Alert archive / New York / Mesoscale Discussions in 2013

Mesoscale Discussion 768

May 22, 20135 states

The Storm Prediction Center issued this mesoscale discussion at May 22, 2013, 11:31 AM EDT for 5 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
May 22, 2013, 11:31 AM EDT (15:31 UTC)
Expired
May 22, 2013, 1:30 PM EDT
In force
119 min
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 36 counties

Berkshire County, MA, Sussex County, NJ, Albany County, NY, Broome County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Orange County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Tioga County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Lackawanna County, PA, Monroe County, PA, Pike County, PA, Susquehanna County, PA, Wayne County, PA, Wyoming County, PA, Bennington County, VT, Rutland County, VT, Windham County, VT

The radar

The Albany radar (KENX), 41 km from the middle of the area, began a volume at 15:35 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 3.5 hours before the alert went out and 63 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, Albany, NY at 12:00Z on 2013-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 132 joules per kilogram.LCLLFCEL10008507005003002001001 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, Albany, NY at 12:00Z on 2013-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.193958Sfc1 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
132 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 21, 8:29 PM EDTMesoscale DiscussionSPCBerkshire, Franklin, Hampden, Hampshire, Worcester61 min
May 22, 12:58 PM EDTSevere Thunderstorm WatchSPCBerkshire, Franklin, Hampden, Hampshire, Worcester10 hr
May 22, 4:28 PM EDTMesoscale DiscussionSPCBerkshire, Franklin92 min
May 22, 7:41 PM EDTMesoscale DiscussionSPCBerkshire94 min
May 22, 2:46 PM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Cortland and 20 more119 min
May 22, 3:41 PM EDTSevere Thunderstorm WatchSPCAllegany, Broome, Cattaraugus, Cayuga, Chautauqua, Chemung and 22 more7 hr
May 22, 2:08 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 8 more2 hr
May 22, 2:27 PM EDTSevere Thunderstorm WatchSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 20 more7 hr
May 22, 3:53 PM EDTMesoscale DiscussionSPCAdams, Bedford, Centre, Cumberland, Dauphin, Franklin and 11 more67 min
May 22, 6:20 PM EDTMesoscale DiscussionSPCAdams, Centre, Clinton, Cumberland, Dauphin, Franklin and 8 more85 min

Nearby

Mesoscale Discussions in New York, 2013Mesoscale Discussions in Pennsylvania, 2013Mesoscale Discussions in Vermont, 2013Every mesoscale discussion in 2013

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.