Alert archive / New York / Mesoscale Discussions in 2014

Mesoscale Discussion 1448

July 23, 20147 states

The Storm Prediction Center issued this mesoscale discussion at Jul 23, 2014, 6:16 PM EDT for 7 states. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Jul 23, 2014, 6:16 PM EDT (22:16 UTC)
Expired
Jul 23, 2014, 7:45 PM EDT
In force
89 min
Issued by
the Storm Prediction Center
All 42 counties

Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Cumberland County, ME, Hancock County, ME, Lincoln County, ME, Sagadahoc County, ME, York County, ME, Belknap County, NH, Cheshire County, NH, Hillsborough County, NH, Merrimack County, NH, Strafford County, NH, Sullivan County, NH, Bergen County, NJ, Essex County, NJ, Hunterdon County, NJ, Morris County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Albany County, NY, Columbia County, NY, Dutchess County, NY, Greene County, NY, Orange County, NY, Putnam County, NY, Rensselaer County, NY, Rockland County, NY, Sullivan County, NY, Ulster County, NY, Westchester County, NY, Berks County, PA, Bucks County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Pike County, PA, Windham County, VT

The radar

The Boston radar (KBOX), 131 km from the middle of the area, began a volume at 22:18 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

Albany, NY (KALY), launched 12:00Z, 10.3 hours before the alert went out and 118 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 2014-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 160 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 2014-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 square meters per square second.1939Sfc1 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
160 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
885 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
119 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
Jul 23, 2:17 PM EDTSevere Thunderstorm WatchSPCCapitol Planning Region, Northwest Hills Planning Region7 hr
Jul 23, 1:21 PM EDTMesoscale DiscussionSPCAndroscoggin, Cumberland, Franklin, Kennebec, Oxford, Penobscot and 2 more114 min
Jul 23, 4:25 PM EDTMesoscale DiscussionSPCAndroscoggin, Cumberland, Franklin, Kennebec, Lincoln, Oxford and 4 more2 hr

Nearby

Mesoscale Discussions in New York, 2014Mesoscale Discussions in New Jersey, 2014Mesoscale Discussions in Pennsylvania, 2014Every mesoscale discussion in 2014

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.