Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 26, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at May 12, 2018, 5:30 PM EDT for 5 counties in Pennsylvania. It was in force for 45 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
- May 12, 2018, 5:30 PM EDT (21:30 UTC)
- Expired
- May 12, 2018, 6:15 PM EDT
- In force
- 45 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Allegheny County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA
The radar
The Pittsburgh radar (KPBZ), 50 km from the middle of the area, began a volume at 21:33 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 |
|---|---|---|---|
| May 12, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Pittsburgh, PA (KAGC), launched 12:00Z, 9.5 hours before the alert went out and 33 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.
- Mixed-layer CAPE
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1381 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 312 m²/s²
- 0-3 km storm-relative helicity
- 354 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 12, 5:11 PM EDT, 19 minutes earlier.
Area forecast discussion, May 12, 5:11 PM EDT, 19 minutes before
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</html>Hazardous weather outlook, May 12, 3:27 AM EDT, 14 hours 3 minutes before
Hazardous Weather Outlook National Weather Service Pittsburgh PA 327 AM EDT Sat May 12 2018 MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029-031-073>076-WVZ001>004-012-021-509>514-130730- Garrett-Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson- Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest- Lawrence-Butler-Clarion-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- 327 AM EDT Sat May 12 2018 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. Thunderstorms are expected today. Some storms could be severe this afternoon and early evening, with large hail and damaging wind the main threats. Areas south of Interstate 80 have the highest chance of severe weather occurrence. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures.
In the hours before
Local storm report, May 12, 4:55 PM EDT, 35 minutes before
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</html>Local storm report, May 12, 4:59 PM EDT, 31 minutes before
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</html>Local storm report, May 12, 5:07 PM EDT, 23 minutes before
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</html>Local storm report, May 12, 5:19 PM EDT, 11 minutes before
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</html>Special weather statement, May 12, 5:19 PM EDT, 11 minutes before
Special Weather Statement
National Weather Service Pittsburgh PA
519 PM EDT SAT MAY 12 2018
PAZ074>076-122145-
Fayette Ridges-Westmoreland Ridges-Fayette-
519 PM EDT SAT MAY 12 2018
...A LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING GUSTY WIND
WILL AFFECT SOUTH CENTRAL WESTMORELAND AND EASTERN FAYETTE
COUNTIES...
At 519 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Scottdale to South Connellsville to
Uniontown. Movement was east at 50 mph.
Wind gusts up to 55 mph are possible with these storms.
Locations impacted include...
Uniontown... Connellsville...
South Connellsville... Seven Springs...
Dunbar... Everson...
Donegal... Chalkhill...
Champion... Ohiopyle...
Mill Run... Indian Head...
This includes Pennsylvania Turnpike between mile markers 88 and 99.
These storms may intensify, so monitor local radio or television
stations for additional information and possible warnings from the
National Weather Service.
LAT...LON 4011 7919 4012 7921 4010 7923 4009 7926
3990 7940 3985 7942 3982 7937 3979 7937
3989 7983 3997 7964 4009 7963 4009 7962
4008 7959 4010 7958 4011 7955 4012 7954
4014 7951 4013 7917
TIME...MOT...LOC 2119Z 279DEG 42KT 4007 7957 3997 7958 3992 7969The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 11:51 PM EDT | Special Weather Statement | PBZ | Armstrong | 24 min |
| May 12, 12:07 AM EDT | Special Weather Statement | PBZ | Indiana | 23 min |
| May 12, 2:45 PM EDT | Special Weather Statement | PBZ | Westmoreland | 45 min |
| May 12, 3:07 PM EDT | Special Weather Statement | PBZ | Allegheny | 38 min |
| May 12, 3:29 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 46 min |
| May 12, 3:54 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 51 min |
| May 12, 4:01 PM EDT | Special Weather Statement | PBZ | Greene | 29 min |
| May 12, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 32 min |
| May 12, 4:16 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 59 min |
| May 12, 4:27 PM EDT | Special Weather Statement | PBZ | Fayette | 48 min |
| May 12, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 38 min |
| May 12, 5:19 PM EDT | Special Weather Statement | PBZ | Fayette | 26 min |
| May 12, 5:34 PM EDT | Special Weather Statement | PBZ | Greene | 41 min |
| May 12, 6:15 PM EDT | Special Weather Statement | PBZ | Westmoreland | 15 min |
| May 12, 7:22 PM EDT | Areal Flood Advisory | PBZ | Fayette, Westmoreland | 3 hr |
| May 12, 3:27 PM EDT | Severe Thunderstorm Warning | PBZ | Harrison, Jefferson | 33 min |
| May 12, 3:48 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Guernsey | 42 min |
| May 12, 4:08 PM EDT | Special Weather Statement | PBZ | Columbiana | 22 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2018Every severe thunderstorm warning in 2018
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.