Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 21, NWS State College, PA

May 27, 20144 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 27, 2014, 4:25 PM EDT for 4 counties in Pennsylvania. It was in force for 65 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: May 27, 2014, 4:25 PM EDT (20:25 UTC)
Expired: May 27, 2014, 5:30 PM EDT
In force: 65 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Lancaster County, PA, Lebanon County, PA, Schuylkill County, PA, York County, PA

The radar

The Philadelphia radar (KDIX), 152 km from the middle of the area, began a volume at 20:27 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
May 27, 4:35 PM EDT	TSTM WND GST 61	1 E Myerstown, PA
May 27, 4:36 PM EDT	TSTM WND DMG	2 Nw Manheim, PA	TREES AND WIRES REPORTED DOWN ALONG ROUTE 72.
May 27, 4:40 PM EDT	TSTM WND GST 60	1 S Myerstown, PA	SPOTTER ESTIMATED SPEED
May 27, 4:40 PM EDT	TSTM WND GST 60	1 S Myerstown, PA	SPOTTER ESTIMATED SPEED

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 27, 2:13 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.4 hours before the alert went out and 73 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1885 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

929 
WUUS51 KCTP 272025
SVRCTP
PAC071-075-107-133-272130-
/O.NEW.KCTP.SV.W.0021.140527T2025Z-140527T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
425 PM EDT TUE MAY 27 2014

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LANCASTER COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  SOUTH CENTRAL SCHUYLKILL COUNTY IN CENTRAL PENNSYLVANIA...
  CENTRAL YORK COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  LEBANON COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 530 PM EDT

* AT 425 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING
  WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR FREDERICKSBURG TO NEAR MARIETTA...AND MOVING
  EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LANCASTER...LEBANON...EPHRATA...ELIZABETHTOWN...COLUMBIA...
  LITITZ...MILLERSVILLE...WILLOW STREET...MOUNT JOY...NEW HOLLAND...
  MANHEIM...ANNVILLE...EAST PETERSBURG...CORNWALL...AKRON...
  MYERSTOWN...LEOLA...PARADISE...SALUNGA-LANDISVILLE AND DENVER.

THIS INCLUDES THE FOLLOWING INTERSTATES...
 THE PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 259 AND 295.
 INTERSTATE 78 BETWEEN MILE MARKERS 0 AND 8.
 INTERSTATE 81 BETWEEN MILE MARKERS 88 AND 92...AND BETWEEN MILE
MARKERS 94 AND 100.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND DESTRUCTIVE HAIL. FOR
YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS.

&&

LAT...LON 4000 7662 4056 7651 4052 7628 4052 7631
      4049 7644 4014 7588 4011 7594 4003 7594
      3995 7600 3988 7599 3985 7602 3983 7602
      3979 7605
TIME...MOT...LOC 2025Z 290DEG 28KT 4048 7645 4006 7654 

$$

LA CORTE

1 follow-up statement

565 
WWUS51 KCTP 272115
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
515 PM EDT TUE MAY 27 2014

PAC075-107-133-272124-
/O.CAN.KCTP.SV.W.0021.000000T0000Z-140527T2130Z/
SCHUYLKILL PA-YORK PA-LEBANON PA-

515 PM EDT TUE MAY 27 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SCHUYLKILL...
CENTRAL YORK AND LEBANON COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA...THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 3979 7605 3983 7615 4026 7607 4014 7588
      4011 7594 4003 7594 3995 7600 3988 7599
      3985 7602 3983 7602
TIME...MOT...LOC 2114Z 292DEG 29KT 4023 7595 3981 7609 

$$

PAC071-272130-
/O.CON.KCTP.SV.W.0021.000000T0000Z-140527T2130Z/
LANCASTER PA-
515 PM EDT TUE MAY 27 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR EASTERN LANCASTER COUNTY...

AT 514 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR NEW MORGAN TO NEAR GLEN ROY...MOVING EAST AT 35
MPH.

LOCATIONS IMPACTED INCLUDE...
NEW HOLLAND...PARADISE...GAP...ADAMSTOWN...TERRE HILL...CHURCHTOWN...
BOWMANSVILLE...INTERCOURSE...CHRISTIANA...FIVEPOINTVILLE...BLUE
BALL...GEORGETOWN...GOODVILLE...KIRKWOOD AND WHITE HORSE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY 
LEAD TO FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3979 7605 3983 7615 4026 7607 4014 7588
      4011 7594 4003 7594 3995 7600 3988 7599
      3985 7602 3983 7602
TIME...MOT...LOC 2114Z 292DEG 29KT 4023 7595 3981 7609 

$$

LA CORTE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 1:34 PM EDT	Special Weather Statement	CTP	Clinton	26 min
May 27, 1:42 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter, Tioga	63 min
May 27, 1:56 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Clearfield, Huntingdon, Mifflin	64 min
May 27, 2:30 PM EDT	Special Weather Statement	CTP	Adams	60 min
May 27, 2:54 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Huntingdon, Juniata, Lycoming, Mifflin and 5 more	66 min
May 27, 2:56 PM EDT	Areal Flood Advisory	CTP	Potter, Tioga	3 hr
May 27, 3:04 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan	56 min
May 27, 3:33 PM EDT	Special Weather Statement	CTP	Dauphin, Perry, Snyder	27 min
May 27, 3:37 PM EDT	Special Weather Statement	CTP	Franklin, Fulton	23 min
May 27, 3:41 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Juniata, Lebanon, Northumberland, Perry and 1 more	64 min
May 27, 4:07 PM EDT	Special Weather Statement	CTP	Lancaster	23 min
May 27, 4:34 PM EDT	Areal Flood Advisory	CTP	Dauphin, Lancaster, Lebanon	116 min
May 27, 4:36 PM EDT	Special Weather Statement	CTP	Somerset	39 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2014 Every severe thunderstorm warning in 2014

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.