Alert archive / New York / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 129, NWS Burlington, VT

September 27, 2007Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Sep 27, 2007, 5:43 PM EDT for Essex County, New York. It was in force for 62 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: Sep 27, 2007, 5:43 PM EDT (21:43 UTC)
Expired: Sep 27, 2007, 6:45 PM EDT
In force: 62 min
Issued by: NWS Burlington, VT
Area: Counties, with a storm outline in the text

County Essex County, NY

The radar

The Burlington radar (KCXX), 65 km from the middle of the area, began a volume at 21:45 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
Sep 27, 1:49 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.7 hours before the alert went out and 159 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: 924 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 814 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

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 Sep 27, 4:48 PM EDT, 55 minutes earlier.

Area forecast discussion, Sep 27, 4:48 PM EDT, 55 minutes before

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Hazardous weather outlook, Sep 27, 2:04 PM EDT, 3 hours 39 minutes before

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In the hours before

Local storm report, Sep 27, 2:24 PM EDT, 3 hours 19 minutes before

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Local storm report, Sep 27, 2:37 PM EDT, 3 hours 6 minutes before

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Special weather statement, Sep 27, 3:07 PM EDT, 2 hours 36 minutes before

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Local storm report, Sep 27, 3:48 PM EDT, 1 hour 55 minutes before

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Local storm report, Sep 27, 4:47 PM EDT, 56 minutes before

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Local storm report, Sep 27, 5:22 PM EDT, 21 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
Sep 27, 1:31 PM EDT	Severe Thunderstorm Warning	BTV	Orleans	43 min
Sep 27, 1:33 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia	57 min
Sep 27, 2:13 PM EDT	Severe Thunderstorm Warning	BTV	Essex	62 min
Sep 27, 2:20 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	55 min
Sep 27, 3:39 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex	66 min

Nearby

Severe Thunderstorm Warnings in New York, 2007 Every severe thunderstorm warning in 2007

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.