Alert archive / Maine / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 73, NWS Gray, ME

July 27, 2009Somerset County, Maine

NWS Gray, ME issued this severe thunderstorm warning at Jul 27, 2009, 4:43 AM EDT for Somerset County, Maine. It was in force for 32 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 27, 2009, 4:43 AM EDT (08:43 UTC)
Expired: Jul 27, 2009, 5:15 AM EDT
In force: 32 min
Issued by: NWS Gray, ME
Area: Storm-based polygon

County Somerset County, ME

The radar

The Caribou radar (KCBW), 177 km from the middle of the area, began a volume at 08:46 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

Caribou, ME (KCAR), launched 00:00Z, 8.7 hours before the alert went out and 213 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: 164 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 586 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

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 27, 3:12 AM EDT, 1 hour 31 minutes earlier.

Area forecast discussion, Jul 27, 3:12 AM EDT, 1 hour 31 minutes before

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Hazardous weather outlook, Jul 27, 3:03 AM EDT, 1 hour 40 minutes before

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In the hours before

Special weather statement, Jul 27, 4:02 AM EDT, 41 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 27, 4:19 AM EDT	Severe Thunderstorm Warning	GYX	Somerset	41 min
Jul 27, 8:26 AM EDT	Special Marine Warning	GYX		64 min
Jul 27, 2:38 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	37 min
Jul 27, 3:07 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	38 min
Jul 27, 3:38 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	37 min
Jul 27, 3:52 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	38 min
Jul 27, 3:59 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	33 min
Jul 27, 4:11 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec, Oxford	34 min
Jul 27, 4:51 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	39 min
Jul 27, 5:31 PM EDT	Areal Flood Advisory	GYX	Androscoggin, Kennebec	3 hr
Jul 27, 6:03 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Knox, Lincoln, Sagadahoc	57 min
Jul 27, 12:57 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	33 min
Jul 27, 2:15 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Sullivan	45 min
Jul 27, 3:15 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	45 min
Jul 27, 3:40 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack	35 min

Nearby

Severe Thunderstorm Warnings in Maine, 2009 Every severe thunderstorm warning in 2009

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.