Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 9, NWS State College, PA

May 26, 2021Adams County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 26, 2021, 3:35 PM EDT for Adams County, Pennsylvania. It was in force for 44 min. 2 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 26, 2021, 3:35 PM EDT (19:35 UTC)
Expired: May 26, 2021, 4:19 PM EDT
In force: 44 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Adams County, PA

The radar

The Sterling radar (KLWX), 106 km from the middle of the area, began a volume at 19:38 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 26, 3:47 PM EDT	TSTM WND DMG	3 Sw Gettysburg, PA	TREES DOWN AND PEA-SIZED HAIL NEAR MILLERSTOWN ROAD AND BLACK HORSE TAVERN ROAD.
May 26, 3:50 PM EDT	TSTM WND DMG	3 W New Oxford, PA	TREES AND WIRES DOWN ON SWIFT RUN ROAD WEST OF NEW OXFORD.

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 26, 12:59 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.6 hours before the alert went out and 107 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: 478 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 922 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

391 
WUUS51 KCTP 261935
SVRCTP
PAC001-262030-
/O.NEW.KCTP.SV.W.0009.210526T1935Z-210526T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
335 PM EDT Wed May 26 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Adams County in south central Pennsylvania...

* Until 430 PM EDT.

* At 335 PM EDT, a severe thunderstorm was located near Carroll
  Valley, moving northeast at 45 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to trees, roofs, and siding.

* Locations impacted include...
  Hanover, Gettysburg, Hampton, Littlestown, Carroll Valley,
  McSherrystown, Lake Meade, Bonneauville, New Oxford, East Berlin,
  Lake Heritage, Cashtown, Aspers, Orrtanna, Biglerville,
  Abbottstown, Arendtsville, York Springs, Heidlersburg and
  Hunterstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3982 7746 3993 7732 4005 7708 4003 7707
      4002 7703 3994 7697 3992 7697 3989 7698
      3986 7696 3983 7700 3972 7700 3972 7746
TIME...MOT...LOC 1935Z 243DEG 37KT 3978 7732 

HAIL...1.00IN
WIND...60MPH
 
$$

Colbert

1 follow-up statement

487 
WWUS51 KCTP 262019
SVSCTP

Severe Weather Statement
National Weather Service State College PA
419 PM EDT Wed May 26 2021

PAC001-262029-
/O.CAN.KCTP.SV.W.0009.000000T0000Z-210526T2030Z/
Adams PA-
419 PM EDT Wed May 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR ADAMS COUNTY 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.

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 3982 7746 3993 7732 4005 7708 4003 7707
      4002 7703 3994 7697 3992 7697 3989 7698
      3986 7696 3983 7700 3972 7700 3972 7746
TIME...MOT...LOC 2018Z 243DEG 37KT 3998 7679 

$$

Colbert

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 12:38 PM EDT	Special Weather Statement	CTP	Cambria	52 min
May 26, 1:23 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	41 min
May 26, 2:00 PM EDT	Special Weather Statement	CTP	Juniata	45 min
May 26, 2:07 PM EDT	Special Weather Statement	CTP	Franklin	23 min
May 26, 2:11 PM EDT	Special Weather Statement	CTP	Mifflin	49 min
May 26, 2:16 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Perry, Snyder	44 min
May 26, 2:31 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	39 min
May 26, 2:33 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Lebanon, Northumberland, Perry, Schuylkill and 1 more	57 min
May 26, 2:42 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Perry	50 min
May 26, 2:46 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Snyder	20 min
May 26, 3:09 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Perry	51 min
May 26, 3:23 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	82 min
May 26, 3:51 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	54 min
May 26, 4:03 PM EDT	Special Weather Statement	CTP	Lancaster, York	27 min
May 26, 4:37 PM EDT	Special Weather Statement	CTP	Lancaster	23 min
May 26, 4:47 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	43 min
May 26, 5:00 PM EDT	Special Weather Statement	CTP	Adams	30 min
May 26, 5:02 PM EDT	Special Weather Statement	CTP	Lancaster	28 min
May 26, 5:17 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	43 min
May 26, 5:29 PM EDT	Special Weather Statement	CTP	Lancaster	16 min
May 26, 5:37 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	23 min
May 26, 6:13 PM EDT	Special Weather Statement	CTP	Cambria	32 min
May 26, 6:30 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	15 min
May 26, 6:35 PM EDT	Special Weather Statement	CTP	Lebanon	25 min
May 26, 6:44 PM EDT	Severe Thunderstorm Warning	CTP	Blair	37 min
May 26, 7:09 PM EDT	Special Weather Statement	CTP	Huntingdon	36 min
May 26, 7:22 PM EDT	Special Weather Statement	CTP	Lancaster	23 min
May 26, 7:32 PM EDT	Special Weather Statement	CTP	Mifflin	13 min
May 26, 7:42 PM EDT	Special Weather Statement	CTP	Juniata, Mifflin	33 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.