Alert archive / West Virginia / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 666

July 28, 19974 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 28, 1997, 1:30 PM EDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 28, 1997, 1:30 PM EDT (17:30 UTC)
Expired
Jul 28, 1997, 7:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 25 counties

Allegany County, MD, Garrett County, MD, Bedford County, PA, Fayette County, PA, Greene County, PA, Somerset County, PA, Washington County, PA, City of Harrisonburg, VA, Page County, VA, Rockingham County, VA, Shenandoah County, VA, Barbour County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Marion County, WV, Mineral County, WV, Monongalia County, WV, Pendleton County, WV, Preston County, WV, Randolph County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV

The radar

The Pittsburgh radar (KPBZ), 114 km from the middle of the area, began a volume at 17:33 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.

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 28, 1:58 PM EDTSevere Thunderstorm WarningPBZFayette62 min
Jul 28, 2:19 PM EDTSevere Thunderstorm WarningCTPSomerset61 min
Jul 28, 2:34 PM EDTSevere Thunderstorm WarningPBZGarrett41 min
Jul 28, 2:34 PM EDTSevere Thunderstorm WarningPBZMarion, Monongalia41 min
Jul 28, 3:03 PM EDTSevere Thunderstorm WarningLWXAllegany42 min
Jul 28, 3:08 PM EDTSevere Thunderstorm WarningCTPBedford62 min
Jul 28, 3:48 PM EDTSevere Thunderstorm WarningPBZTucker42 min
Jul 28, 3:55 PM EDTSevere Thunderstorm WarningLWXHampshire45 min
Jul 28, 3:59 PM EDTSevere Thunderstorm WarningRLXHarrison46 min

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 5.5 hours before the alert went out and 97 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 1997-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 448 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 1997-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
448 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
813 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 28, 4:45 PM EDTSevere Thunderstorm WatchSPCAnne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 11 more5 hr

Nearby

Severe Thunderstorm Watches in West Virginia, 1997Severe Thunderstorm Watches in Pennsylvania, 1997Severe Thunderstorm Watches in Virginia, 1997Every severe thunderstorm watch in 1997

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.