Alert archive / Pennsylvania / Tornado Warnings in 2000

Tornado Warning 18, NWS State College, PA

July 21, 2000Columbia County, Pennsylvania

NWS State College, PA issued this tornado warning at Jul 21, 2000, 5:21 PM EDT for Columbia County, Pennsylvania. It was in force for 24 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 21, 2000, 5:21 PM EDT (21:21 UTC)
Expired
Jul 21, 2000, 5:45 PM EDT
In force
24 min
Issued by
NWS State College, PA
Area
Whole counties

County Columbia County, PA

The radar

The Binghamton radar (KBGM), 133 km from the middle of the area, began a volume at 21:21 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.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.4 hours before the alert went out and 177 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-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 2000-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2000-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1735 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
39 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.

180 
WFUS51 KCTP 212122
TORCTP
PAC037-212145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
521 PM EDT FRI JUL 21 2000

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* TORNADO WARNING FOR...
  COLUMBIA COUNTY.

* UNTIL 545 PM EDT.

* AT 515 PM EDT..THE PUBLIC REPORTED A TORNADO 3 MILES NORTH OF
  MILLVILLE...OR 12 MILES NORTH OF BLOOMSBURG...MOVING EAST AT 25
  MPH.

* THE TORNADO WILL BE NEAR...
  BENTON AND STILLWATER AT 530 PM.

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

$$

LAT...LON 4125 7662 4107 7657 4112 7619 4132 7624

&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 2:47 PM EDTSevere Thunderstorm WarningCTPColumbia, Lycoming, Montour58 min
Jul 21, 2:55 PM EDTTornado WarningCTPColumbia35 min
Jul 21, 5:44 PM EDTSevere Thunderstorm WarningCTPColumbia16 min

Nearby

Tornado Warnings in Pennsylvania, 2000Every tornado warning in 2000Tornadoes in 2000

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.