Alert archive / New York / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 628

July 18, 199730 counties in New York

The Storm Prediction Center issued this severe thunderstorm watch at Jul 18, 1997, 3:00 PM EDT for 30 counties in New York. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 18, 1997, 3:00 PM EDT (19:00 UTC)
Expired
Jul 18, 1997, 9:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 30 counties

Albany County, NY, Broome County, NY, Chenango County, NY, Clinton County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Oswego County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, St. Lawrence County, NY, Tioga County, NY, Ulster County, NY, Warren County, NY, Washington County, NY

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 18, 3:30 PM EDTSevere Thunderstorm WarningBUFLewis60 min
Jul 18, 3:33 PM EDTSevere Thunderstorm WarningBTVSt. Lawrence57 min
Jul 18, 3:39 PM EDTSevere Thunderstorm WarningALYHamilton, Herkimer96 min
Jul 18, 5:08 PM EDTSevere Thunderstorm WarningALYWarren67 min
Jul 18, 5:48 PM EDTSevere Thunderstorm WarningALYWashington57 min
Jul 18, 8:35 PM EDTSevere Thunderstorm WarningBGMTioga40 min

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.0 hours before the alert went out and 119 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, Albany, NY at 12:00Z on 1997-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 964 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, Albany, NY at 12:00Z on 1997-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.19395878Sfc1 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
964 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
788 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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 18, 1:45 PM EDTSevere Thunderstorm WatchSPCAllegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Erie and 12 more6 hr
Jul 18, 4:45 PM EDTSevere Thunderstorm WatchSPCBronx, Dutchess, Kings, Nassau, New York, Orange and 6 more6 hr

Nearby

Severe Thunderstorm Watches in New York, 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.