Alert archive / New York / Mesoscale Discussions in 2003
Mesoscale Discussion 1946
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2003, 7:51 PM EDT for 6 states. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2003, 7:51 PM EDT (23:51 UTC)
- Expired
- Jul 21, 2003, 9:15 PM EDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 47 counties
Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA, Cheshire County, NH, Hillsborough County, NH, Sullivan County, NH, Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Hunterdon County, NJ, Middlesex County, NJ, Morris County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Albany County, NY, Bronx County, NY, Columbia County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Kings County, NY, Montgomery County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Suffolk County, NY, Ulster County, NY, Washington County, NY, Westchester County, NY, Bucks County, PA, Northampton County, PA, Bennington County, VT, Windham County, VT, Windsor County, VT
The radar
The Albany radar (KENX), 82 km from the middle of the area, began a volume at 23:52 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, 11.9 hours before the alert went out and 95 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
- 159 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 906 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 178 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 |
|---|---|---|---|---|
| Jul 21, 3:35 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr | |
| Jul 21, 6:30 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr | |
| Jul 21, 2:46 PM EDT | Mesoscale Discussion | SPC | Berkshire, Franklin, Hampshire | 119 min |
| Jul 21, 1:15 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cattaraugus, Chemung, Schuyler, Steuben and 2 more | 2 hr |
| Jul 21, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Broome, Chemung, Cortland, Schuyler, Steuben and 2 more | 6 hr |
| Jul 21, 3:51 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Chemung, Cortland, Schuyler, Steuben and 2 more | 114 min |
| Jul 21, 8:40 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Greene and 4 more | 5 hr |
Nearby
Mesoscale Discussions in New York, 2003Mesoscale Discussions in New Jersey, 2003Mesoscale Discussions in Connecticut, 2003Every mesoscale discussion in 2003
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.