Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 64, NWS State College, PA

May 31, 2002Blair County, Huntingdon County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 31, 2002, 7:18 PM EDT for Blair County, Huntingdon County, Pennsylvania. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 31, 2002, 7:18 PM EDT (23:18 UTC)
Expired: May 31, 2002, 7:45 PM EDT
In force: 27 min
Issued by: NWS State College, PA
Area: Whole counties

Counties Blair County, PA, Huntingdon County, PA

The radar

The State College radar (KCCX), 54 km from the middle of the area, began a volume at 23:21 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 31, 7:20 PM EDT	Thunderstorm Wind 50 E	Mt Union, PA	Trees were down in Mount Union.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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 31, 5:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 11.3 hours before the alert went out and 164 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: 164 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 1195 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

029 
WUUS51 KCTP 312318
SVRCTP
PAC013-061-312345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
715 PM EDT FRI MAY 31 2002

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BLAIR COUNTY IN PENNSYLVANIA
  HUNTINGDON COUNTY IN PENNSYLVANIA

* UNTIL 745 PM EDT.

* AT 714 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS ACROSS SOUTHERN BLAIR AND
  HUNTINGDON COUNTIES...MOVING SOUTHEAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  MARTINSBURG AT 725 PM.
  SKI GAP AND SHY BEAVER AT 730 PM.
  CLAYSBURG AT 735 PM.

THESE ARE DANGEROUS STORMS. STAY INDOORS AWAY FROM WINDOWS. SEVERE 
THUNDERSTORMS CONTAIN DAMAGING WINDS 58 MPH OR STRONGER OR HAIL 
THREE QUARTERS OF AN INCH OR LARGER.

$$

LAT...LON 4007 7786 4019 7817 4031 7844 4026 7846
          4035 7862 4051 7855 4061 7844 4074 7836
          4074 7815 4065 7824 4055 7821 4046 7811
          4045 7791 4027 7770

DANGELO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 3:30 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Tioga	30 min
May 31, 3:39 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	21 min
May 31, 3:57 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	48 min
May 31, 4:08 PM EDT	Severe Thunderstorm Warning	CTP	Elk	37 min
May 31, 4:35 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	40 min
May 31, 4:44 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	46 min
May 31, 5:15 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	45 min
May 31, 5:28 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	62 min
May 31, 5:40 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Huntingdon	95 min
May 31, 6:21 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin	39 min
May 31, 6:59 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Perry	46 min
May 31, 7:44 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	31 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2002 Every severe thunderstorm warning in 2002

Sources

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