGHTNING STRIKES.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

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.

In the hours before

Local storm report, Jul 18, 4:53 PM EDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
453 PM EDT WED JUL 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0214 PM     TSTM WND DMG     STEUBENVILLE            40.37N  80.65W
07/18/2012                   JEFFERSON          OH   BROADCAST MEDIA

            TREES DOWN

&&

EVENT NUMBER PBZ1200769

098

Local storm report, Jul 18, 4:54 PM EDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PITTSBURGH PA
454 PM EDT WED JUL 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0210 PM     TSTM WND DMG     4 E WEXFORD             40.63N  79.97W
07/18/2012                   ALLEGHENY          PA   BROADCAST MEDIA

            TREES DOWN IN NORTH PARK

&&

CORRECTED EVENT

EVENT NUMBER PBZ1200768

098

Local storm report, Jul 18, 5:03 PM EDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
503 PM EDT WED JUL 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0450 PM     HAIL             LITTLETON               39.70N  80.52W
07/18/2012  E1.00 INCH       WETZEL             WV   PUBLIC

&&

EVENT NUMBER PBZ1200771

098

Local storm report, Jul 18, 5:05 PM EDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PITTSBURGH PA
505 PM EDT WED JUL 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 PM     HAIL             LITTLETON               39.70N  80.52W
07/18/2012  E1.00 INCH       WETZEL             WV   PUBLIC

&&

CORRECTED EVENT TIME

EVENT NUMBER PBZ1200771

098

Local storm report, Jul 18, 5:13 PM EDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
513 PM EDT WED JUL 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0351 PM     FLASH FLOOD      PERRYOPOLIS             40.09N  79.75W
07/18/2012                   FAYETTE            PA   911 CALL CENTER

            ROADS CLOSED DUE TO HIGH WATER

&&

EVENT NUMBER PBZ1200772

098

Local storm report, Jul 18, 5:16 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
516 PM EDT WED JUL 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0359 PM     FLASH FLOOD      UNIONTOWN               39.90N  79.72W
07/18/2012                   FAYETTE            PA   911 CALL CENTER

            CONNELLSVILLE ST FLOODED

&&

EVENT NUMBER PBZ1200773

098

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 10:19 AM EDT	Special Weather Statement	PBZ	Armstrong, Clarion, Indiana, Jefferson	56 min
Jul 18, 11:56 AM EDT	Special Weather Statement	PBZ	Indiana	64 min
Jul 18, 1:00 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	60 min
Jul 18, 1:13 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	62 min
Jul 18, 1:25 PM EDT	Special Weather Statement	PBZ	Clarion, Jefferson	65 min
Jul 18, 1:42 PM EDT	Special Weather Statement	PBZ	Allegheny	63 min
Jul 18, 1:48 PM EDT	Areal Flood Advisory	PBZ	Beaver, Washington	6 hr
Jul 18, 1:54 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	66 min
Jul 18, 2:02 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	58 min
Jul 18, 2:10 PM EDT	Special Weather Statement	PBZ	Butler	50 min
Jul 18, 2:21 PM EDT	Areal Flood Advisory	PBZ	Allegheny	3 hr
Jul 18, 2:24 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Westmoreland	66 min
Jul 18, 2:48 PM EDT	Special Weather Statement	PBZ	Fayette	57 min
Jul 18, 2:56 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Fayette, Indiana, Westmoreland	64 min
Jul 18, 3:05 PM EDT	Areal Flood Advisory	PBZ	Fayette	3 hr
Jul 18, 3:22 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	38 min
Jul 18, 3:39 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	23 min
Jul 18, 3:42 PM EDT	Flash Flood Warning	PBZ	Fayette	2 hr
Jul 18, 3:50 PM EDT	Special Weather Statement	PBZ	Greene	40 min
Jul 18, 4:04 PM EDT	Special Weather Statement	PBZ	Lawrence	56 min
Jul 18, 4:16 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	29 min
Jul 18, 4:49 PM EDT	Areal Flood Advisory	PBZ	Greene	3 hr
Jul 18, 5:03 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	57 min
Jul 18, 5:09 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	51 min
Jul 18, 5:32 PM EDT	Flash Flood Warning	PBZ	Greene	4 hr
Jul 18, 5:41 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	24 min
Jul 18, 5:56 PM EDT	Special Weather Statement	PBZ	Greene	34 min
Jul 18, 1:20 PM EDT	Special Weather Statement	PBZ	Carroll, Jefferson	55 min
Jul 18, 2:12 PM EDT	Severe Thunderstorm Warning	PBZ	Harrison, Jefferson	44 min
Jul 18, 2:33 PM EDT	Special Weather Statement	PBZ	Coshocton, Tuscarawas	27 min
Jul 18, 3:05 PM EDT	Special Weather Statement	PBZ	Coshocton, Guernsey	40 min
Jul 18, 3:15 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana	60 min
Jul 18, 3:44 PM EDT	Special Weather Statement	PBZ	Harrison	31 min
Jul 18, 3:56 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Guernsey, Harrison	64 min
Jul 18, 4:15 PM EDT	Areal Flood Advisory	PBZ	Coshocton	3 hr
Jul 18, 4:19 PM EDT	Special Weather Statement	PBZ	Coshocton, Muskingum	56 min
Jul 18, 4:22 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Muskingum	68 min
Jul 18, 4:31 PM EDT	Areal Flood Advisory	PBZ	Guernsey, Muskingum, Noble	3 hr
Jul 18, 4:35 PM EDT	Special Weather Statement	PBZ	Jefferson	55 min
Jul 18, 4:55 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Guernsey, Harrison, Muskingum, Noble, Tuscarawas	50 min
Jul 18, 5:23 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Guernsey, Monroe, Noble	37 min
Jul 18, 6:00 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Harrison, Tuscarawas	45 min
Jul 18, 6:21 PM EDT	Areal Flood Advisory	PBZ	Carroll, Harrison, Tuscarawas	3 hr
Jul 18, 12:39 PM EDT	Special Weather Statement	PBZ	Hancock	36 min
Jul 18, 3:56 PM EDT	Special Weather Statement	PBZ	Marion, Monongalia, Preston, Wetzel	49 min
Jul 18, 4:47 PM EDT	Special Weather Statement	PBZ	Marshall	43 min
Jul 18, 7:00 PM EDT	Special Weather Statement	PBZ	Hancock	30 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2012 Every severe thunderstorm warning in 2012

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.