Alert archive / New York / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 7, NWS Burlington, VT
NWS Burlington, VT issued this severe thunderstorm warning at Jun 18, 1990, 8:50 AM EDT for Jefferson County, New York. It was in force for 55 min. 4 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
- Jun 18, 1990, 8:50 AM EDT (12:50 UTC)
- Expired
- Jun 18, 1990, 9:45 AM EDT
- In force
- 55 min
- Issued by
- NWS Burlington, VT
- Area
- Whole counties
County Jefferson County, NY
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 18, 9:22 AM EDT | Thunderstorm Wind 0 | Jefferson, NY | |
| Jun 18, 9:22 AM EDT | Thunderstorm Wind 0 | Jefferson, NY | |
| Jun 18, 9:32 AM EDT | Thunderstorm Wind 0 | Jefferson, NY | |
| Jun 18, 9:50 AM EDT | Thunderstorm Wind 0 | Jefferson, NY |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Albany, NY (KALB), launched 12:00Z, 0.8 hours before the alert went out and 231 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.
- Mixed-layer CAPE
- 18 J/kg
- Mixed-layer CIN
- -301 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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.
In the hours before
Special weather statement, Jun 18, 8:01 AM EDT, 49 minutes before
VTZ001-NYZ011-181500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 759 AM EDT MON JUN 18 1990 ...BOATERS ON LAKE CHAMPLAIN SHOULD KEEP A CLOSE EYE ON THE WEATHER TODAY... A LAKE WIND ADVISORY IS IN EFFECT FOR SOUTH WINDS OF 15 TO 30 KNOTS. IN ADDITION...THUNDERSTORMS WILL BE DEVELOPING TODAY...ESPECIALLY DURING THE AFTERNOON AND EVENING HOURS. THESE THUNDERSTORMS COULD CONTAIN HEAVY RAIN...GUSTY AND SHIFTING WINDS...FREQUENT LIGHTNING ...AND POSSIBLY SOME HAIL. THE THUNDERSTORMS WILL BE DEVELOPING IN WESTERN NEW YORK AND IN THE ADIRONDACKS...AND WILL BE MOVING INTO THE CHAMPLAIN VALLEY...AND ONTO THE LAKE. IF YOU ARE BOATING ON THE LAKE TODAY...KEEP A VERY CLOSE WATCH ON THE WEATHER TODAY...AND BE PREPARED TO HEAD TO SHORE IF THREATENING WEATHER APPROACHES. IF YOU HAVE ACTIVITIES PLANNED ON THE LAKE SHORE...YOU SHOULD BE PREPARED TO TAKE SHELTER IF THREATENING WEATHER APPROACHES. REYNOLDS
The office that day
Everything else NWS Burlington, VT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 8:50 AM EDT | Severe Thunderstorm Warning | BTV | Cayuga, Oswego | 55 min |
| Jun 18, 9:50 AM EDT | Severe Thunderstorm Warning | BTV | Lewis, Madison, Oneida | 55 min |
| Jun 18, 9:50 AM EDT | Severe Thunderstorm Warning | BTV | Onondaga | 55 min |
| Jun 18, 11:37 AM EDT | Severe Thunderstorm Warning | BTV | Clinton | 68 min |
Nearby
Severe Thunderstorm Warnings in New York, 1990Every severe thunderstorm warning in 1990
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.