Alert archive / Maine / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 87, NWS Caribou, ME

August 30, 2007Penobscot County, Piscataquis County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Aug 30, 2007, 1:27 PM EDT for Penobscot County, Piscataquis County, Maine. It was in force for 48 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 30, 2007, 1:27 PM EDT (17:27 UTC)
Expired: Aug 30, 2007, 2:15 PM EDT
In force: 48 min
Issued by: NWS Caribou, ME
Area: Counties, with a storm outline in the text

Counties Penobscot County, ME, Piscataquis County, ME

The radar

The Caribou radar (KCBW), 101 km from the middle of the area, began a volume at 17:30 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, 5.5 hours before the alert went out and 218 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: 106 J/kg
Mixed-layer CIN: -343 J/kg
Mixed-layer LCL: 1254 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 54 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 Caribou, ME wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 30, 12:17 PM EDT, 1 hour 10 minutes earlier.

Area forecast discussion, Aug 30, 12:17 PM EDT, 1 hour 10 minutes before

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Hazardous weather outlook, Aug 30, 12:28 PM EDT, 59 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CARIBOU ME
1228 PM EDT THU AUG 30 2007

ANZ050-MEZ001>006-010-011-015>017-029>032-311100-
COASTAL WATERS FROM EASTPORT ME TO STONINGTON ME OUT 25 NM-
NORTHWEST AROOSTOOK-NORTHEAST AROOSTOOK-NORTHERN SOMERSET-
NORTHERN PISCATAQUIS-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK-
CENTRAL PISCATAQUIS-CENTRAL PENOBSCOT-SOUTHERN PENOBSCOT-
INTERIOR HANCOCK-CENTRAL WASHINGTON-COASTAL HANCOCK-
COASTAL WASHINGTON-SOUTHERN PISCATAQUIS-NORTHERN WASHINGTON-
1228 PM EDT THU AUG 30 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL
WATERS...EAST CENTRAL MAINE...NORTH CENTRAL MAINE...NORTHERN
MAINE...SOUTHEAST MAINE AND WEST CENTRAL MAINE.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS WILL DEVELOP ALONG...AND TO THE SOUTH OF...A COLD
FRONT MOVING SLOWLY SOUTHEAST ACROSS THE REGION THIS AFTERNOON.
THERE IS A CHANCE SOME OF THESE THUNDERSTORMS COULD BECOME STRONG
TO POSSIBLY SEVERE WITH STRONG WINDS AND HAIL. THE BEST CHANCE FOR
STRONG TO POSSIBLY SEVERE THUNDERSTORMS THIS AFTERNOON WILL BE
SOUTH OF A LINE FROM GREENVILLE...TO MILLINOCKET...TO DANFORTH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION COULD BE REQUIRED THIS AFTERNOON.

NORCROSS

In the hours before

Local storm report, Aug 30, 1:22 PM EDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
122 PM EDT THU AUG 30 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1258 PM     TSTM WND DMG     GREENVILLE              45.46N 69.59W
08/30/2007                   PISCATAQUIS        ME   LAW ENFORCEMENT

            TREES AND POWER LINES BLOWN DOWN

&&

STUREY

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 12:39 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	66 min
Aug 30, 6:17 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	43 min
Aug 30, 6:57 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	33 min

Nearby

Severe Thunderstorm Warnings in Maine, 2007 Every severe thunderstorm warning in 2007

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.