Alert archive / New York / Mesoscale Discussions in 2017
Mesoscale Discussion 1360
The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2017, 11:36 AM EDT for 16 counties in New York; Ashtabula County, Lake County, Trumbull County, Ohio; 12 counties in Pennsylvania. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2017, 11:36 AM EDT (15:36 UTC)
- Expired
- Jul 20, 2017, 1:30 PM EDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 31 counties
Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Chemung County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Orleans County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tompkins County, NY, Wyoming County, NY, Yates County, NY, Ashtabula County, OH, Lake County, OH, Trumbull County, OH, Cameron County, PA, Clarion County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Forest County, PA, McKean County, PA, Mercer County, PA, Potter County, PA, Tioga County, PA, Venango County, PA, Warren County, PA
The radar
The Buffalo radar (KBUF), 77 km from the middle of the area, began a volume at 15:37 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 12:00Z, 3.6 hours before the alert went out and 75 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2004 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Broome, Cayuga, Chemung, Chenango, Cortland and 14 more | 6 hr |
| Jul 20, 3:03 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cayuga, Chemung, Chenango, Cortland and 13 more | 87 min |
| Jul 20, 4:33 PM EDT | Mesoscale Discussion | SPC | Bronx, Broome, Columbia, Delaware, Dutchess, Greene and 11 more | 87 min |
| Jul 20, 5:03 PM EDT | Severe Thunderstorm Watch | SPC | Bronx, Kings, Nassau, New York, Orange, Queens and 3 more | 5 hr |
| Jul 20, 7:48 PM EDT | Mesoscale Discussion | SPC | Bronx, Kings, New York, Queens, Richmond, Rockland | 87 min |
| Jul 20, 3:50 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Carroll, Columbiana, Coshocton, Fairfield and 21 more | 2 hr |
Nearby
Mesoscale Discussions in New York, 2017Mesoscale Discussions in Pennsylvania, 2017Mesoscale Discussions in Ohio, 2017Every mesoscale discussion in 2017
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.