Alert archive / New York / Mesoscale Discussions in 2015

Mesoscale Discussion 1130

June 23, 201527 counties in New York; McKean County, Potter County, Warren County, Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2015, 4:24 AM EDT for 27 counties in New York; McKean County, Potter County, Warren County, Pennsylvania. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Jun 23, 2015, 4:24 AM EDT (08:24 UTC)
Expired
Jun 23, 2015, 5:30 AM EDT
In force
66 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 30 counties

Allegany County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Erie County, NY, Genesee County, NY, Hamilton County, NY, Herkimer County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, McKean County, PA, Potter County, PA, Warren County, PA

The radar

The Buffalo radar (KBUF), 117 km from the middle of the area, began a volume at 08:25 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 8.4 hours before the alert went out and 114 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, Buffalo Intl Airport, NY at 00:00Z on 2015-06-23Temperature 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, Buffalo Intl Airport, NY at 00:00Z on 2015-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 202 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2108 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
202 m²/s²
0-3 km storm-relative helicity
298 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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, 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, 8:39 AM EDTMesoscale DiscussionSPCBroome, Chenango, Delaware, Sullivan96 min
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 New York, 2015Mesoscale Discussions in Pennsylvania, 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.