Alert archive / New Hampshire / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 457
The Storm Prediction Center issued this severe thunderstorm watch at Jun 20, 2001, 2:30 PM EDT for 5 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 20, 2001, 2:30 PM EDT (18:30 UTC)
- Expired
- Jun 20, 2001, 9:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
Counties Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex 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, Columbia County, NY, Dutchess County, NY, Orange County, NY, Putnam County, NY, Windham County, VT
The radar
The Albany radar (KENX), 109 km from the middle of the area, began a volume at 18:34 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.
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 3:04 PM EDT | Severe Thunderstorm Warning | ALY | Columbia, Greene | 71 min |
| Jun 20, 3:26 PM EDT | Severe Thunderstorm Warning | BOX | Cheshire | 49 min |
| Jun 20, 3:33 PM EDT | Severe Thunderstorm Warning | BOX | Hillsborough | 42 min |
| Jun 20, 3:36 PM EDT | Severe Thunderstorm Warning | GYX | Merrimack, Rockingham | 54 min |
| Jun 20, 4:10 PM EDT | Severe Thunderstorm Warning | ALY | Columbia | 65 min |
| Jun 20, 4:12 PM EDT | Severe Thunderstorm Warning | GYX | Rockingham | 48 min |
| Jun 20, 4:14 PM EDT | Severe Thunderstorm Warning | BOX | Hillsborough | 46 min |
| Jun 20, 4:18 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 72 min |
| Jun 20, 4:32 PM EDT | Severe Thunderstorm Warning | OKX | Orange | 43 min |
| Jun 20, 4:35 PM EDT | Severe Thunderstorm Warning | GYX | Strafford | 55 min |
| Jun 20, 4:57 PM EDT | Severe Thunderstorm Warning | GYX | York | 63 min |
| Jun 20, 5:08 PM EDT | Severe Thunderstorm Warning | GYX | Rockingham | 37 min |
| Jun 20, 5:17 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 43 min |
| Jun 20, 5:17 PM EDT | Severe Thunderstorm Warning | ALY | Windham | 58 min |
| Jun 20, 6:00 PM EDT | Severe Thunderstorm Warning | BOX | Hampshire | 45 min |
| Jun 20, 6:11 PM EDT | Severe Thunderstorm Warning | ALY | Dutchess | 49 min |
| Jun 20, 6:23 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 52 min |
| Jun 20, 6:24 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 51 min |
| Jun 20, 6:42 PM EDT | Severe Thunderstorm Warning | OKX | Putnam, Westchester | 48 min |
| Jun 20, 7:13 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 47 min |
| Jun 20, 7:37 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 38 min |
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 6.5 hours before the alert went out and 97 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
- 226 J/kg
- Mixed-layer CIN
- -207 J/kg
- Mixed-layer LCL
- 1047 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 5:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr | |
| Jun 20, 1:15 PM EDT | Severe Thunderstorm Watch | SPC | Albany, Broome, Chenango, Delaware, Greene, Montgomery and 7 more | 5 hr |
Nearby
Severe Thunderstorm Watches in New Hampshire, 2001Severe Thunderstorm Watches in Connecticut, 2001Severe Thunderstorm Watches in Massachusetts, 2001Every severe thunderstorm watch in 2001
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.