Alert archive / Maryland / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 700

August 17, 19975 states

The Storm Prediction Center issued this severe thunderstorm watch at Aug 17, 1997, 6:00 PM EDT for 5 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Aug 17, 1997, 6:00 PM EDT (22:00 UTC)
Expired: Aug 18, 1997, 12:00 AM EDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 34 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Calvert County, MD, Caroline County, MD, Cecil County, MD, Charles County, MD, Dorchester County, MD, Harford County, MD, Kent County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Wicomico County, MD, Worcester County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Ocean County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Philadelphia County, PA, Caroline County, VA, Essex County, VA, King George County, VA, Richmond County, VA, Westmoreland County, VA

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Aug 17, 6:48 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	47 min
Aug 17, 6:59 PM EDT	Severe Thunderstorm Warning	LWX	Charles	46 min
Aug 17, 7:45 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard	30 min
Aug 17, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	32 min
Aug 17, 8:09 PM EDT	Severe Thunderstorm Warning	LWX	Harford	46 min
Aug 17, 8:17 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	48 min
Aug 17, 8:17 PM EDT	Severe Thunderstorm Warning	PHI	Kent	48 min
Aug 17, 10:00 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	45 min
Aug 17, 11:06 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	44 min
Aug 17, 11:58 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	32 min

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.0 hours before the alert went out and 127 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: 129 J/kg
Mixed-layer CIN: -282 J/kg
Mixed-layer LCL: 1590 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -40 m²/s²
0-3 km storm-relative helicity: 37 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.

Issued	Product	Office	Counties	Lasted
Aug 17, 4:30 PM EDT	Severe Thunderstorm Watch	SPC	Allegany, Baltimore, Carroll, Frederick, Garrett, Howard and 3 more	7 hr

Nearby

Severe Thunderstorm Watches in Maryland, 1997 Severe Thunderstorm Watches in New Jersey, 1997 Severe Thunderstorm Watches in Virginia, 1997 Every 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.