Alert archive / New York / Winter Storm Warnings in 2009

Winter Storm Warning 8, NWS Albany, NY

December 19, 2009Dutchess County, Ulster County, New York; Berkshire County, Massachusetts

NWS Albany, NY issued this winter storm warning at Dec 19, 2009, 3:46 AM EST for Dutchess County, Ulster County, New York; Berkshire County, Massachusetts. It took effect at Dec 19, 2009, 7:00 PM EST. It was in force for 14 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 19, 2009, 3:46 AM EST (08:46 UTC)
In effect from
Dec 19, 2009, 7:00 PM EST
Expired
Dec 20, 2009, 9:24 AM EST
In force
14 hr
Issued by
NWS Albany, NY

Counties Berkshire County, MA, Dutchess County, NY, Ulster County, NY

The radar

The Albany radar (KENX), 70 km from the middle of the area, began a volume at 08:45 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 nearest sounding before it

Chatham, MA (KCHH), launched 00:00Z, 8.8 hours before the alert went out and 314 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-pSkew-T log-p diagram, Chatham, MA at 00:00Z on 2009-12-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 00:00Z on 2009-12-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939587897117136156Sfc1 km3 km6 km9 kmRMLM
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
1911 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 19, 12:10 PM ESTWinter Weather AdvisoryALYColumbia, Ulster16 hr

Nearby

Winter Storm Warnings in New York, 2009Winter Storm Warnings in Massachusetts, 2009Every winter storm 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.