Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 68, NWS Gray, ME
NWS Gray, ME issued this severe thunderstorm warning at Aug 3, 2018, 3:15 PM EDT for Cheshire County, Merrimack County, Sullivan County, New Hampshire. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 3, 2018, 3:15 PM EDT (19:15 UTC)
- Expired
- Aug 3, 2018, 4:00 PM EDT
- In force
- 45 min
- Issued by
- NWS Gray, ME
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cheshire County, NH, Merrimack County, NH, Sullivan County, NH
The radar
The Boston radar (KBOX), 157 km from the middle of the area, began a volume at 19:17 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 nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 7.3 hours before the alert went out and 155 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
- 98 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 716 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Gray, ME wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 3, 9:04 AM EDT, 6 hours 11 minutes earlier.
Area forecast discussion, Aug 3, 9:04 AM EDT, 6 hours 11 minutes before
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</html>Hazardous weather outlook, Aug 3, 2:59 PM EDT, 16 minutes before
Hazardous Weather Outlook National Weather Service Gray ME 259 PM EDT Fri Aug 3 2018 MEZ023-NHZ010-012>014-041900- Coastal York-Strafford-Eastern Hillsborough-Interior Rockingham- Coastal Rockingham- 259 PM EDT Fri Aug 3 2018 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING... This Hazardous Weather Outlook is for southwest Maine, central New Hampshire and southern New Hampshire. .DAY ONE...This Afternoon and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Expect scattered showers and thunderstorms today and tonight as a frontal boundary approaches the region. The thunderstorms could damaging winds and locally heavy downpours. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. The scattered showers and thunderstorms will continue Saturday into Sat night as an upper trof moves into the region. The thunderstorms could produce heavy downpours and lead to localized flash flooding. Fair weather but very warm and humid conditions remain Sunday into early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MEZ009-013-014-018>022-024>028-041900- Central Somerset-Southern Franklin-Southern Somerset-Interior York- Interior Cumberland-Androscoggin-Kennebec-Interior Waldo- Coastal Cumberland-Sagadahoc-Lincoln-Knox-Coastal Waldo- 259 PM EDT Fri Aug 3 2018 This Hazardous Weather Outlook is for Maine, south central Maine, southwest Maine, west central Maine and western Maine. .DAY ONE...This Afternoon and Tonight. Expect scattered showers and thunderstorms today and tonight as a frontal boundary approaches the region. The thunderstorms could produce damaging winds and locally heavy downpours. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. The scattered showers and thunderstorms will continue Saturday into Sat night as an upper trof moves into the region. The thunderstorms could produce heavy downpours and lead to localized flash flooding. Fair weather but very warm and humid conditions remain Sunday into early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MEZ007-008-012-NHZ001>009-011-015-041900- Northern Oxford-Northern Franklin-Southern Oxford-Northern Coos- Southern Coos-Northern Grafton-Northern Carroll-Southern Grafton- Southern Carroll-Sullivan-Merrimack-Belknap-Cheshire- Western And Central Hillsborough- 259 PM EDT Fri Aug 3 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY AFTERNOON... This Hazardous Weather Outlook is for western Maine, New Hampshire, central New Hampshire, northern New Hampshire and southern New Hampshire. .DAY ONE...This Afternoon and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Expect scattered showers and thunderstorms today and tonight as a frontal boundary approaches the region. The thunderstorms could produce damaging winds and locally heavy downpours. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. The scattered showers and thunderstorms will continue Saturday into Sat night as an upper trof moves into the region. The thunderstorms could produce heavy downpours and lead to localized flash flooding. Fair weather but very warm and humid conditions remain Sunday into early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ150>154-041900- Coastal Waters from Stonington, ME to Port Clyde, ME out 25 NM- Penobscot Bay- Coastal Waters from Port Clyde, ME to Cape Elizabeth, ME out 25 NM- Casco Bay- Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM- 259 PM EDT Fri Aug 3 2018 This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...This Afternoon and Tonight. Scattered thunderstorms will move through the waters this evening. Some thunderstorms may contain damaging winds. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Aug 3, 10:48 AM EDT, 4 hours 27 minutes before
Special Weather Statement
National Weather Service Gray ME
1048 AM EDT FRI AUG 3 2018
NHZ011-031545-
Cheshire-
1048 AM EDT FRI AUG 3 2018
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CHESHIRE COUNTY...
At 1048 AM EDT, a strong thunderstorm was located near Newfane, or
near Brattleboro, moving east at 30 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Keene, Winchester, Dublin, Harrisville, Nelson, Gilsum, Marlow,
Roxbury, Sullivan, Alstead, Westmoreland, Swanzey, Surry,
Chesterfield, Walpole, Marlborough, Hinsdale and East Putney Station.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4292 7252 4295 7253 4297 7248 4300 7246
4300 7244 4305 7247 4308 7243 4317 7216
4313 7218 4313 7205 4310 7204 4302 7206
4294 7206 4294 7201 4293 7200 4283 7255
4287 7256
TIME...MOT...LOC 1448Z 251DEG 26KT 4293 7262
mleSpecial weather statement, Aug 3, 11:44 AM EDT, 3 hours 31 minutes before
Special Weather Statement National Weather Service Gray ME 1144 AM EDT FRI AUG 3 2018 NHZ007-008-011-012-015-031630- Merrimack-Western And Central Hillsborough-Cheshire-Eastern Hillsborough-Sullivan- 1144 AM EDT FRI AUG 3 2018 ...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN CHESHIRE... NORTHWESTERN HILLSBOROUGH AND SOUTH CENTRAL MERRIMACK COUNTIES... At 1143 AM EDT, a strong thunderstorm was located over Nelson, or 12 miles northeast of Keene, moving east at 40 mph. Winds in excess of 30 mph are possible with this storm. Locations impacted include... Manchester, Concord, Henniker, Bedford, Hooksett, Peterborough, Hopkinton, New Boston, Antrim, Greenfield, Lyndeborough, Dublin, Francestown, Bennington, Harrisville, Nelson, Windsor, Hancock, Goffstown and Deering. This includes the following highways... Interstate 293 between mile markers 5 and 6, and near mile marker 9. Interstate 89 between mile markers 2 and 11. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. LAT...LON 4288 7213 4309 7222 4325 7159 4297 7146 TIME...MOT...LOC 1543Z 249DEG 35KT 4302 7207 mle
Special weather statement, Aug 3, 1:01 PM EDT, 2 hours 14 minutes before
Special Weather Statement
National Weather Service Gray ME
101 PM EDT FRI AUG 3 2018
NHZ008>010-012-013-031745-
Merrimack-Belknap-Strafford-Interior Rockingham-Eastern Hillsborough-
101 PM EDT FRI AUG 3 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN ROCKINGHAM...
SOUTHWESTERN STRAFFORD...NORTHEASTERN HILLSBOROUGH AND SOUTHEASTERN
MERRIMACK COUNTIES...
At 101 PM EDT, a strong thunderstorm was located over Hooksett, or 7
miles north of Manchester, moving east at 30 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Manchester, Concord, Northwood, Hooksett, Barrington, Epping,
Barnstead, Epsom, Raymond, Goffstown, Bow, Lee, Allenstown,
Deerfield, Candia, Dunbarton, Chichester, Nottingham, Pembroke and
Strafford.
This includes the following highways...
Interstate 293 between mile markers 8 and 11.
Interstate 89 near mile marker 0.
Interstate 93 between mile markers 23 and 35.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4307 7152 4306 7156 4314 7160 4332 7120
4306 7102 4300 7150
TIME...MOT...LOC 1701Z 247DEG 27KT 4308 7147
mleSpecial weather statement, Aug 3, 1:34 PM EDT, 1 hour 41 minutes before
Special Weather Statement National Weather Service Gray ME 134 PM EDT FRI AUG 3 2018 MEZ018-023-NHZ010-013-014-031815- Interior York-Coastal York-Strafford-Coastal Rockingham-Interior Rockingham- 134 PM EDT FRI AUG 3 2018 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN YORK...NORTHERN ROCKINGHAM AND SOUTHERN STRAFFORD COUNTIES... At 134 PM EDT, a strong thunderstorm was located near Raymond, or near Northwood, moving east at 35 mph. Winds in excess of 40 mph are possible with this storm. Locations impacted include... Rochester, Durham, Kittery, Northwood, Dover, Somersworth, Barrington, Berwick, Epping, Lebanon, South Berwick, Raymond, Newington, Newmarket, Eliot, Lee, Fremont, Deerfield, Candia and Madbury. This includes Interstate 95 near mile marker 3. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. LAT...LON 4300 7120 4316 7130 4339 7090 4312 7072 TIME...MOT...LOC 1734Z 247DEG 29KT 4311 7117
Special weather statement, Aug 3, 2:12 PM EDT, 1 hour 3 minutes before
Special Weather Statement National Weather Service Gray ME 212 PM EDT FRI AUG 3 2018 MEZ018-023-NHZ010-013-014-031900- Interior York-Coastal York-Strafford-Coastal Rockingham-Interior Rockingham- 212 PM EDT FRI AUG 3 2018 ...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL YORK...EAST CENTRAL ROCKINGHAM AND SOUTHEASTERN STRAFFORD COUNTIES... At 212 PM EDT, a strong thunderstorm was located over Durham, moving east at 20 mph. Winds in excess of 40 mph are possible with this storm. Locations impacted include... Portsmouth, Durham, Kittery, Dover, Somersworth, Berwick, Greenland, South Berwick, York, Newington, Newmarket, Wells, Eliot, Madbury, Ogunquit, New Castle and Rollinsford. This includes the following highways... Interstate 95 between mile markers 1 and 19. Interstate 95 in New Hampshire between mile markers 14 and 16. This also includes... York Beach. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. LAT...LON 4306 7092 4321 7094 4333 7061 4308 7052 TIME...MOT...LOC 1812Z 252DEG 18KT 4313 7088
Special weather statement, Aug 3, 3:01 PM EDT, 14 minutes before
Special Weather Statement
National Weather Service Gray ME
301 PM EDT FRI AUG 3 2018
NHZ007-008-011-031945-
Merrimack-Cheshire-Sullivan-
301 PM EDT FRI AUG 3 2018
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN SULLIVAN...
WESTERN CHESHIRE AND WEST CENTRAL MERRIMACK COUNTIES...
At 301 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 6 miles southwest of Newport to near
Brattleboro. Movement was east at 40 mph.
Winds in excess of 40 mph are possible with these storms.
Locations impacted include...
Keene, Claremont, Bellows Falls, New London, Charlestown, Winchester,
Bradford, Richmond, Nelson, Newport, Gilsum, Walpole, Alstead,
Westmoreland, Swanzey, Hinsdale, Marlow, Sullivan, Surry and
Chesterfield.
This includes Interstate 89 between mile markers 28 and 33.
This also includes...
Mount Sunapee.
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4292 7252 4295 7253 4297 7248 4300 7246
4300 7244 4305 7247 4308 7244 4312 7243
4314 7246 4323 7243 4325 7244 4328 7241
4332 7240 4345 7186 4279 7233 4279 7252
4281 7254 4287 7256
TIME...MOT...LOC 1901Z 253DEG 36KT 4329 7225 4287 7269The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 8:56 AM EDT | Heat Advisory | GYX | York | 10 hr |
| Aug 3, 2:12 PM EDT | Special Weather Statement | GYX | York | 48 min |
| Aug 3, 2:50 PM EDT | Flash Flood Watch | GYX | Franklin, Oxford, Somerset | 23 hr |
| Aug 3, 4:07 PM EDT | Severe Thunderstorm Warning | GYX | York | 38 min |
| Aug 3, 4:40 PM EDT | Special Weather Statement | GYX | Sagadahoc | 35 min |
| Aug 3, 5:24 PM EDT | Severe Thunderstorm Warning | GYX | Cumberland, York | 66 min |
| Aug 3, 5:40 PM EDT | Flash Flood Warning | GYX | York | 118 min |
| Aug 3, 5:44 PM EDT | Special Weather Statement | GYX | Cumberland | 31 min |
| Aug 3, 5:48 PM EDT | Areal Flood Advisory | GYX | Cumberland, York | 3 hr |
| Aug 3, 5:48 PM EDT | Severe Thunderstorm Warning | GYX | York | 42 min |
| Aug 3, 5:59 PM EDT | Flash Flood Warning | GYX | Cumberland, York | 2 hr |
| Aug 3, 6:09 PM EDT | Special Marine Warning | GYX | 66 min | |
| Aug 3, 10:48 AM EDT | Special Weather Statement | GYX | Cheshire | 57 min |
| Aug 3, 11:44 AM EDT | Special Weather Statement | GYX | Hillsborough | 46 min |
| Aug 3, 1:01 PM EDT | Special Weather Statement | GYX | Rockingham | 44 min |
| Aug 3, 1:34 PM EDT | Special Weather Statement | GYX | Strafford | 41 min |
| Aug 3, 1:41 PM EDT | Severe Thunderstorm Warning | GYX | Rockingham, Strafford | 32 min |
| Aug 3, 3:01 PM EDT | Special Weather Statement | GYX | Cheshire, Sullivan | 44 min |
| Aug 3, 3:20 PM EDT | Tornado Warning | GYX | Cheshire | 40 min |
| Aug 3, 3:25 PM EDT | Flash Flood Warning | GYX | Cheshire, Grafton, Hillsborough, Merrimack, Sullivan | 4 hr |
| Aug 3, 3:37 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Merrimack | 38 min |
| Aug 3, 3:47 PM EDT | Tornado Warning | GYX | Merrimack | 28 min |
| Aug 3, 3:57 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire | 48 min |
| Aug 3, 4:00 PM EDT | Special Weather Statement | GYX | Rockingham | 30 min |
| Aug 3, 4:08 PM EDT | Flash Flood Warning | GYX | Belknap, Merrimack | 3 hr |
| Aug 3, 4:13 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Merrimack | 47 min |
| Aug 3, 4:22 PM EDT | Areal Flood Advisory | GYX | Hillsborough, Merrimack, Rockingham, Strafford | 113 min |
| Aug 3, 4:31 PM EDT | Severe Thunderstorm Warning | GYX | Hillsborough, Merrimack, Rockingham, Strafford | 20 min |
| Aug 3, 4:43 PM EDT | Special Weather Statement | GYX | Cheshire | 47 min |
| Aug 3, 4:49 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll, Merrimack, Rockingham, Strafford | 41 min |
| Aug 3, 5:12 PM EDT | Severe Thunderstorm Warning | GYX | Hillsborough, Merrimack, Rockingham | 43 min |
| Aug 3, 5:26 PM EDT | Tornado Warning | GYX | Rockingham, Strafford | 34 min |
| Aug 3, 5:36 PM EDT | Flash Flood Warning | GYX | Hillsborough, Merrimack, Rockingham | 3 hr |
| Aug 3, 6:28 PM EDT | Areal Flood Advisory | GYX | Cheshire, Hillsborough | 3 hr |
| Aug 3, 7:17 PM EDT | Special Weather Statement | GYX | Rockingham | 28 min |
Nearby
Severe Thunderstorm Warnings in New Hampshire, 2018Every severe thunderstorm warning in 2018
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.