Alert archive / Pennsylvania / Tornado Warnings in 2001

Tornado Warning 10, NWS State College, PA

July 11, 2001Northumberland County, Pennsylvania

NWS State College, PA issued this tornado warning at Jul 11, 2001, 5:22 AM EDT for Northumberland County, Pennsylvania. It was in force for 23 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: Jul 11, 2001, 5:22 AM EDT (09:22 UTC)
Expired: Jul 11, 2001, 5:45 AM EDT
In force: 23 min
Issued by: NWS State College, PA
Area: Whole counties

County Northumberland County, PA

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 11, 3:30 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 9.4 hours before the alert went out and 220 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: 1814 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1561 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KCTP 110923
TORCTP

PAC097-110945-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
522 AM EDT WED JUL 11 2001

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHUMBERLAND COUNTY IN PENNSYLVANIA

* UNTIL 545 AM EDT.

* AT 520 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH A DEVELOPING TORNADO NEAR SHAMOKIN
  DAM...OR JUST NORTH OF SUNBURY...MOVING EAST AT 30 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  FARNSWORTH AND STONINGTON AND TREVORTON AT 535 AM.
  SHAMOKIN AND FERNDALE AND KULPMONT AT 545 AM.

FOR YOUR PROTECTION FROM THE DAMAGING WINDS OF A TORNADO...GO TO A
BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS.

$$

LAT...LON 4098 7687 4081 7696 4072 7656 4079 7638

DAN7GELO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:09 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	51 min
Jul 10, 11:48 PM EDT	Severe Thunderstorm Warning	CTP	McKean	57 min
Jul 11, 12:24 AM EDT	Severe Thunderstorm Warning	CTP	Cameron	51 min
Jul 11, 2:15 AM EDT	Severe Thunderstorm Warning	CTP	Elk	45 min
Jul 11, 2:59 AM EDT	Tornado Warning	CTP	Clearfield, Elk	31 min
Jul 11, 3:36 AM EDT	Severe Thunderstorm Warning	CTP	Centre	54 min
Jul 11, 3:45 AM EDT	Severe Thunderstorm Warning	CTP	Lycoming	45 min
Jul 11, 4:08 AM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	67 min
Jul 11, 4:08 AM EDT	Severe Thunderstorm Warning	CTP	Union	67 min
Jul 11, 5:00 AM EDT	Tornado Warning	CTP	Snyder, Union	30 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; the sounding from the Mesonet's radiosonde archive.