Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS State College, PA

May 26, 2021Dauphin County, Northumberland County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 26, 2021, 8:29 PM EDT for Dauphin County, Northumberland County, Pennsylvania. It was in force for 32 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: May 26, 2021, 8:29 PM EDT (00:29 UTC)
Expired: May 26, 2021, 9:01 PM EDT
In force: 32 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Dauphin County, PA, Northumberland County, PA

The radar

The State College radar (KCCX), 109 km from the middle of the area, began a volume at 00:33 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, 8:50 PM EDT	TSTM WND DMG	1 Wnw Gratz, PA	BRANCHES DOWN ON SPECKTOWN RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.5 hours before the alert went out and 188 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: 1316 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1697 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

782 
WUUS51 KCTP 270029
SVRCTP
PAC043-097-270115-
/O.NEW.KCTP.SV.W.0017.210527T0029Z-210527T0115Z/

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

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Southwestern Northumberland County in central Pennsylvania...
  Northern Dauphin County in south central Pennsylvania...

* Until 915 PM EDT.

* At 829 PM EDT, a severe thunderstorm was located near Millersburg,
  moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Millersburg, Lykens, Elizabethville, Williamstown, Port Trevorton,
  Klingerstown, Urban, Wiconisco, Gratz, Dalmatia, Berrysburg, Pillow
  and Enders.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4048 7668 4046 7668 4052 7698 4054 7698
      4057 7699 4059 7696 4064 7694 4069 7688
      4068 7666 4067 7669 4066 7670 4056 7654
TIME...MOT...LOC 0029Z 278DEG 37KT 4060 7693 

HAIL...<.75IN
WIND...60MPH
 
$$

KF

1 follow-up statement

624 
WWUS51 KCTP 270101
SVSCTP

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

PAC043-097-270110-
/O.CAN.KCTP.SV.W.0017.000000T0000Z-210527T0115Z/
Northumberland PA-Dauphin PA-
901 PM EDT Wed May 26 2021

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

LAT...LON 4048 7668 4046 7668 4052 7698 4054 7698
      4057 7699 4059 7696 4064 7694 4069 7688
      4068 7666 4067 7669 4066 7670 4056 7654
TIME...MOT...LOC 0058Z 278DEG 37KT 4055 7650 

$$

KF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:04 PM EDT	Special Weather Statement	CTP	Snyder	26 min
May 26, 8:10 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Perry, Snyder	35 min
May 26, 8:47 PM EDT	Special Weather Statement	CTP	Schuylkill	28 min
May 26, 9:15 PM EDT	Special Weather Statement	CTP	Schuylkill	30 min
May 26, 9:26 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	34 min
May 26, 9:33 PM EDT	Special Weather Statement	CTP	Lancaster, York	42 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.