Alert archive / Maine / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 80, NWS Gray, ME

July 13, 2020Oxford County, Maine; Coos County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 13, 2020, 4:07 PM EDT for Oxford County, Maine; Coos County, New Hampshire. It was in force for 38 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, 4:07 PM EDT (20:07 UTC)
Expired: Jul 13, 2020, 4:45 PM EDT
In force: 38 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Oxford County, ME, Coos County, NH

The radar

The Portland,ME radar (KGYX), 100 km from the middle of the area, began a volume at 20:07 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 12:00Z, 8.1 hours before the alert went out and 100 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: 17 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1349 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 49 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 13, 4:03 PM EDT, 4 minutes earlier.

Area forecast discussion, Jul 13, 4:03 PM EDT, 4 minutes before

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Hazardous weather outlook, Jul 13, 3:21 PM EDT, 46 minutes before

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In the hours before

Special weather statement, Jul 13, 3:10 PM EDT, 57 minutes before

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Local storm report, Jul 13, 3:17 PM EDT, 50 minutes before

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Special weather statement, Jul 13, 3:19 PM EDT, 48 minutes before

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Special weather statement, Jul 13, 3:41 PM EDT, 26 minutes before

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Special weather statement, Jul 13, 3:57 PM EDT, 10 minutes before

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Special weather statement, Jul 13, 3:58 PM EDT, 9 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, 1:37 PM EDT	Special Weather Statement	GYX	York	23 min
Jul 13, 1:56 PM EDT	Special Weather Statement	GYX	Somerset	49 min
Jul 13, 1:58 PM EDT	Special Weather Statement	GYX	York	47 min
Jul 13, 2:17 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	58 min
Jul 13, 2:18 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	21 min
Jul 13, 2:36 PM EDT	Special Marine Warning	GYX		54 min
Jul 13, 2:38 PM EDT	Severe Thunderstorm Warning	GYX	York	52 min
Jul 13, 3:10 PM EDT	Special Weather Statement	GYX	York	35 min
Jul 13, 3:14 PM EDT	Special Marine Warning	GYX		91 min
Jul 13, 3:19 PM EDT	Special Weather Statement	GYX	Oxford	41 min
Jul 13, 3:41 PM EDT	Special Weather Statement	GYX	Oxford	49 min
Jul 13, 3:57 PM EDT	Special Weather Statement	GYX	Oxford	48 min
Jul 13, 3:58 PM EDT	Special Weather Statement	GYX	Kennebec	47 min
Jul 13, 4:38 PM EDT	Special Weather Statement	GYX	Oxford	37 min
Jul 13, 4:42 PM EDT	Flash Flood Warning	GYX	Androscoggin, Franklin, Kennebec, Oxford, Somerset	110 min
Jul 13, 5:03 PM EDT	Special Weather Statement	GYX	Kennebec	27 min
Jul 13, 6:17 PM EDT	Special Weather Statement	GYX	Kennebec	28 min
Jul 13, 6:24 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford, York	51 min
Jul 13, 12:34 PM EDT	Special Weather Statement	GYX	Merrimack	41 min
Jul 13, 12:49 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Merrimack	30 min
Jul 13, 12:54 PM EDT	Flash Flood Warning	GYX	Hillsborough, Merrimack	110 min
Jul 13, 1:31 PM EDT	Special Weather Statement	GYX	Strafford	44 min
Jul 13, 1:48 PM EDT	Special Weather Statement	GYX	Rockingham	57 min
Jul 13, 2:29 PM EDT	Special Weather Statement	GYX	Rockingham	46 min
Jul 13, 3:03 PM EDT	Special Weather Statement	GYX	Coos	57 min
Jul 13, 5:47 PM EDT	Special Weather Statement	GYX	Hillsborough	28 min
Jul 13, 5:52 PM EDT	Special Weather Statement	GYX	Grafton	23 min
Jul 13, 6:19 PM EDT	Special Weather Statement	GYX	Carroll	26 min
Jul 13, 6:35 PM EDT	Special Weather Statement	GYX	Grafton	25 min
Jul 13, 6:39 PM EDT	Special Weather Statement	GYX	Carroll	36 min
Jul 13, 7:07 PM EDT	Special Weather Statement	GYX	Carroll	53 min
Jul 13, 7:37 PM EDT	Flash Flood Warning	GYX	Belknap, Carroll, Grafton	3 hr
Jul 13, 7:47 PM EDT	Special Weather Statement	GYX	Carroll	43 min
Jul 13, 7:58 PM EDT	Special Weather Statement	GYX	Carroll	47 min

Nearby

Severe Thunderstorm Warnings in Maine, 2020 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.