Alert archive / New York / Mesoscale Discussions in 2004
Mesoscale Discussion 2477
The Storm Prediction Center issued this mesoscale discussion at Nov 25, 2004, 10:13 AM EST for 7 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 25, 2004, 10:13 AM EST (15:13 UTC)
- Expired
- Nov 25, 2004, 12:15 PM EST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 38 counties
Bristol County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, York County, ME, Belknap County, NH, Cheshire County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Morris County, NJ, Sussex County, NJ, Albany County, NY, Columbia County, NY, Fulton County, NY, Greene County, NY, Montgomery County, NY, Orange County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Suffolk County, NY, Ulster County, NY, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI, Windham County, VT
The radar
The Boston radar (KBOX), 117 km from the middle of the area, began a volume at 15:14 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, 3.2 hours before the alert went out and 121 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
- 192 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 774 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.4
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 |
|---|---|---|---|---|
| Nov 25, 8:55 AM EST | Severe Thunderstorm Watch | SPC | 5 hr | |
| Nov 25, 11:00 AM EST | Severe Thunderstorm Watch | SPC | 5 hr | |
| Nov 25, 12:48 PM EST | Mesoscale Discussion | SPC | 117 min | |
| Nov 25, 7:12 AM EST | Mesoscale Discussion | SPC | Bergen, Burlington, Camden, Cumberland, Essex, Gloucester and 10 more | 63 min |
Nearby
Mesoscale Discussions in New York, 2004Mesoscale Discussions in Massachusetts, 2004Mesoscale Discussions in New Hampshire, 2004Every mesoscale discussion in 2004
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.