Alert archive / New York / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 97, NWS New York, NY

November 17, 2010Putnam County, Westchester County, New York; Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut

NWS New York, NY issued this severe thunderstorm warning at Nov 17, 2010, 4:26 AM EST for Putnam County, Westchester County, New York; Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut. It was in force for 49 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: Nov 17, 2010, 4:26 AM EST (09:26 UTC)
Expired: Nov 17, 2010, 5:15 AM EST
In force: 49 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Greater Bridgeport Planning Region, CT, Naugatuck Valley Planning Region, CT, Putnam County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 72 km from the middle of the area, began a volume at 09:28 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
Nov 17, 3:38 AM EST	Severe Thunderstorm Watch	SPC	2 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 9.4 hours before the alert went out and 72 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 226 m²/s²
0-3 km storm-relative helicity: 367 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 New York, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Nov 16, 4:22 PM EST, 12 hours 4 minutes earlier.

Area forecast discussion, Nov 16, 4:22 PM EST, 12 hours 4 minutes before

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Hazardous weather outlook, Nov 16, 4:01 PM EST, 12 hours 25 minutes before

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The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 17, 3:39 AM EST	Severe Thunderstorm Warning	OKX	Orange, Putnam, Rockland, Westchester	66 min
Nov 17, 3:44 AM EST	Severe Thunderstorm Warning	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond and 2 more	61 min
Nov 17, 3:47 AM EST	Special Marine Warning	OKX		58 min
Nov 17, 4:43 AM EST	Severe Thunderstorm Warning	OKX	Bronx, Kings, Nassau, New York, Orange, Putnam and 3 more	29 min
Nov 17, 4:21 AM EST	Special Weather Statement	OKX		39 min
Nov 17, 5:17 AM EST	Special Weather Statement	OKX		58 min

Nearby

Severe Thunderstorm Warnings in New York, 2010 Severe Thunderstorm Warnings in Connecticut, 2010 Every severe thunderstorm warning in 2010

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.