Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 217, NWS Pittsburgh, PA

August 2, 2019Indiana County, Jefferson County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Aug 2, 2019, 10:37 AM EDT for Indiana County, Jefferson County, Pennsylvania. It was in force for 38 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
Aug 2, 2019, 10:37 AM EDT (14:37 UTC)
Expired
Aug 2, 2019, 11:15 AM EDT
In force
38 min
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Indiana County, PA, Jefferson County, PA

The radar

The State College radar (KCCX), 87 km from the middle of the area, began a volume at 14:37 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, 2.6 hours before the alert went out and 104 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 2019-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 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 2019-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.1939Sfc1 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
36 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
1497 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
26 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 Aug 2, 10:23 AM EDT, 14 minutes earlier.

Area forecast discussion, Aug 2, 10:23 AM EDT, 14 minutes before
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Hazardous weather outlook, Aug 2, 3:14 AM EDT, 7 hours 23 minutes before
Hazardous Weather Outlook
National Weather Service Pittsburgh PA
314 AM EDT Fri Aug 2 2019

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029-031-073>076-WVZ001>004-012-021-509>514-030715-
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-Ridges of Eastern Monongalia and Northwestern Preston-
Preston-Eastern Preston-Western Tucker-Eastern Tucker-
314 AM EDT Fri Aug 2 2019

This Hazardous Weather Outlook is for western Maryland, east
central Ohio, northwest Pennsylvania, southwest Pennsylvania, west
central Pennsylvania, western 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...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.

In the hours before

Special weather statement, Aug 2, 9:13 AM EDT, 1 hour 24 minutes before
Special Weather Statement
National Weather Service Pittsburgh PA
913 AM EDT Fri Aug 2 2019

PAZ023-073-074-021345-
Westmoreland Ridges-Westmoreland-Indiana-
913 AM EDT Fri Aug 2 2019

...A STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL...GUSTY WIND
AND HEAVY RAIN WILL AFFECT SOUTHERN INDIANA AND EAST CENTRAL
WESTMORELAND COUNTIES...

At 912 AM EDT, a strong thunderstorm was located near Black Lick, or
near Homer City, moving east at 15 mph.

Wind gusts up to 45 mph and small hail are possible with this storm.

Locations impacted include...
Indiana...                        Homer City...
Blairsville...                    Black Lick...
Clymer...                         New Florence...
Chevy Chase Heights...            Seward...
Bolivar...                        Cherry Tree...
Armagh...                         Lucerne Mines...

Torrential rainfall also is occurring with this storm and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4072 7881 4060 7886 4040 7897 4035 7925
      4055 7938 4077 7881 4072 7880
TIME...MOT...LOC 1312Z 250DEG 13KT 4051 7921

CL
Special weather statement, Aug 2, 10:13 AM EDT, 24 minutes before
Special Weather Statement
National Weather Service Pittsburgh PA
1013 AM EDT Fri Aug 2 2019

PAZ023-021500-
Indiana-
1013 AM EDT Fri Aug 2 2019

...A STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL AND HEAVY
RAIN WILL AFFECT NORTHEASTERN INDIANA COUNTY...

At 1012 AM EDT, a strong thunderstorm was located 7 miles west of
Northern Cambria, or 13 miles east of Indiana. the storm is nearly
stationary.

Small hail is possible with this storm.

Locations impacted include...
Clymer...                         Marion Center...
Cherry Tree...                    Glen Campbell...
Dixonville...                     Commodore...

Torrential rainfall also is occurring with this storm and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4072 7881 4061 7886 4068 7909 4087 7908
      4086 7881 4072 7880
TIME...MOT...LOC 1412Z 187DEG 4KT 4069 7892
Special weather statement, Aug 2, 10:21 AM EDT, 16 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 9:13 AM EDTSpecial Weather StatementPBZIndiana32 min
Aug 2, 10:13 AM EDTSpecial Weather StatementPBZIndiana47 min
Aug 2, 10:21 AM EDTSpecial Weather StatementPBZJefferson54 min
Aug 2, 11:22 AM EDTAreal Flood AdvisoryPBZJefferson3 hr
Aug 2, 1:09 PM EDTSpecial Weather StatementPBZIndiana36 min
Aug 2, 1:42 PM EDTSpecial Weather StatementPBZWestmoreland33 min
Aug 2, 1:50 PM EDTSpecial Weather StatementPBZIndiana40 min
Aug 2, 2:04 PM EDTAreal Flood AdvisoryPBZIndiana, Westmoreland119 min
Aug 2, 2:08 PM EDTSpecial Weather StatementPBZIndiana37 min
Aug 2, 2:14 PM EDTAreal Flood AdvisoryPBZWestmoreland3 hr
Aug 2, 2:29 PM EDTSpecial Weather StatementPBZSomerset31 min
Aug 2, 2:41 PM EDTAreal Flood AdvisoryPBZIndiana82 min
Aug 2, 2:45 PM EDTSevere Thunderstorm WarningPBZFayette30 min
Aug 2, 3:02 PM EDTAreal Flood AdvisoryPBZFayette, Westmoreland3 hr
Aug 2, 3:06 PM EDTSpecial Weather StatementPBZWestmoreland39 min
Aug 2, 3:16 PM EDTFlash Flood WarningPBZFayette, Westmoreland3 hr
Aug 2, 3:21 PM EDTSevere Thunderstorm WarningPBZWestmoreland39 min
Aug 2, 3:46 PM EDTSevere Thunderstorm WarningPBZGreene, Washington29 min
Aug 2, 4:14 PM EDTAreal Flood AdvisoryPBZAllegheny, Washington, Westmoreland2 hr
Aug 2, 4:31 PM EDTSevere Thunderstorm WarningPBZAllegheny, Fayette, Washington, Westmoreland44 min
Aug 2, 4:34 PM EDTFlash Flood WarningPBZAllegheny, Washington, Westmoreland106 min
Aug 2, 4:47 PM EDTSpecial Weather StatementPBZWashington28 min
Aug 2, 4:55 PM EDTSpecial Weather StatementPBZAllegheny50 min
Aug 2, 5:13 PM EDTSevere Thunderstorm WarningPBZWashington47 min
Aug 2, 5:16 PM EDTAreal Flood AdvisoryPBZAllegheny, Armstrong, Westmoreland64 min
Aug 2, 5:47 PM EDTAreal Flood AdvisoryPBZWashington91 min
Aug 2, 5:48 PM EDTSpecial Weather StatementPBZButler42 min
Aug 2, 5:55 PM EDTSpecial Weather StatementPBZWashington50 min
Aug 2, 6:26 PM EDTSpecial Weather StatementPBZFayette34 min
Aug 2, 6:33 PM EDTSevere Thunderstorm WarningPBZFayette27 min
Aug 2, 6:45 PM EDTFlash Flood WarningPBZFayette, Greene69 min
Aug 2, 1:50 PM EDTFlash Flood WarningPBZPreston88 min
Aug 2, 4:50 PM EDTSpecial Weather StatementPBZPreston40 min
Aug 2, 5:52 PM EDTAreal Flood AdvisoryPBZMonongalia, Preston3 hr
Aug 2, 6:13 PM EDTSpecial Weather StatementPBZMonongalia32 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019Every severe thunderstorm warning in 2019

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.