Alert archive / New York / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 709
The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2008, 2:11 PM EDT for 7 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2008, 2:11 PM EDT (18:11 UTC)
- Expired
- Jul 20, 2008, 10:11 PM EDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 48 counties
Capitol 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, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Cheshire County, NH, Hillsborough County, NH, Albany County, NY, Broome County, NY, Cayuga County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Herkimer County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Washington County, NY, Lackawanna County, PA, Luzerne County, PA, Pike County, PA, Susquehanna County, PA, Wayne County, PA, Wyoming County, PA, Providence County, RI, Bennington County, VT, Windham County, VT
The radar
The Albany radar (KENX), 34 km from the middle of the area, began a volume at 18:11 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
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
35 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 2:51 PM EDT | Severe Thunderstorm Warning | BGM | Cayuga, Seneca, Yates | 54 min |
| Jul 20, 3:05 PM EDT | Severe Thunderstorm Warning | BGM | Oneida | 55 min |
| Jul 20, 3:06 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Suffolk | 24 min |
| Jul 20, 3:20 PM EDT | Severe Thunderstorm Warning | BGM | Cayuga, Onondaga | 25 min |
| Jul 20, 3:32 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Plymouth, Suffolk | 13 min |
| Jul 20, 3:37 PM EDT | Severe Thunderstorm Warning | BGM | Cayuga, Chenango, Cortland, Madison, Oneida, Onondaga and 2 more | 38 min |
| Jul 20, 3:53 PM EDT | Severe Thunderstorm Warning | BOX | Norfolk, Plymouth | 22 min |
| Jul 20, 3:59 PM EDT | Severe Thunderstorm Warning | BGM | Madison, Oneida | 61 min |
| Jul 20, 4:02 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 13 min |
| Jul 20, 4:10 PM EDT | Severe Thunderstorm Warning | BGM | Cayuga, Chenango, Cortland, Madison, Oneida, Onondaga and 3 more | 50 min |
| Jul 20, 4:15 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 45 min |
| Jul 20, 4:21 PM EDT | Severe Thunderstorm Warning | ALY | Fulton, Hamilton, Herkimer, Montgomery | 54 min |
| Jul 20, 4:26 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth | 34 min |
| Jul 20, 4:45 PM EDT | Severe Thunderstorm Warning | BOX | Cheshire, Hillsborough | 30 min |
| Jul 20, 4:50 PM EDT | Severe Thunderstorm Warning | ALY | Herkimer, Montgomery | 55 min |
| Jul 20, 4:51 PM EDT | Severe Thunderstorm Warning | ALY | Saratoga | 39 min |
| Jul 20, 4:54 PM EDT | Severe Thunderstorm Warning | BGM | Chenango, Cortland, Madison, Oneida, Otsego | 66 min |
| Jul 20, 4:57 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 48 min |
| Jul 20, 4:59 PM EDT | Severe Thunderstorm Warning | BOX | Hillsborough | 31 min |
| Jul 20, 5:21 PM EDT | Severe Thunderstorm Warning | ALY | Fulton, Herkimer, Montgomery | 24 min |
| Jul 20, 5:25 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 20 min |
| Jul 20, 5:25 PM EDT | Severe Thunderstorm Warning | ALY | Albany, Rensselaer, Saratoga, Schenectady, Washington | 50 min |
| Jul 20, 5:41 PM EDT | Severe Thunderstorm Warning | BGM | Delaware, Otsego | 64 min |
| Jul 20, 5:45 PM EDT | Severe Thunderstorm Warning | ALY | Fulton, Montgomery, Schenectady, Schoharie | 30 min |
| Jul 20, 6:17 PM EDT | Severe Thunderstorm Warning | ALY | Albany, Greene, Schoharie | 58 min |
| Jul 20, 6:20 PM EDT | Severe Thunderstorm Warning | ALY | Washington | 55 min |
| Jul 20, 6:46 PM EDT | Severe Thunderstorm Warning | ALY | Bennington, Windham | 44 min |
| Jul 20, 7:14 PM EDT | Severe Thunderstorm Warning | BOX | Cheshire | 46 min |
| Jul 20, 7:29 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 21 min |
| Jul 20, 7:29 PM EDT | Severe Thunderstorm Warning | ALY | Windham | 31 min |
| Jul 20, 7:56 PM EDT | Severe Thunderstorm Warning | BOX | Cheshire, Hillsborough | 40 min |
| Jul 20, 8:14 PM EDT | Severe Thunderstorm Warning | ALY | Windham | 46 min |
| Jul 20, 8:21 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 39 min |
| Jul 20, 8:30 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 45 min |
| Jul 20, 8:58 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Middlesex, Worcester | 47 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, 6.2 hours before the alert went out and 56 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
- 237 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 906 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 7:27 PM EDT | Mesoscale Discussion | SPC | 63 min | |
| Jul 20, 12:53 PM EDT | Mesoscale Discussion | SPC | Berkshire, Franklin, Hampden, Hampshire, Worcester | 2 hr |
| Jul 20, 4:28 PM EDT | Mesoscale Discussion | SPC | Berkshire, Franklin, Hampshire, Middlesex, Worcester | 2 hr |
| Jul 20, 12:35 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Cattaraugus, Chautauqua, Chemung, Erie, Genesee and 7 more | 7 hr |
| Jul 20, 11:29 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 8 more | 61 min |
Nearby
Severe Thunderstorm Watches in New York, 2008Severe Thunderstorm Watches in Massachusetts, 2008Severe Thunderstorm Watches in Pennsylvania, 2008Every severe thunderstorm watch in 2008
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.