Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 39, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at May 1, 2017, 8:29 PM EDT for 4 counties in Pennsylvania. It was in force for 46 min. 3 reports 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
- May 1, 2017, 8:29 PM EDT (00:29 UTC)
- Expired
- May 1, 2017, 9:15 PM EDT
- In force
- 46 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bedford County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA
The radar
The State College radar (KCCX), 85 km from the middle of the area, began a volume at 00:31 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 |
|---|---|---|---|
| May 1, 8:35 PM EDT | TSTM WND DMG | Coalmont, PA | TREES DOWN ON WIRES |
| May 1, 8:46 PM EDT | TSTM WND DMG | 3 Nw Rockhill, PA | LARGE TREE DOWN. |
| May 1, 9:05 PM EDT | TSTM WND DMG | Doylesburg, PA | TREES DOWN ON WIRES |
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 |
|---|---|---|---|
| May 1, 2:12 PM EDT | Tornado Watch | SPC | 8 hr |
| May 1, 5:54 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.5 hours before the alert went out and 141 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
- 403 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 913 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 195 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 1.9
The text
As transmitted.
573
WUUS51 KCTP 020029
SVRCTP
PAC009-055-057-061-020115-
/O.NEW.KCTP.SV.W.0039.170502T0029Z-170502T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
829 PM EDT MON MAY 1 2017
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Southeastern Bedford County in south central Pennsylvania...
Southern Huntingdon County in central Pennsylvania...
Northeastern Franklin County in south central Pennsylvania...
Fulton County in south central Pennsylvania...
* Until 915 PM EDT
* At 828 PM EDT, severe thunderstorms were located along a line
extending from near Waterfall to Locust Grove, moving northeast at
45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Breezewood, Waterfall, Dudley, Locust Grove, Harrisonville, Willow
Hill, Fannettsburg, Saluvia, Roxbury and Rockhill Furnace.
This includes the following Interstates...
Interstate 70 from mile markers 147 to 159.
The Pennsylvania Turnpike from mile markers 157 to 201.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A tornado watch remains in effect until 1000 PM EDT for south central
and central Pennsylvania.
LAT...LON 3983 7829 4004 7836 4019 7828 4037 7786
4036 7782 4038 7775 4027 7771 4027 7770
4029 7767 4022 7765 4023 7761 4018 7762
4013 7759 4012 7756 4007 7754
TIME...MOT...LOC 0028Z 237DEG 40KT 4017 7812 3985 7827
HAIL...<.75IN
WIND...60MPH
$$
Lambert1 follow-up statement
229
WWUS51 KCTP 020045
SVSCTP
Severe Weather Statement
National Weather Service State College PA
845 PM EDT MON MAY 1 2017
PAC009-020054-
/O.CAN.KCTP.SV.W.0039.000000T0000Z-170502T0115Z/
Bedford PA-
845 PM EDT MON MAY 1 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BEDFORD COUNTY IS
CANCELLED...
The storms which prompted the warning have moved northeast and out
of Bedford county. Therefore the warning has been cancelled.
A tornado watch remains in effect until 1000 PM EDT for south central
and central Pennsylvania.
A severe thunderstorm watch remains in effect until 1100 PM EDT for
south central Pennsylvania.
LAT...LON 3997 7806 4007 7815 4025 7809 4037 7786
4036 7782 4038 7775 4027 7771 4027 7770
4029 7767 4022 7765 4023 7761 4018 7762
4013 7759 4012 7756 4007 7754
TIME...MOT...LOC 0044Z 237DEG 40KT 4024 7798 3992 7813
$$
PAC055-057-061-020115-
/O.CON.KCTP.SV.W.0039.000000T0000Z-170502T0115Z/
Huntingdon PA-Franklin PA-Fulton PA-
845 PM EDT MON MAY 1 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR SOUTHEASTERN HUNTINGDON...NORTHEASTERN FRANKLIN AND NORTHEASTERN
FULTON COUNTIES...
At 844 PM EDT, severe thunderstorms were located along a line
extending from near Rockhill Furnace to near Needmore, moving
northeast at 45 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Waterfall, Roxbury, Rockhill Furnace, Doylesburg, Upper Strasburg,
Harrisonville, Willow Hill, Fort Littleton, Sideling Hill Rest Area
and Fannettsburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
A tornado watch remains in effect until 1000 PM EDT for south central
and central Pennsylvania.
LAT...LON 3997 7806 4007 7815 4025 7809 4037 7786
4036 7782 4038 7775 4027 7771 4027 7770
4029 7767 4022 7765 4023 7761 4018 7762
4013 7759 4012 7756 4007 7754
TIME...MOT...LOC 0044Z 237DEG 40KT 4024 7798 3992 7813
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
$$
LambertThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 8:01 PM EDT | Special Weather Statement | CTP | Bedford, Fulton, Huntingdon | 44 min |
| May 1, 8:18 PM EDT | Special Weather Statement | CTP | Montour | 27 min |
| May 1, 8:39 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Sullivan | 36 min |
| May 1, 8:47 PM EDT | Tornado Warning | CTP | Franklin, Fulton, Huntingdon | 26 min |
| May 1, 8:55 PM EDT | Areal Flood Advisory | CTP | Columbia, Lycoming, Montour, Northumberland, Sullivan, Union | 3 hr |
| May 1, 9:02 PM EDT | Special Weather Statement | CTP | Union | 28 min |
| May 1, 9:10 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Perry | 54 min |
| May 1, 9:55 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland, Snyder | 80 min |
| May 1, 10:06 PM EDT | Areal Flood Advisory | CTP | Columbia, Lycoming, Montour, Northumberland, Snyder, Sullivan and 1 more | 3 hr |
| May 1, 10:55 PM EDT | Special Weather Statement | CTP | Juniata, Perry, Snyder | 65 min |
| May 1, 11:55 PM EDT | Special Weather Statement | CTP | Columbia, Dauphin, Northumberland, Perry, Schuylkill | 80 min |
| May 2, 4:35 AM EDT | Wind Advisory | CTP | Bedford, Blair, Cambria, Cameron, Clearfield, Elk and 3 more | 14 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2017Every severe thunderstorm warning in 2017
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.