Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 113, NWS State College, PA

July 23, 2002Huntingdon County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 23, 2002, 1:50 PM EDT for Huntingdon County, Pennsylvania. It was in force for 55 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: Jul 23, 2002, 1:50 PM EDT (17:50 UTC)
Expired: Jul 23, 2002, 2:45 PM EDT
In force: 55 min
Issued by: NWS State College, PA
Area: Whole counties

County Huntingdon County, PA

The radar

The State College radar (KCCX), 56 km from the middle of the area, began a volume at 17:51 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
Jul 23, 2:35 PM EDT	Thunderstorm Wind 50 E	Huntingdon, PA	Trees and wires were down in Huntingdon.

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
Jul 23, 12:15 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.8 hours before the alert went out and 171 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: 357 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 1190 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 69 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.

032 
WUUS51 KCTP 231750
SVRCTP
PAC061-231845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
149 PM EDT TUE JUL 23 2002

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

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

* UNTIL 245 PM EDT.

* AT 149 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER SPRUCE CREEK...OR 8 MILES SOUTHEAST OF
  TYRONE...MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WHIPPLE DAM SP AROUND 225 PM.

THE MAIN THREAT FROM THIS STORM IS A DAMAGING WIND GUSTS. EXPECT 
GUSTS TO EXCEED 60 MPH. THESE WINDS CAN EASILY KNOCK DOWN TREES AND 
POWER LINES...AND CAUSE PROPERTY DAMAGE. LARGE HAIL IS ALSO 
POSSIBLE. THE SAFEST PLACE TO BE DURING A SEVERE THUNDERSTORM IS 
INSIDE A SUBSTANTIAL SHELTER...AWAY FROM WINDOWS.

$$

LAT...LON 4063 7826 4050 7809 4057 7787 4071 7779

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 12:08 PM EDT	Severe Thunderstorm Warning	CTP	Columbia	52 min
Jul 23, 12:46 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	59 min
Jul 23, 12:52 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	23 min
Jul 23, 1:11 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	49 min
Jul 23, 1:17 PM EDT	Severe Thunderstorm Warning	CTP	Columbia	58 min
Jul 23, 1:30 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	60 min
Jul 23, 1:36 PM EDT	Severe Thunderstorm Warning	CTP	Centre	54 min
Jul 23, 2:00 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	60 min
Jul 23, 2:22 PM EDT	Severe Thunderstorm Warning	CTP	Union	23 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.