Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 117, NWS State College, PA

June 30, 2015Lancaster County, York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 30, 2015, 1:06 PM EDT for Lancaster County, York County, Pennsylvania. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 30, 2015, 1:06 PM EDT (17:06 UTC)
Expired: Jun 30, 2015, 2:00 PM EDT
In force: 54 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Lancaster County, PA, York County, PA

The radar

The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 17:07 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.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.1 hours before the alert went out and 66 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: 600 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 728 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 9:17 AM EDT, 3 hours 49 minutes earlier.

Area forecast discussion, Jun 30, 9:17 AM EDT, 3 hours 49 minutes before

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Hazardous weather outlook, Jun 30, 6:01 AM EDT, 7 hours 5 minutes before

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In the hours before

Special weather statement, Jun 30, 9:28 AM EDT, 3 hours 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
928 AM EDT TUE JUN 30 2015

PAZ042-053-301400-
SULLIVAN PA-COLUMBIA PA-
928 AM EDT TUE JUN 30 2015

...A STRONG THUNDERSTORM WILL AFFECT EASTERN SULLIVAN...AND
NORTHERN COLUMBIA COUNTY UNTIL 1000 AM EDT...

AT 927 AM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
JAMISON CITY...MOVING NORTHEAST AT 40 MPH.

BRIEF...40 MPH WIND GUSTS AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  RICKETTS GLEN STATE PARK AROUND 930 AM EDT.

LAT...LON 4151 7623 4132 7631 4126 7631 4123 7637
      4124 7645 4128 7645 4128 7647 4133 7650
      4155 7627 4154 7622
TIME...MOT...LOC 1327Z 226DEG 36KT 4132 7637

LAMBERT

Special weather statement, Jun 30, 12:00 PM EDT, 1 hour 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1200 PM EDT TUE JUN 30 2015

PAZ058-059-066-301700-
SCHUYLKILL PA-LANCASTER PA-LEBANON PA-
1200 PM EDT TUE JUN 30 2015

...STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN SCHUYLKILL
COUNTY... NORTHERN LANCASTER COUNTY...AND THE SOUTHEASTERN
HALF OF LEBANON COUNTY UNTIL 100 PM EDT...

AT 1158 AM EDT...DOPPLER RADAR INDICATED A FEW STRONG THUNDERSTORMS
ALONG A LINE EXTENDING FROM NEAR RICHLAND TO MANHEIM...AND MOVING
NORTHEAST AT 25 MPH.

40 MPH WIND GUSTS AND PEA SIZE HAIL ARE POSSIBLE WITH THESE STORMS.

THE STRONG THUNDERSTORMS WILL BE NEAR...
  RICHLAND...MYERSTOWN AND AVON AROUND 1205 PM EDT.
  KLEINFELTERSVILLE AND SCHAEFFERSTOWN AROUND 1225 PM EDT.
  NEWMANSTOWN AND FRIEDENSBURG AROUND 1235 PM EDT.
  RENNINGERS AND SCHUYLKILL HAVEN AROUND 1250 PM EDT.
  ORWIGSBURG AROUND 1255 PM EDT.
  MCKEANSBURG AND NEW PHILADELPHIA AROUND 100 PM EDT.

OTHER LOCATIONS IMPACTED BY THESE STORMS INCLUDE AUBURN...AVON
HEIGHTS...BROCKTON...CRESSONA AND DEER LAKE.

THIS INCLUDES THE PENNSYLVANIA TURNPIKE FROM MILE MARKERS 261 TO 281.

LAT...LON 4064 7600 4057 7602 4058 7604 4053 7617
      4051 7631 4042 7632 4029 7612 4017 7620
      4004 7650 4018 7656 4023 7653 4045 7637
      4043 7632 4052 7631 4076 7609 4069 7585
TIME...MOT...LOC 1558Z 213DEG 22KT 4035 7629 4016 7639

LAMBERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 9:28 AM EDT	Special Weather Statement	CTP	Sullivan	32 min
Jun 30, 12:00 PM EDT	Special Weather Statement	CTP	Lebanon	60 min
Jun 30, 12:51 PM EDT	Areal Flood Advisory	CTP	Lebanon	3 hr
Jun 30, 1:20 PM EDT	Areal Flood Advisory	CTP	Schuylkill	3 hr
Jun 30, 1:23 PM EDT	Areal Flood Advisory	CTP	Blair, Huntingdon	3 hr
Jun 30, 1:35 PM EDT	Areal Flood Advisory	CTP	Lancaster, York	3 hr
Jun 30, 1:54 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	66 min
Jun 30, 1:59 PM EDT	Areal Flood Advisory	CTP	Centre, Huntingdon, Mifflin	3 hr
Jun 30, 2:05 PM EDT	Tornado Warning	CTP	Lancaster	25 min
Jun 30, 2:14 PM EDT	Flash Flood Watch	CTP	Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 3 more	13 hr
Jun 30, 2:26 PM EDT	Flash Flood Warning	CTP	Lancaster, York	3 hr
Jun 30, 2:46 PM EDT	Special Weather Statement	CTP	Juniata	44 min
Jun 30, 2:56 PM EDT	Special Weather Statement	CTP	Adams	49 min
Jun 30, 3:07 PM EDT	Severe Thunderstorm Warning	CTP	Mifflin, Snyder, Union	53 min
Jun 30, 3:28 PM EDT	Tornado Warning	CTP	Snyder, Union	47 min
Jun 30, 3:43 PM EDT	Special Weather Statement	CTP	Adams	32 min
Jun 30, 3:47 PM EDT	Special Weather Statement	CTP	Schuylkill	43 min
Jun 30, 3:58 PM EDT	Flash Flood Warning	CTP	Schuylkill	3 hr
Jun 30, 4:05 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	55 min
Jun 30, 4:12 PM EDT	Areal Flood Advisory	CTP	Clearfield, Elk	3 hr
Jun 30, 4:19 PM EDT	Special Weather Statement	CTP	Lebanon	56 min
Jun 30, 4:24 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	66 min
Jun 30, 4:42 PM EDT	Areal Flood Advisory	CTP	Northumberland, Snyder	3 hr
Jun 30, 4:43 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	77 min
Jun 30, 5:04 PM EDT	Areal Flood Advisory	CTP	Lancaster, Lebanon	3 hr
Jun 30, 5:37 PM EDT	Areal Flood Advisory	CTP	Cameron, Clinton, Lycoming, Potter, Tioga	3 hr
Jun 30, 5:53 PM EDT	Special Weather Statement	CTP	Adams	22 min
Jun 30, 6:03 PM EDT	Special Weather Statement	CTP	Centre	27 min
Jun 30, 6:10 PM EDT	Special Weather Statement	CTP	Lancaster	35 min
Jun 30, 7:13 PM EDT	Special Weather Statement	CTP	Union	62 min
Jun 30, 7:29 PM EDT	Special Weather Statement	CTP	Lancaster	76 min
Jun 30, 7:55 PM EDT	Special Weather Statement	CTP	Blair, Cambria	65 min
Jun 30, 7:57 PM EDT	Special Weather Statement	CTP	Lycoming, Mifflin, Montour, Northumberland, Snyder, Sullivan and 1 more	63 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2015 Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.