Alert archive / New York / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 20, NWS Burlington, VT

July 6, 1999Franklin County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Jul 6, 1999, 3:35 PM EDT for Franklin County, New York. It was in force for 65 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 6, 1999, 3:35 PM EDT (19:35 UTC)
Expired: Jul 6, 1999, 4:40 PM EDT
In force: 65 min
Issued by: NWS Burlington, VT
Area: Whole counties

County Franklin County, NY

The radar

The Burlington radar (KCXX), 91 km from the middle of the area, began a volume at 19:36 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 6, 11:45 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.6 hours before the alert went out and 215 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: 1226 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 917 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.8

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 6, 2:51 PM EDT, 44 minutes earlier.

Area forecast discussion, Jul 6, 2:51 PM EDT, 44 minutes before

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In the hours before

Special weather statement, Jul 6, 11:40 AM EDT, 3 hours 55 minutes before

NYZ026>031-034-035-VTZ001>012-062100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
1140 AM EDT TUE JUL 6 1999

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 500 PM EDT...

THE NATIONAL WEATHER SERVICE IN BURLINGTON VERMONT HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR ALL OF NORTHERN NEW YORK AND MUCH OF
NORTHERN AND CENTRAL VERMONT.  THIS WATCH IS VALID UNTIL 500 PM EDT
AND AFFECTS THE FOLLOWING COUNTIES IN NEW YORK AND VERMONT.  FOR
NORTHERN NEW YORK...ST LAWRENCE...FRANKLIN...CLINTON AND ESSEX
COUNTIES.  IN VERMONT THE WATCH COVERS THE AREA FROM RUTLAND AND
WINDSOR COUNTIES NORTHWARD TO THE CANADIAN BORDER.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE
FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN
THESE AREAS SHOULD BE ON THE LOOKOUT FOR THUNDERSTORMS THIS AFTERNOON
THAT WILL HAVE THE POTENTIAL TO PRODUCE DAMAGING WINDS AND LARGE
HAIL.

EVENSON

Local storm report, Jul 6, 2:04 PM EDT, 1 hour 31 minutes before

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Local storm report, Jul 6, 2:05 PM EDT, 1 hour 30 minutes before

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Local storm report, Jul 6, 2:26 PM EDT, 1 hour 9 minutes before

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Local storm report, Jul 6, 3:11 PM EDT, 24 minutes before

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Local storm report, Jul 6, 3:11 PM EDT, 24 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 5, 10:26 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle	59 min
Jul 6, 1:25 PM EDT	Severe Thunderstorm Warning	BTV	Franklin	60 min
Jul 6, 1:55 PM EDT	Severe Thunderstorm Warning	BTV	Lamoille, Orleans	60 min
Jul 6, 2:08 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Washington	57 min
Jul 6, 2:08 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia	57 min
Jul 6, 2:39 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Rutland	61 min
Jul 6, 3:07 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Orange, Washington, Windsor	68 min
Jul 5, 8:32 PM EDT	Severe Thunderstorm Warning	BTV	St. Lawrence	63 min
Jul 5, 9:28 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, St. Lawrence	47 min
Jul 5, 9:51 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Essex	74 min
Jul 6, 1:25 PM EDT	Severe Thunderstorm Warning	BTV	Clinton	60 min
Jul 6, 4:02 PM EDT	Severe Thunderstorm Warning	BTV	Clinton	63 min

Nearby

Severe Thunderstorm Warnings in New York, 1999 Every severe thunderstorm warning 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.