Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 35, NWS Burlington, VT

July 11, 2009Essex County, Franklin County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Jul 11, 2009, 3:46 PM EDT for Essex County, Franklin County, New York. It was in force for 59 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 11, 2009, 3:46 PM EDT (19:46 UTC)
Expired: Jul 11, 2009, 4:45 PM EDT
In force: 59 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon

Counties Essex County, NY, Franklin County, NY

The radar

The Burlington radar (KCXX), 71 km from the middle of the area, began a volume at 19:46 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 11, 10:57 AM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.8 hours before the alert went out and 186 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: 23 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 11, 3:19 PM EDT, 27 minutes earlier.

Area forecast discussion, Jul 11, 3:19 PM EDT, 27 minutes before

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Hazardous weather outlook, Jul 11, 11:01 AM EDT, 4 hours 45 minutes before

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In the hours before

Special weather statement, Jul 11, 10:17 AM EDT, 5 hours 29 minutes before

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Special weather statement, Jul 11, 11:29 AM EDT, 4 hours 17 minutes before

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Special weather statement, Jul 11, 11:50 AM EDT, 3 hours 56 minutes before

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Special weather statement, Jul 11, 12:24 PM EDT, 3 hours 22 minutes before

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Special weather statement, Jul 11, 3:31 PM EDT, 15 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 11, 5:44 PM EDT	Special Weather Statement	BTV	Addison, Chittenden, Orange, Washington	61 min
Jul 11, 11:29 AM EDT	Special Weather Statement	BTV	St. Lawrence	61 min
Jul 11, 11:50 AM EDT	Special Weather Statement	BTV	St. Lawrence	55 min
Jul 11, 12:24 PM EDT	Special Weather Statement	BTV	St. Lawrence	66 min
Jul 11, 3:31 PM EDT	Special Weather Statement	BTV	Essex	59 min
Jul 11, 4:11 PM EDT	Special Weather Statement	BTV	Essex	64 min

Nearby

Severe Thunderstorm Warnings in New York, 2009 Every severe thunderstorm warning in 2009

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.