Alert archive / Maine / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 82, NWS Gray, ME

August 9, 2018Kennebec County, Somerset County, Waldo County, Maine

NWS Gray, ME issued this severe thunderstorm warning at Aug 9, 2018, 5:17 PM EDT for Kennebec County, Somerset County, Waldo County, Maine. It was in force for 43 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 9, 2018, 5:17 PM EDT (21:17 UTC)
Expired: Aug 9, 2018, 6:00 PM EDT
In force: 43 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kennebec County, ME, Somerset County, ME, Waldo County, ME

The radar

The Portland,ME radar (KGYX), 113 km from the middle of the area, began a volume at 21:21 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, 9.3 hours before the alert went out and 114 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: 385 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 899 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 Aug 9, 3:37 PM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Aug 9, 3:37 PM EDT, 1 hour 40 minutes before

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Hazardous weather outlook, Aug 9, 3:00 PM EDT, 2 hours 17 minutes before

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In the hours before

Special weather statement, Aug 9, 11:26 AM EDT, 5 hours 51 minutes before

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Special weather statement, Aug 9, 11:57 AM EDT, 5 hours 20 minutes before

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Special weather statement, Aug 9, 12:25 PM EDT, 4 hours 52 minutes before

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Special weather statement, Aug 9, 1:36 PM EDT, 3 hours 41 minutes before

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Special weather statement, Aug 9, 5:07 PM EDT, 10 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
Aug 8, 8:06 PM EDT	Areal Flood Advisory	GYX	Oxford	114 min
Aug 8, 8:43 PM EDT	Flash Flood Warning	GYX	Oxford	81 min
Aug 9, 11:26 AM EDT	Special Weather Statement	GYX	Kennebec	34 min
Aug 9, 11:57 AM EDT	Special Weather Statement	GYX	Kennebec	63 min
Aug 9, 12:03 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	27 min
Aug 9, 12:25 PM EDT	Special Weather Statement	GYX	Kennebec, Waldo	65 min
Aug 9, 1:36 PM EDT	Special Weather Statement	GYX	Knox, Waldo	54 min
Aug 9, 5:07 PM EDT	Special Weather Statement	GYX	Waldo	38 min
Aug 8, 8:29 PM EDT	Flash Flood Warning	GYX	Belknap, Hillsborough, Merrimack, Rockingham, Strafford	95 min

Nearby

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.