Alert archive / Maine / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 55, NWS Gray, ME

July 4, 2013Oxford County, Maine

NWS Gray, ME issued this severe thunderstorm warning at Jul 4, 2013, 4:28 PM EDT for Oxford County, Maine. It was in force for 47 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 4, 2013, 4:28 PM EDT (20:28 UTC)
Expired: Jul 4, 2013, 5:15 PM EDT
In force: 47 min
Issued by: NWS Gray, ME
Area: Storm-based polygon

County Oxford County, ME

The radar

The Portland,ME radar (KGYX), 79 km from the middle of the area, began a volume at 20:31 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, 8.5 hours before the alert went out and 79 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: 132 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1157 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 16 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 4, 3:02 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Jul 4, 3:02 PM EDT, 1 hour 26 minutes before

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Hazardous weather outlook, Jul 4, 9:55 AM EDT, 6 hours 33 minutes before

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In the hours before

Special weather statement, Jul 4, 4:10 PM EDT, 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
410 PM EDT THU JUL 4 2013

NHZ002-003-042045-
NORTHERN GRAFTON-SOUTHERN COOS-
410 PM EDT THU JUL 4 2013

...STRONG THUNDERSTORMS WILL IMPACT COOS COUNTY AND GRAFTON COUNTY
THROUGH 445 PM EDT...

AT 410 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 7 MILES NORTHWEST OF LITTLETON...MOVING
NORTHEAST AT 15 MPH. THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN
AND AROUND LITTLETON...FOREST LAKE STATE PARK...DALTON...WHITEFIELD
AND LANCASTER THROUGH 445 PM EDT.

HAIL UP TO THREE QUARTER INCH IN DIAMETER...HEAVY DOWNPOURS...
EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH
CAN BE EXPECTED.

IF YOU ARE OUTDOORS AND STORMS APPROACH YOUR LOCATION...MOVE INDOORS
OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE MORE THAN 5
MILES AWAY FROM THE PARENT THUNDERSTORM.

LAT...LON 4435 7192 4434 7186 4435 7183 4441 7179
      4442 7170 4447 7165 4449 7161 4453 7159
      4437 7149 4426 7192 4434 7197

MBC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 4:54 PM EDT	Special Weather Statement	GYX	Oxford	36 min
Jul 4, 4:58 PM EDT	Special Weather Statement	GYX	Oxford	47 min
Jul 4, 5:02 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Oxford	43 min
Jul 4, 5:11 PM EDT	Areal Flood Advisory	GYX	Androscoggin, Oxford	3 hr
Jul 4, 5:39 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec, Oxford, Sagadahoc	36 min
Jul 4, 5:43 PM EDT	Special Weather Statement	GYX	Oxford	32 min
Jul 4, 6:13 PM EDT	Special Weather Statement	GYX	Androscoggin, Kennebec	32 min
Jul 4, 6:22 PM EDT	Special Weather Statement	GYX	Kennebec	23 min
Jul 4, 6:50 PM EDT	Special Weather Statement	GYX	Waldo	25 min
Jul 4, 6:51 PM EDT	Special Weather Statement	GYX	Sagadahoc	24 min
Jul 4, 7:12 PM EDT	Special Weather Statement	GYX	Lincoln	33 min
Jul 3, 11:05 PM EDT	Special Weather Statement	GYX	Grafton	55 min
Jul 4, 6:55 PM EDT	Special Weather Statement	GYX	Grafton	50 min
Jul 4, 4:10 PM EDT	Special Weather Statement	GYX	Caledonia	35 min

Nearby

Severe Thunderstorm Warnings in Maine, 2013 Every severe thunderstorm warning in 2013

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.