Alert archive / Pennsylvania / Tornado Warnings in 2018
Tornado Warning 8, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this tornado warning at Sep 21, 2018, 6:53 PM EDT for Clarion County, Forest County, Venango County, Pennsylvania. It was in force for 37 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 21, 2018, 6:53 PM EDT (22:53 UTC)
- Expired
- Sep 21, 2018, 7:30 PM EDT
- In force
- 37 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Clarion County, PA, Forest County, PA, Venango County, PA
The radar
The Pittsburgh radar (KPBZ), 100 km from the middle of the area, began a volume at 22:55 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 21, 6:54 PM EDT | TSTM WND DMG | 1 Sw Twin Churchs, PA | MULTIPLE TREES DOWN IN SANDYCREEK TOWNSHIP |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 21, 4:32 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Pittsburgh, PA (KAGC), launched 12:00Z, 10.9 hours before the alert went out and 109 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
- 391 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 999 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.8
The text
As transmitted.
088
WFUS51 KPBZ 212253
TORPBZ
PAC031-053-121-212330-
/O.NEW.KPBZ.TO.W.0008.180921T2253Z-180921T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pittsburgh PA
653 PM EDT FRI SEP 21 2018
The National Weather Service in Pittsburgh has issued a
* Tornado Warning for...
Central Venango County in northwestern Pennsylvania...
Northwestern Clarion County in west central Pennsylvania...
Southwestern Forest County in northwestern Pennsylvania...
* Until 730 PM EDT..
* At 652 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Franklin, moving east at 50 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This tornadic thunderstorm will remain over mainly rural areas of
central Venango, northwestern Clarion and southwestern Forest
Counties, including the following locations... Fryburg, Kennerdell,
Seneca, Woodland Heights, Cranberry Township and Hasson Heights.
Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4125 7987 4141 7990 4150 7937 4126 7933
TIME...MOT...LOC 2252Z 261DEG 43KT 4134 7979
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
SKH2 follow-up statements
676
WWUS51 KPBZ 212300
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
700 PM EDT FRI SEP 21 2018
PAC031-053-121-212330-
/O.CON.KPBZ.TO.W.0008.000000T0000Z-180921T2330Z/
Venango PA-Clarion PA-Forest PA-
700 PM EDT FRI SEP 21 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
SOUTHEASTERN VENANGO...NORTHWESTERN CLARION AND SOUTHWESTERN FOREST
COUNTIES...
At 700 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Oil City, moving east at 50 mph.
HAZARD...Tornado.
SOURCE...Weather spotter reported a funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Oil City... Sugarcreek...
Tionesta... Seneca...
Woodland Heights... Fryburg...
Cranberry Township...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
&&
LAT...LON 4127 7977 4140 7980 4150 7937 4126 7933
TIME...MOT...LOC 2300Z 261DEG 43KT 4136 7966
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
SKH325
WWUS51 KPBZ 212309
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
709 PM EDT FRI SEP 21 2018
PAC031-053-121-212330-
/O.CON.KPBZ.TO.W.0008.000000T0000Z-180921T2330Z/
Venango PA-Clarion PA-Forest PA-
709 PM EDT FRI SEP 21 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR EAST
CENTRAL VENANGO...NORTHWESTERN CLARION AND SOUTHWESTERN FOREST
COUNTIES...
At 709 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Oil City, moving east at 30 mph.
HAZARD...Tornado.
SOURCE...Weather spotter reported a funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Oil City... Seneca...
Woodland Heights... Fryburg...
Cranberry Township...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
&&
LAT...LON 4130 7968 4142 7969 4150 7937 4126 7933
TIME...MOT...LOC 2309Z 261DEG 28KT 4136 7964
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
SKHThe office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 5:47 PM EDT | Special Weather Statement | PBZ | Mercer | 43 min |
| Sep 21, 6:32 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Forest, Lawrence, Mercer and 1 more | 43 min |
| Sep 21, 6:36 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence, Washington | 39 min |
| Sep 21, 7:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Lawrence | 51 min |
| Sep 21, 7:14 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Forest, Jefferson, Mercer and 1 more | 46 min |
| Sep 21, 7:44 PM EDT | Special Weather Statement | PBZ | Allegheny | 31 min |
| Sep 21, 7:58 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 47 min |
Nearby
Tornado Warnings in Pennsylvania, 2018Every tornado warning in 2018Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.