Alert archive / Pennsylvania / Tornado Warnings in 2001

Tornado Warning 1, NWS State College, PA

April 9, 2001Cambria County, Pennsylvania

NWS State College, PA issued this tornado warning at Apr 9, 2001, 5:05 PM EDT for Cambria County, Pennsylvania. It was in force for 25 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: Apr 9, 2001, 5:05 PM EDT (21:05 UTC)
Expired: Apr 9, 2001, 5:30 PM EDT
In force: 25 min
Issued by: NWS State College, PA
Area: Whole counties

County Cambria County, PA

What was reported inside it

Time	Report	Where	Remark
Apr 9, 5:20 PM EDT	Thunderstorm Wind 50 E	Johnstown, PA	Trees were blown down.

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
Apr 9, 5:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.1 hours before the alert went out and 118 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: 841 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KCTP 092105
TORCTP
PAC021-092130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
505 PM EDT MON APR 9 2001

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* TORNADO WARNING FOR...
  CAMBRIA COUNTY IN PENNSYLVANIA

* UNTIL 530 PM EDT.

* AT 454 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 3 MILES NORTHWEST OF PATTON...OR 13 MILES NORTH
  OF EBENSBURG...MOVING EAST AT 45 MPH.

FOR YOUR PROTECTION...GO TO A BASEMENT OR A SMALL INTERIOR ROOM ON
THE LOWEST FLOOR OF YOUR HOME OR BUSINESS NOW

$$
GRUMM
LAT...LON 4075 7861 4058 7868 4051 7855 4071 7841

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 1:09 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	51 min
Apr 9, 2:06 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	54 min
Apr 9, 4:18 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	57 min
Apr 9, 4:32 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Clearfield	73 min
Apr 9, 5:11 PM EDT	Severe Thunderstorm Warning	CTP	Blair	79 min
Apr 9, 5:32 PM EDT	Severe Thunderstorm Warning	CTP	Potter	73 min
Apr 9, 5:39 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	66 min
Apr 9, 5:44 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon	61 min
Apr 9, 5:47 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	58 min
Apr 9, 5:54 PM EDT	Severe Thunderstorm Warning	CTP	Centre	36 min
Apr 9, 5:56 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin	79 min
Apr 9, 6:26 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan	49 min
Apr 9, 6:27 PM EDT	Severe Thunderstorm Warning	CTP	Perry	63 min
Apr 9, 6:30 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	45 min
Apr 9, 6:47 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin	73 min
Apr 9, 6:47 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Fulton	73 min
Apr 9, 7:06 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Northumberland	69 min
Apr 9, 7:08 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	97 min
Apr 9, 7:25 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon, Schuylkill	80 min
Apr 9, 7:28 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	62 min

Nearby

Tornado Warnings in Pennsylvania, 2001 Every tornado warning in 2001 Tornadoes in 2001

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.