Alert archive / Pennsylvania / Tornado Warnings in 2018
Tornado Warning 7, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this tornado warning at Aug 21, 2018, 8:02 PM EDT for Jefferson County, Pennsylvania. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 21, 2018, 8:02 PM EDT (00:02 UTC)
- Expired
- Aug 21, 2018, 8:30 PM EDT
- In force
- 28 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Jefferson County, PA
The radar
The State College radar (KCCX), 73 km from the middle of the area, began a volume at 00:05 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 |
|---|---|---|---|
| Aug 21, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Pittsburgh, PA (KAGC), launched 00:00Z, 0.0 hours before the alert went out and 139 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
- 154 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 993 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
The text
As transmitted.
146
WFUS51 KPBZ 220002
TORPBZ
PAC065-220030-
/O.NEW.KPBZ.TO.W.0007.180822T0002Z-180822T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pittsburgh PA
802 PM EDT TUE AUG 21 2018
The National Weather Service in Pittsburgh has issued a
* Tornado Warning for...
East central Jefferson County in west central Pennsylvania...
* Until 830 PM EDT..
* At 801 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Reynoldsville, or 8 miles east of Brookville,
moving east at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
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 dangerous storm will be near...
Reynoldsville around 805 PM EDT.
Brockway around 825 PM EDT.
Other locations impacted by this tornadic thunderstorm include Falls
Creek and Sykesville.
This includes Interstate 80 in Pennsylvania between mile markers 83
and 96.
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 4120 7877 4113 7880 4105 7881 4105 7900
4117 7902 4127 7875 4126 7874 4123 7874
4123 7871 4120 7871
TIME...MOT...LOC 0001Z 253DEG 22KT 4112 7893
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
072 follow-up statements
660
WWUS51 KPBZ 220009
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
809 PM EDT TUE AUG 21 2018
PAC065-220030-
/O.CON.KPBZ.TO.W.0007.000000T0000Z-180822T0030Z/
Jefferson PA-
809 PM EDT TUE AUG 21 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM EDT FOR EAST
CENTRAL JEFFERSON COUNTY...
At 809 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Reynoldsville, or near DuBois, moving east at 25
mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Brockway around 825 PM EDT.
Other locations impacted by this tornadic thunderstorm include Falls
Creek and Sykesville.
This includes Interstate 80 in Pennsylvania between mile markers 87
and 96.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
&&
LAT...LON 4120 7877 4113 7880 4105 7881 4106 7897
4118 7896 4127 7875 4126 7874 4123 7874
4123 7871 4120 7871
TIME...MOT...LOC 0009Z 253DEG 22KT 4114 7886
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
07090
WWUS51 KPBZ 220021
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
821 PM EDT TUE AUG 21 2018
PAC065-220030-
/O.EXP.KPBZ.TO.W.0007.000000T0000Z-180822T0030Z/
Jefferson PA-
821 PM EDT TUE AUG 21 2018
...THE TORNADO WARNING FOR EAST CENTRAL JEFFERSON COUNTY WILL EXPIRE
AT 830 PM EDT...
The storm which prompted the warning has weakened below severe limits
and no longer appears capable of producing a tornado. Therefore, the
warning will be allowed to expire.
LAT...LON 4120 7877 4113 7880 4105 7881 4106 7897
4118 7896 4127 7875 4126 7874 4123 7874
4123 7871 4120 7871
TIME...MOT...LOC 0020Z 253DEG 22KT 4116 7878
$$
07The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 10:37 PM EDT | Areal Flood Advisory | PBZ | Jefferson | 2 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.