Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 82, NWS Gray, ME

July 13, 2020Carroll County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 13, 2020, 8:01 PM EDT for Carroll County, New Hampshire. It was in force for 44 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 13, 2020, 8:01 PM EDT (00:01 UTC)
Expired: Jul 13, 2020, 8:45 PM EDT
In force: 44 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Carroll County, NH

The radar

The Portland,ME radar (KGYX), 76 km from the middle of the area, began a volume at 00:02 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

Gray, ME (KGYX), launched 00:00Z, 0.0 hours before the alert went out and 76 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: 290 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1063 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 13, 7:12 PM EDT, 49 minutes earlier.

Area forecast discussion, Jul 13, 7:12 PM EDT, 49 minutes before

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Hazardous weather outlook, Jul 13, 3:21 PM EDT, 4 hours 40 minutes before

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In the hours before

Special weather statement, Jul 13, 6:19 PM EDT, 1 hour 42 minutes before

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Special weather statement, Jul 13, 6:35 PM EDT, 1 hour 26 minutes before

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Special weather statement, Jul 13, 6:39 PM EDT, 1 hour 22 minutes before

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Special weather statement, Jul 13, 7:07 PM EDT, 54 minutes before

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Special weather statement, Jul 13, 7:47 PM EDT, 14 minutes before

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Special weather statement, Jul 13, 7:58 PM EDT, 3 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 13, 8:22 PM EDT	Special Weather Statement	GYX	Oxford	38 min
Jul 13, 9:07 PM EDT	Special Weather Statement	GYX	Oxford	38 min
Jul 14, 8:21 AM EDT	Special Weather Statement	GYX	York	39 min
Jul 14, 8:32 AM EDT	Severe Thunderstorm Warning	GYX	York	43 min
Jul 14, 8:59 AM EDT	Special Weather Statement	GYX	Oxford	61 min
Jul 14, 9:02 AM EDT	Areal Flood Advisory	GYX	York	2 hr
Jul 14, 9:12 AM EDT	Severe Thunderstorm Warning	GYX	York	48 min
Jul 14, 9:37 AM EDT	Severe Thunderstorm Warning	GYX	York	38 min
Jul 14, 9:54 AM EDT	Special Marine Warning	GYX		66 min
Jul 14, 9:56 AM EDT	Special Weather Statement	GYX	Oxford	64 min
Jul 14, 10:03 AM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	42 min
Jul 14, 10:05 AM EDT	Areal Flood Advisory	GYX	Androscoggin, Cumberland, Oxford	3 hr
Jul 14, 10:43 AM EDT	Special Weather Statement	GYX	Cumberland	62 min
Jul 14, 11:13 AM EDT	Areal Flood Advisory	GYX	Androscoggin, Cumberland, Oxford	3 hr
Jul 14, 11:17 AM EDT	Areal Flood Advisory	GYX	Androscoggin, Franklin, Oxford	3 hr
Jul 14, 11:38 AM EDT	Special Weather Statement	GYX	Androscoggin	37 min
Jul 14, 12:11 PM EDT	Areal Flood Advisory	GYX	Androscoggin, Cumberland, Kennebec, Sagadahoc	3 hr
Jul 14, 12:52 PM EDT	Special Weather Statement	GYX	Lincoln	23 min
Jul 14, 1:15 PM EDT	Special Weather Statement	GYX	Lincoln	30 min
Jul 14, 1:18 PM EDT	Special Weather Statement	GYX	Cumberland	42 min
Jul 14, 1:49 PM EDT	Flash Flood Warning	GYX	Cumberland	2 hr
Jul 14, 2:02 PM EDT	Areal Flood Advisory	GYX	Lincoln	3 hr
Jul 14, 2:19 PM EDT	Flash Flood Warning	GYX	Knox, Lincoln	3 hr
Jul 14, 5:27 PM EDT	Areal Flood Advisory	GYX	Franklin, Kennebec, Knox, Lincoln, Somerset, Waldo	2 hr
Jul 14, 7:15 PM EDT	Flash Flood Warning	GYX	Kennebec, Knox, Lincoln, Waldo	104 min
Jul 13, 8:44 PM EDT	Special Weather Statement	GYX	Carroll	46 min
Jul 13, 9:03 PM EDT	Special Weather Statement	GYX	Sullivan	42 min
Jul 14, 3:53 AM EDT	Special Weather Statement	GYX	Sullivan	37 min
Jul 14, 4:19 AM EDT	Severe Thunderstorm Warning	GYX	Grafton, Sullivan	41 min
Jul 14, 4:54 AM EDT	Severe Thunderstorm Warning	GYX	Grafton	51 min
Jul 14, 5:18 AM EDT	Special Weather Statement	GYX	Sullivan	27 min
Jul 14, 5:26 AM EDT	Areal Flood Advisory	GYX	Grafton, Merrimack, Sullivan	3 hr
Jul 14, 5:52 AM EDT	Special Weather Statement	GYX	Grafton, Merrimack	38 min
Jul 14, 6:30 AM EDT	Special Weather Statement	GYX	Grafton, Merrimack	45 min
Jul 14, 6:46 AM EDT	Flash Flood Warning	GYX	Grafton	3 hr
Jul 14, 7:06 AM EDT	Special Weather Statement	GYX	Belknap, Carroll, Merrimack	39 min
Jul 14, 7:40 AM EDT	Special Weather Statement	GYX	Belknap, Carroll, Hillsborough, Rockingham, Strafford	35 min
Jul 14, 7:53 AM EDT	Flash Flood Warning	GYX	Belknap, Carroll, Coos, Grafton	3 hr
Jul 14, 8:14 AM EDT	Flash Flood Warning	GYX	Carroll, Coos, Grafton	5 hr
Jul 14, 11:17 AM EDT	Special Weather Statement	GYX	Cheshire	58 min
Jul 14, 11:49 AM EDT	Severe Thunderstorm Warning	GYX	Cheshire	41 min
Jul 14, 12:20 PM EDT	Special Weather Statement	GYX	Cheshire	25 min
Jul 14, 3:01 PM EDT	Special Weather Statement	GYX	Hillsborough	44 min
Jul 14, 3:06 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Rockingham	39 min
Jul 14, 3:52 PM EDT	Special Weather Statement	GYX	Rockingham	38 min
Jul 14, 4:30 PM EDT	Special Weather Statement	GYX	Rockingham	45 min
Jul 14, 4:56 PM EDT	Flash Flood Warning	GYX	Rockingham	3 hr
Jul 14, 5:07 PM EDT	Special Weather Statement	GYX	Rockingham	38 min
Jul 14, 5:52 PM EDT	Special Weather Statement	GYX	Hillsborough	38 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2020 Every severe thunderstorm warning in 2020

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.