Alert archive / Pennsylvania / Tornado Warnings in 1999

Tornado Warning 6, NWS Cleveland, OH

July 3, 1999Crawford County, Pennsylvania

NWS Cleveland, OH issued this tornado warning at Jul 3, 1999, 4:06 PM EDT for Crawford County, Pennsylvania. It was in force for 34 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 3, 1999, 4:06 PM EDT (20:06 UTC)
Expired
Jul 3, 1999, 4:40 PM EDT
In force
34 min
Issued by
NWS Cleveland, OH
Area
Whole counties

County Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 129 km from the middle of the area, began a volume at 20:06 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

Pittsburgh, PA (KPIT), launched 12:00Z, 8.1 hours before the alert went out and 142 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, Pittsburgh, PA at 12:00Z on 1999-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1069 joules per kilogram.LCLLFCEL10008507005003002001001 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, Pittsburgh, PA at 12:00Z on 1999-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
1069 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 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.

000 
TTAA00 KCLE 032011 RRA
TORCLE
PAC039-032040-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
406 PM EDT SAT JUL 3 1999

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* TORNADO WARNING FOR...
  CRAWFORD COUNTY PA IN NORTHWESTERN PENNSYLVANIA

* UNTIL 440 PM EDT

* AT 403 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  POSSIBLE TORNADO 17 MILES NORTHWEST OF MEADVILLE OR 3 MILES EAST OF
  BEAVER CENTER... MOVING EAST AT 10 MPH. STORM SPOTTERS REPORTED A
  FUNNEL CLOUDS WITH THIS STORM.

* THE TORNADO WILL MOVE...NEAR SPRINGBORO.


GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR
$$

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 3, 3:22 PM EDTSevere Thunderstorm WarningCLECrawford63 min
Jul 3, 4:38 PM EDTSevere Thunderstorm WarningCLEErie62 min
Jul 3, 5:38 PM EDTSevere Thunderstorm WarningCLEErie47 min

Nearby

Tornado Warnings in Pennsylvania, 1999Every tornado warning in 1999Tornadoes in 1999

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.