Alert archive / Vermont / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 10, NWS Burlington, VT

July 7, 1997Addison County, Vermont; Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Jul 7, 1997, 12:48 PM EDT for Addison County, Vermont; Essex County, New York. It was in force for 57 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 7, 1997, 12:48 PM EDT (16:48 UTC)
Expired: Jul 7, 1997, 1:45 PM EDT
In force: 57 min
Issued by: NWS Burlington, VT
Area: Whole counties

Counties Essex County, NY, Addison County, VT

The radar

The Burlington radar (KCXX), 54 km from the middle of the area, began a volume at 16:50 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.

What was reported inside it

Time	Report	Where	Remark
Jul 7, 1:00 PM EDT	Hail 0.75	Ticonderoga, NY	A cold front moved across northern New York during the late morning and afternoon hours of Monday, July 7, 1997. Showers and thunderstorms accompanied this front with locally heavy rain and some large hail.
Jul 7, 1:40 PM EDT	Hail 1.25	Middlebury, VT

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 4.8 hours before the alert went out and 157 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: 67 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1519 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 54 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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Burlington, VT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 7, 10:05 AM EDT, 2 hours 43 minutes earlier.

Area forecast discussion, Jul 7, 10:05 AM EDT, 2 hours 43 minutes before

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The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 7, 2:02 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Rutland, Windsor	58 min
Jul 7, 2:05 PM EDT	Severe Thunderstorm Warning	BTV	Washington	55 min
Jul 7, 2:37 PM EDT	Severe Thunderstorm Warning	BTV	Essex	68 min
Jul 7, 4:05 PM EDT	Severe Thunderstorm Warning	BTV	Orleans	55 min

Nearby

Severe Thunderstorm Warnings in Vermont, 1997 Severe Thunderstorm Warnings in New York, 1997 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.