Alert archive / New York / Mesoscale Discussions in 2013
Mesoscale Discussion 757
The Storm Prediction Center issued this mesoscale discussion at May 21, 2013, 4:37 PM EDT for 4 states. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- May 21, 2013, 4:37 PM EDT (20:37 UTC)
- Expired
- May 21, 2013, 5:30 PM EDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 53 counties
Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA, Cheshire County, NH, Albany County, NY, Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Erie County, NY, Fulton County, NY, Genesee County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Montgomery County, NY, Niagara County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Orleans County, NY, Oswego County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Bennington County, VT, Windham County, VT
The radar
The Albany radar (KENX), 63 km from the middle of the area, began a volume at 20:38 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, 8.6 hours before the alert went out and 82 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
- 98 J/kg
- Mixed-layer CIN
- -172 J/kg
- Mixed-layer LCL
- 819 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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 |
|---|---|---|---|---|
| May 21, 12:54 PM EDT | Mesoscale Discussion | SPC | 66 min | |
| May 21, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | Northwest Hills Planning Region | 10 hr |
| May 21, 2:03 PM EDT | Severe Thunderstorm Watch | SPC | Capitol Planning Region, Northeastern Connecticut Planning Region | 7 hr |
| May 21, 6:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
Nearby
Mesoscale Discussions in New York, 2013Mesoscale Discussions in Massachusetts, 2013Mesoscale Discussions in Connecticut, 2013Every mesoscale discussion in 2013
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.