Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 30, NWS Gray, ME

July 15, 2018York County, Maine; Belknap County, Carroll County, Strafford County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 15, 2018, 2:18 PM EDT for York County, Maine; Belknap County, Carroll County, Strafford County, New Hampshire. It was in force for 37 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 15, 2018, 2:18 PM EDT (18:18 UTC)
Expired: Jul 15, 2018, 2:55 PM EDT
In force: 37 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties York County, ME, Belknap County, NH, Carroll County, NH, Strafford County, NH

The radar

The Portland,ME radar (KGYX), 78 km from the middle of the area, began a volume at 18:19 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

Chatham, MA (KCHH), launched 12:00Z, 6.3 hours before the alert went out and 226 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1028 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 15, 11:50 AM EDT, 2 hours 28 minutes earlier.

Area forecast discussion, Jul 15, 11:50 AM EDT, 2 hours 28 minutes before

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Hazardous weather outlook, Jul 15, 4:05 AM EDT, 10 hours 13 minutes before

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In the hours before

Special weather statement, Jul 15, 9:55 AM EDT, 4 hours 23 minutes before

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Special weather statement, Jul 15, 10:30 AM EDT, 3 hours 48 minutes before

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Special weather statement, Jul 15, 11:08 AM EDT, 3 hours 10 minutes before

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Special weather statement, Jul 15, 11:42 AM EDT, 2 hours 36 minutes before

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Special weather statement, Jul 15, 1:14 PM EDT, 1 hour 4 minutes before

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Special weather statement, Jul 15, 2:00 PM EDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 3:14 AM EDT	Beach Hazards Statement	GYX	Knox, Waldo	17 hr
Jul 15, 7:14 AM EDT	Special Weather Statement	GYX	Somerset	61 min
Jul 15, 8:03 AM EDT	Special Weather Statement	GYX	Franklin	57 min
Jul 15, 8:15 AM EDT	Special Weather Statement	GYX	Somerset	60 min
Jul 15, 8:58 AM EDT	Special Weather Statement	GYX	Franklin	77 min
Jul 15, 9:12 AM EDT	Special Weather Statement	GYX	Somerset	33 min
Jul 15, 9:55 AM EDT	Special Weather Statement	GYX	Franklin	65 min
Jul 15, 10:30 AM EDT	Special Weather Statement	GYX	Franklin	45 min
Jul 15, 11:08 AM EDT	Special Weather Statement	GYX	Oxford	37 min
Jul 15, 11:42 AM EDT	Special Weather Statement	GYX	Androscoggin, Kennebec, Oxford	48 min
Jul 15, 3:46 PM EDT	Special Weather Statement	GYX	Somerset	29 min
Jul 15, 4:11 PM EDT	Special Weather Statement	GYX	Somerset	49 min
Jul 15, 1:14 PM EDT	Special Weather Statement	GYX	Belknap	46 min
Jul 15, 2:00 PM EDT	Special Weather Statement	GYX	Belknap	30 min
Jul 15, 2:53 PM EDT	Special Weather Statement	GYX	Merrimack	37 min
Jul 15, 3:26 PM EDT	Special Weather Statement	GYX	Rockingham	34 min
Jul 15, 3:34 PM EDT	Special Weather Statement	GYX	Hillsborough	26 min
Jul 15, 3:52 PM EDT	Special Weather Statement	GYX	Cheshire	23 min
Jul 15, 4:02 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Merrimack	43 min
Jul 15, 4:42 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Merrimack, Rockingham	48 min
Jul 15, 6:34 PM EDT	Special Weather Statement	GYX	Cheshire	26 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2018 Severe Thunderstorm Warnings in Maine, 2018 Every 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.