Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 66, NWS State College, PA

June 30, 2021Franklin County, Fulton County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 30, 2021, 5:24 PM EDT for Franklin County, Fulton County, Pennsylvania. It was in force for 48 min. 4 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: Jun 30, 2021, 5:24 PM EDT (21:24 UTC)
Expired: Jun 30, 2021, 6:12 PM EDT
In force: 48 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Franklin County, PA, Fulton County, PA

The radar

The State College radar (KCCX), 114 km from the middle of the area, began a volume at 21:27 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
Jun 30, 5:38 PM EDT	TSTM WND DMG	4 S Fort Littleton, PA	MULTIPLE TREES DOWN.
Jun 30, 5:40 PM EDT	TSTM WND DMG	1 Ene Mcconnellsburg, PA	TREES DOWN AND WIRES ON W WOOD ST.
Jun 30, 5:42 PM EDT	TSTM WND DMG	5 Nw Fort Loudon, PA	TREES DOWN.
Jun 30, 5:45 PM EDT	TSTM WND DMG	4 S Fort Littleton, PA	TREES DOWN ON TURKEY RD.

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
Jun 30, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 30, 4:51 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.4 hours before the alert went out and 121 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 40 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1553 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

120 
WUUS51 KCTP 302124
SVRCTP
PAC055-057-302230-
/O.NEW.KCTP.SV.W.0066.210630T2124Z-210630T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
524 PM EDT Wed Jun 30 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Southwestern Franklin County in south central Pennsylvania...
  Central Fulton County in south central Pennsylvania...

* Until 630 PM EDT.

* At 524 PM EDT, a severe thunderstorm was located near Locust Grove,
  moving east at 25 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  St. Thomas, Mercersburg, McConnellsburg, Harrisonville, Marion,
  Fort Loudon, Big Cove Tannery, Crystal Springs, Needmore, Saluvia,
  Locust Grove, Fannettsburg and Williamson.

This includes the following Interstates...
 Interstate 70 from mile markers 151 to 162.
 Interstate 81 from mile markers 9 to 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3985 7829 3998 7822 4008 7776 3984 7766
      3980 7827
TIME...MOT...LOC 2124Z 255DEG 20KT 3989 7820 

HAIL...0.75IN
WIND...60MPH
 
$$

Travis

2 follow-up statements

147 
WWUS51 KCTP 302144
SVSCTP

Severe Weather Statement
National Weather Service State College PA
544 PM EDT Wed Jun 30 2021

PAC055-057-302230-
/O.CON.KCTP.SV.W.0066.000000T0000Z-210630T2230Z/
Franklin PA-Fulton PA-
544 PM EDT Wed Jun 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHWESTERN FRANKLIN AND SOUTHEASTERN FULTON COUNTIES...

At 543 PM EDT, a severe thunderstorm was located over McConnellsburg,
moving east at 35 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
St. Thomas, Mercersburg, McConnellsburg, Harrisonville, Marion, Fort
Loudon, Big Cove Tannery, Fannettsburg and Williamson.

This includes Interstate 81 from mile markers 9 to 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3981 7808 4001 7810 4008 7776 3984 7766
TIME...MOT...LOC 2143Z 251DEG 32KT 3995 7796 

HAIL...0.75IN
WIND...60MPH
 
$$

Travis

988 
WWUS51 KCTP 302212
SVSCTP

Severe Weather Statement
National Weather Service State College PA
612 PM EDT Wed Jun 30 2021

PAC055-057-302221-
/O.CAN.KCTP.SV.W.0066.000000T0000Z-210630T2230Z/
Franklin PA-Fulton PA-
612 PM EDT Wed Jun 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN FRANKLIN AND
SOUTHEASTERN FULTON COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
south central Pennsylvania. A Severe Thunderstorm Watch also remains
in effect until 1000 PM EDT for south central Pennsylvania.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
State College PA.

LAT...LON 3981 7808 4001 7810 4008 7776 3984 7766
TIME...MOT...LOC 2209Z 255DEG 20KT 3999 7776 

$$

Travis

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 8:56 PM EDT	Heat Advisory	CTP	Columbia, Dauphin, Lancaster, Lebanon, Lycoming, Montour and 5 more	22 hr
Jun 29, 9:10 PM EDT	Special Weather Statement	CTP	Centre	20 min
Jun 29, 9:16 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	89 min
Jun 29, 9:27 PM EDT	Special Weather Statement	CTP	Centre	18 min
Jun 29, 9:30 PM EDT	Severe Thunderstorm Warning	CTP	Centre	45 min
Jun 29, 10:17 PM EDT	Special Weather Statement	CTP	Sullivan	28 min
Jun 29, 10:27 PM EDT	Special Weather Statement	CTP	Potter	33 min
Jun 29, 10:42 PM EDT	Severe Thunderstorm Warning	CTP	Potter, Tioga	63 min
Jun 29, 10:59 PM EDT	Special Weather Statement	CTP	Lycoming	31 min
Jun 29, 11:23 PM EDT	Special Weather Statement	CTP	Sullivan	22 min
Jun 29, 11:38 PM EDT	Special Weather Statement	CTP	Tioga	67 min
Jun 29, 11:39 PM EDT	Special Weather Statement	CTP	Sullivan	66 min
Jun 30, 6:59 AM EDT	Special Weather Statement	CTP	McKean	46 min
Jun 30, 1:13 PM EDT	Special Weather Statement	CTP	Warren	47 min
Jun 30, 1:46 PM EDT	Special Weather Statement	CTP	Clinton	29 min
Jun 30, 1:59 PM EDT	Special Weather Statement	CTP	McKean	46 min
Jun 30, 2:14 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	50 min
Jun 30, 2:25 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	28 min
Jun 30, 3:15 PM EDT	Special Weather Statement	CTP	Cambria	45 min
Jun 30, 3:24 PM EDT	Special Weather Statement	CTP	Centre	36 min
Jun 30, 3:46 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Montour, Northumberland, Snyder, Union	44 min
Jun 30, 3:59 PM EDT	Special Weather Statement	CTP	Somerset	46 min
Jun 30, 4:22 PM EDT	Special Weather Statement	CTP	Juniata	38 min
Jun 30, 4:42 PM EDT	Special Weather Statement	CTP	Columbia, Montour	48 min
Jun 30, 5:05 PM EDT	Special Weather Statement	CTP	Fulton	40 min
Jun 30, 6:10 PM EDT	Special Weather Statement	CTP	Cumberland	35 min
Jun 30, 6:27 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland	48 min
Jun 30, 7:00 PM EDT	Special Weather Statement	CTP	Dauphin	15 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021 Every severe thunderstorm warning in 2021

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.