Alert archive / New Hampshire / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 452
The Storm Prediction Center issued this severe thunderstorm watch at Jul 28, 2014, 2:07 PM EDT for 7 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2014, 2:07 PM EDT (18:07 UTC)
- Expired
- Jul 28, 2014, 9:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 39 counties
Capitol Planning Region, CT, Northeastern Connecticut 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, Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Oxford County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Columbia County, NY, Rensselaer County, NY, Washington County, NY, Providence County, RI, Addison County, VT, Bennington County, VT, Caledonia County, VT, Essex County, VT, Orange County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT
The radar
The Boston radar (KBOX), 155 km from the middle of the area, began a volume at 18:08 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
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 2:24 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll, Strafford | 51 min |
| Jul 28, 2:28 PM EDT | Flash Flood Warning | ALY | Berkshire | 4 hr |
| Jul 28, 3:07 PM EDT | Severe Thunderstorm Warning | GYX | Cumberland, Oxford, York | 38 min |
| Jul 28, 3:18 PM EDT | Flash Flood Warning | GYX | Belknap, Carroll, Grafton | 3 hr |
| Jul 28, 3:30 PM EDT | Flash Flood Warning | BTV | Windsor | 4 hr |
| Jul 28, 3:35 PM EDT | Flash Flood Warning | ALY | Windham | 6 hr |
| Jul 28, 3:46 PM EDT | Severe Thunderstorm Warning | GYX | Cumberland, York | 44 min |
| Jul 28, 3:51 PM EDT | Tornado Warning | GYX | Cumberland, York | 24 min |
| Jul 28, 3:58 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 62 min |
| Jul 28, 4:00 PM EDT | Severe Thunderstorm Warning | BOX | 47 min | |
| Jul 28, 4:04 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Grafton, Merrimack, Sullivan | 41 min |
| Jul 28, 4:17 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 43 min |
| Jul 28, 4:24 PM EDT | Tornado Warning | BOX | Hampden, Worcester | 21 min |
| Jul 28, 4:40 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll, Grafton | 50 min |
| Jul 28, 5:14 PM EDT | Severe Thunderstorm Warning | BOX | Hillsborough | 16 min |
| Jul 28, 5:19 PM EDT | Severe Thunderstorm Warning | GYX | Merrimack, Rockingham, Strafford | 41 min |
| Jul 28, 5:21 PM EDT | Severe Thunderstorm Warning | GYX | Cumberland, Oxford, York | 39 min |
| Jul 28, 5:47 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 58 min |
| Jul 28, 5:48 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 34 min |
| Jul 28, 6:02 PM EDT | Flash Flood Warning | GYX | Belknap, Carroll, Grafton | 3 hr |
| Jul 28, 6:16 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 41 min |
| Jul 28, 6:22 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 23 min |
| Jul 28, 6:23 PM EDT | Severe Thunderstorm Warning | GYX | Cumberland, York | 52 min |
| Jul 28, 6:25 PM EDT | Severe Thunderstorm Warning | GYX | Androscoggin, Cumberland, Oxford | 50 min |
| Jul 28, 6:35 PM EDT | Severe Thunderstorm Warning | GYX | York | 40 min |
| Jul 28, 6:42 PM EDT | Severe Thunderstorm Warning | GYX | Cumberland, Oxford, York | 38 min |
| Jul 28, 6:56 PM EDT | Flash Flood Warning | GYX | Cumberland, Oxford | 3 hr |
| Jul 28, 7:10 PM EDT | Severe Thunderstorm Warning | GYX | Androscoggin, Franklin, Kennebec, Oxford | 50 min |
| Jul 28, 7:36 PM EDT | Severe Thunderstorm Warning | GYX | Androscoggin, Cumberland, Kennebec, Oxford, Sagadahoc, York | 39 min |
| Jul 28, 7:54 PM EDT | Severe Thunderstorm Warning | GYX | Androscoggin, Franklin, Kennebec, Oxford, Somerset | 36 min |
| Jul 28, 8:16 PM EDT | Severe Thunderstorm Warning | GYX | Androscoggin, Cumberland, Kennebec, Lincoln, Sagadahoc | 44 min |
| Jul 28, 8:32 PM EDT | Flash Flood Warning | GYX | Androscoggin, Franklin, Kennebec, Oxford | 88 min |
| Jul 28, 8:40 PM EDT | Severe Thunderstorm Warning | GYX | Androscoggin, Kennebec, Somerset | 50 min |
| Jul 28, 8:41 PM EDT | Flash Flood Warning | ALY | Windham | 6 hr |
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, 6.1 hours before the alert went out and 144 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
- 76 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 552 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 1:37 PM EDT | Mesoscale Discussion | SPC | 53 min | |
| Jul 28, 7:38 PM EDT | Mesoscale Discussion | SPC | 97 min | |
| Jul 28, 4:24 AM EDT | Mesoscale Discussion | SPC | Suffolk | 2 hr |
Nearby
Severe Thunderstorm Watches in New Hampshire, 2014Severe Thunderstorm Watches in Massachusetts, 2014Severe Thunderstorm Watches in Vermont, 2014Every severe thunderstorm watch in 2014
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.