Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 71, NWS State College, PA

June 4, 2002Clearfield County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 4, 2002, 6:44 PM EDT for Clearfield County, Pennsylvania. It was in force for 46 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 4, 2002, 6:44 PM EDT (22:44 UTC)
Expired: Jun 4, 2002, 7:30 PM EDT
In force: 46 min
Issued by: NWS State College, PA
Area: Whole counties

County Clearfield County, PA

The radar

The State College radar (KCCX), 40 km from the middle of the area, began a volume at 22:45 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 4, 5:45 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.7 hours before the alert went out and 152 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: 693 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 798 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

947 
WUUS51 KCTP 042244
SVRCTP
PAC033-042330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
644 PM EDT TUE JUN 4 2002

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLEARFIELD COUNTY IN PENNSYLVANIA

* UNTIL 730 PM EDT.

* AT 644 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER LECONTES MILLS...OR 10 MILES NORTHEAST OF
  CLEARFIELD...MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LECONTES MILLS AT 650 PM.
  KARTHAUS AT 705 PM.

REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR
NO ADVANCED WARNING.

$$

JL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 3:27 PM EDT	Severe Thunderstorm Warning	CTP	Warren	63 min
Jun 4, 4:04 PM EDT	Severe Thunderstorm Warning	CTP	McKean	56 min
Jun 4, 4:31 PM EDT	Severe Thunderstorm Warning	CTP	Elk	59 min
Jun 4, 5:34 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	56 min
Jun 4, 5:44 PM EDT	Severe Thunderstorm Warning	CTP	McKean	61 min
Jun 4, 6:22 PM EDT	Tornado Warning	CTP	Clearfield	23 min
Jun 4, 7:04 PM EDT	Severe Thunderstorm Warning	CTP	Centre	56 min
Jun 4, 7:50 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon, Mifflin	55 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.