Alert archive / New York / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 489
The Storm Prediction Center issued this severe thunderstorm watch at Jul 5, 2007, 3:34 PM EDT for 6 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 5, 2007, 3:34 PM EDT (19:34 UTC)
- Expired
- Jul 5, 2007, 9:01 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 44 counties
Capitol Planning Region, CT, Greater Bridgeport Planning Region, CT, Naugatuck Valley Planning Region, CT, Northeastern Connecticut Planning Region, CT, Northwest Hills Planning Region, CT, Berkshire County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Suffolk County, MA, Worcester County, MA, Cumberland County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Albany County, NY, Columbia County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Montgomery County, NY, Orange County, NY, Putnam County, NY, Rensselaer County, NY, Rockland County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Ulster County, NY, Washington County, NY, Westchester County, NY, Bennington County, VT, Rutland County, VT, Windham County, VT, Windsor County, VT
The radar
The Albany radar (KENX), 89 km from the middle of the area, began a volume at 19:33 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 4:46 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 14 min |
| Jul 5, 6:24 PM EDT | Severe Thunderstorm Warning | GYX | Rockingham | 36 min |
| Jul 5, 6:38 PM EDT | Flash Flood Warning | ALY | Ulster | 3 hr |
| Jul 5, 6:45 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 45 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 7.6 hours before the alert went out and 68 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
- 117 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 460 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 3:10 PM EDT | Mesoscale Discussion | SPC | 65 min | |
| Jul 5, 4:12 PM EDT | Mesoscale Discussion | SPC | 2 hr | |
| Jul 5, 12:17 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cattaraugus, Chemung, Chenango, Cortland and 8 more | 118 min |
| Jul 5, 1:00 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Broome, Cattaraugus, Cayuga, Chemung, Chenango and 13 more | 7 hr |
Nearby
Severe Thunderstorm Watches in New York, 2007Severe Thunderstorm Watches in New Hampshire, 2007Severe Thunderstorm Watches in Massachusetts, 2007Every severe thunderstorm watch in 2007
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.