Alert archive / Pennsylvania / Mesoscale Discussions in 2015

Mesoscale Discussion 1132

June 23, 20154 counties in New York; 18 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2015, 8:39 AM EDT for 4 counties in New York; 18 counties in Pennsylvania. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Jun 23, 2015, 8:39 AM EDT (12:39 UTC)
Expired
Jun 23, 2015, 10:15 AM EDT
In force
96 min
Issued by
the Storm Prediction Center
All 22 counties

Broome County, NY, Chenango County, NY, Delaware County, NY, Sullivan County, NY, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Elk County, PA, Lackawanna County, PA, Luzerne County, PA, Lycoming County, PA, Montour County, PA, Northumberland County, PA, Pike County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Union County, PA, Wayne County, PA, Wyoming County, PA

The radar

The Binghamton radar (KBGM), 90 km from the middle of the area, began a volume at 12:40 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, 0.7 hours before the alert went out and 263 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 2015-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 56 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 2015-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 396 square meters per square second.19395878Sfc1 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
56 J/kg
Mixed-layer CIN
-246 J/kg
Mixed-layer LCL
1348 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
396 m²/s²
0-3 km storm-relative helicity
462 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Jun 23, 4:24 AM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Chenango and 21 more66 min
Jun 23, 5:30 AM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Chautauqua, Steuben, Yates60 min
Jun 23, 6:08 AM EDTSevere Thunderstorm WatchSPCChemung, Schuyler, Steuben, Tioga, Tompkins4 hr
Jun 23, 8:57 AM EDTMesoscale DiscussionSPCColumbia, Dutchess, Greene, Orange, Putnam, Rockland and 2 more63 min
Jun 23, 10:12 AM EDTSevere Thunderstorm WatchSPCBronx, Columbia, Dutchess, Greene, Kings, Nassau and 10 more6 hr
Jun 23, 2:46 PM EDTMesoscale DiscussionSPCAlbany, Columbia, Delaware, Dutchess, Essex, Fulton and 18 more89 min
Jun 23, 3:35 PM EDTSevere Thunderstorm WatchSPCAlbany, Bronx, Columbia, Dutchess, Fulton, Greene and 18 more6 hr
Jun 23, 5:47 PM EDTMesoscale DiscussionSPCKings, Richmond88 min
Jun 23, 7:41 PM EDTMesoscale DiscussionSPCKings, Richmond94 min
Jun 23, 3:30 AM EDTSevere Thunderstorm WatchSPCCrawford, Erie3 hr
Jun 23, 10:20 AM EDTSevere Thunderstorm WatchSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 30 more7 hr
Jun 23, 10:28 AM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Somerset, Washington and 1 more2 hr
Jun 23, 1:17 PM EDTSevere Thunderstorm WatchSPCAllegheny, Armstrong, Beaver, Butler, Fayette, Greene and 3 more7 hr
Jun 23, 3:25 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 21 more95 min
Jun 23, 4:09 PM EDTSevere Thunderstorm WatchSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more7 hr

Nearby

Mesoscale Discussions in Pennsylvania, 2015Mesoscale Discussions in New York, 2015Every mesoscale discussion in 2015

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.