Alert archive / New York / Mesoscale Discussions in 2012
Mesoscale Discussion 1707
The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2012, 12:06 PM EDT for 16 counties in New York; 11 counties in Pennsylvania. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2012, 12:06 PM EDT (16:06 UTC)
- Expired
- Aug 5, 2012, 1:30 PM EDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 27 counties
Allegany County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Oswego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Cameron County, PA, Clarion County, PA, Clearfield County, PA, Crawford County, PA, Elk County, PA, Forest County, PA, Jefferson County, PA, McKean County, PA, Potter County, PA, Venango County, PA, Warren County, PA
The radar
The Buffalo radar (KBUF), 74 km from the middle of the area, began a volume at 16:06 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, 4.1 hours before the alert went out and 70 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
- 128 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 1179 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 12:42 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Cortland and 20 more | 6 hr |
| Aug 5, 2:49 PM EDT | Mesoscale Discussion | SPC | Bronx, Broome, Chemung, Chenango, Delaware, Dutchess and 10 more | 86 min |
| Aug 5, 4:21 PM EDT | Mesoscale Discussion | SPC | Cayuga, Clinton, Cortland, Essex, Franklin, Fulton and 13 more | 84 min |
| Aug 5, 6:38 PM EDT | Mesoscale Discussion | SPC | Bronx, Kings, Nassau, New York, Putnam, Queens and 4 more | 2 hr |
| Aug 4, 10:46 PM EDT | Mesoscale Discussion | SPC | Mercer | 119 min |
| Aug 5, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | Berks, Bucks, Carbon, Chester, Dauphin, Delaware and 9 more | 5 hr |
Nearby
Mesoscale Discussions in New York, 2012Mesoscale Discussions in Pennsylvania, 2012Every mesoscale discussion in 2012
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.