Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 28, NWS Gray, ME

July 29, 20234 counties in New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 29, 2023, 2:11 PM EDT for 4 counties in New Hampshire. It was in force for 39 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
Jul 29, 2023, 2:11 PM EDT (18:11 UTC)
Expired
Jul 29, 2023, 2:50 PM EDT
In force
39 min
Issued by
NWS Gray, ME
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH

The radar

The Portland,ME radar (KGYX), 124 km from the middle of the area, began a volume at 18:14 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 29, 1:33 PM EDTSevere Thunderstorm WatchSPC7 hr

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 Jul 29, 9:58 AM EDT, 4 hours 13 minutes earlier.

Area forecast discussion, Jul 29, 9:58 AM EDT, 4 hours 13 minutes before
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Hazardous weather outlook, Jul 29, 7:48 AM EDT, 6 hours 23 minutes before
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In the hours before

Special weather statement, Jul 29, 1:29 PM EDT, 42 minutes before
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Special weather statement, Jul 29, 1:57 PM EDT, 14 minutes before
Special Weather Statement
National Weather Service Gray ME
157 PM EDT Sat Jul 29 2023

NHZ008-012-013-015-291845-
Merrimack NH-Western And Central Hillsborough NH-
Interior Rockingham NH-Eastern Hillsborough NH-
157 PM EDT Sat Jul 29 2023

...A strong thunderstorm will impact portions of northwestern
Rockingham, east central Hillsborough and southeastern Merrimack
Counties through 245 PM EDT...

At 157 PM EDT, Doppler radar was tracking a strong thunderstorm over
Bedford, or near Manchester, moving northeast at 25 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Manchester, Derry, Merrimack, Bedford, Hooksett, Amherst, Litchfield,
New Boston, Epsom, Raymond, Goffstown, Londonderry, Auburn, Chester,
Allenstown, Fremont, Deerfield, Candia and Sandown.

This includes the following highways...
 Interstate 293 between mile markers 1 and 11.
 Interstate 93 between mile markers 15 and 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
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.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern and central New Hampshire.

&&

LAT...LON 4286 7155 4296 7168 4320 7132 4297 7112
TIME...MOT...LOC 1757Z 234DEG 15KT 4294 7152

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Cempa
Special weather statement, Jul 29, 1:58 PM EDT, 13 minutes before
Special Weather Statement
National Weather Service Gray ME
158 PM EDT Sat Jul 29 2023

MEZ012-019-033-291900-
Southern Oxford ME-Interior Cumberland Highlands ME-
Central Interior Cumberland ME-
158 PM EDT Sat Jul 29 2023

...A strong thunderstorm will impact portions of south central Oxford
and west central Cumberland Counties through 300 PM EDT...

At 158 PM EDT, Doppler radar was tracking a strong thunderstorm near
Hiram, or 10 miles south of Fryeburg, moving east at 15 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Bridgton, Naples, Hiram, Raymond, Standish, Casco, Brownfield,
Denmark, Frye Island, Sebago, Baldwin and Porter.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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.

If on or near Sebago and Long Lake, get out of the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
10 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4386 7095 4393 7094 4401 7053 4383 7054
TIME...MOT...LOC 1758Z 266DEG 14KT 4391 7086

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Tubbs

The office that day

Everything else NWS Gray, ME issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 29, 7:34 AM EDTFlood WatchGYXAndroscoggin, Cumberland, Kennebec, Oxford, Sagadahoc, York14 hr
Jul 29, 1:31 PM EDTSevere Thunderstorm WarningGYXOxford30 min
Jul 29, 1:58 PM EDTSpecial Weather StatementGYXCumberland62 min
Jul 29, 2:42 PM EDTSpecial Weather StatementGYXCumberland33 min
Jul 29, 3:00 PM EDTFlash Flood WarningGYXCumberland, York5 hr
Jul 29, 3:54 PM EDTSmall Craft AdvisoryGYX16 hr
Jul 29, 5:03 PM EDTFlash Flood WarningGYXOxford3 hr
Jul 29, 5:07 PM EDTFlash Flood WarningGYXCumberland3 hr
Jul 29, 5:30 PM EDTFlash Flood WarningGYXAndroscoggin, Cumberland, Sagadahoc6 hr
Jul 29, 6:33 PM EDTAreal Flood AdvisoryGYXKennebec, Lincoln, Sagadahoc6 hr
Jul 29, 7:56 PM EDTAreal Flood AdvisoryGYXOxford2 hr
Jul 29, 1:29 PM EDTSpecial Weather StatementGYXCarroll31 min
Jul 29, 1:57 PM EDTSpecial Weather StatementGYXRockingham48 min
Jul 29, 2:40 PM EDTSpecial Weather StatementGYXMerrimack35 min
Jul 29, 2:42 PM EDTAreal Flood AdvisoryGYXCheshire, Merrimack, Sullivan2 hr
Jul 29, 3:25 PM EDTFlash Flood WarningGYXMerrimack5 hr
Jul 29, 3:25 PM EDTSpecial Weather StatementGYXBelknap35 min
Jul 29, 3:54 PM EDTAreal Flood AdvisoryGYXBelknap, Carroll, Merrimack, Strafford5 hr
Jul 29, 4:26 PM EDTFlash Flood WarningGYXBelknap, Carroll, Strafford4 hr
Jul 29, 5:19 PM EDTFlash Flood WarningGYXCheshire2 hr
Jul 29, 7:04 PM EDTAreal Flood AdvisoryGYXHillsborough, Rockingham3 hr

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2023Every severe thunderstorm warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.