Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 209, NWS Gray, ME

August 30, 2007Coos County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Aug 30, 2007, 3:27 PM EDT for Coos County, New Hampshire. 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, 3:27 PM EDT (19:27 UTC)
Expired: Aug 30, 2007, 4:15 PM EDT
In force: 48 min
Issued by: NWS Gray, ME
Area: Counties, with a storm outline in the text

County Coos County, NH

The radar

The Portland,ME radar (KGYX), 122 km from the middle of the area, began a volume at 19:30 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 30, 3:07 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 7.5 hours before the alert went out and 122 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 Gray, ME wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 30, 2:58 PM EDT, 29 minutes earlier.

Area forecast discussion, Aug 30, 2:58 PM EDT, 29 minutes before

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Hazardous weather outlook, Aug 30, 9:50 AM EDT, 5 hours 37 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAY ME
950 AM EDT THU AUG 30 2007

MEZ007>009-012>014-NHZ001>007-311400-
NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD-
SOUTHERN FRANKLIN-SOUTHERN SOMERSET-NORTHERN COOS-SOUTHERN COOS-
NORTHERN GRAFTON-NORTHERN CARROLL-SOUTHERN GRAFTON-SOUTHERN CARROLL-
SULLIVAN-
950 AM EDT THU AUG 30 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW
HAMPSHIRE AND NORTHERN NEW HAMPSHIRE.

.DAY ONE...TODAY AND TONIGHT

A FEW THUNDERSTORMS MAY PRODUCE GUSTY WINDS AND HAIL LATER THIS
MORNING INTO THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED FOR THIS AFTERNOON.

ANZ150-MEZ018>028-NHZ008>010-013-014-311400-
STONINGTON ME TO MERRIMACK RIVER MA OUT TO 25 NM-INTERIOR YORK-
INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC-INTERIOR WALDO-
COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN-KNOX-COASTAL WALDO-
MERRIMACK-BELKNAP-STRAFFORD-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM-
950 AM EDT THU AUG 30 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW
HAMPSHIRE...SOUTHEASTERN NEW HAMPSHIRE AND THE COASTAL WATERS FROM
STONINGTON ME TO THE MERRIMACK RIVER MA.

.DAY ONE...TODAY AND TONIGHT

A THUNDERSTORM OR TWO MAY PRODUCE GUSTY WINDS AND SMALL HAIL LATER
THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON.

HAYES

In the hours before

Special weather statement, Aug 30, 12:12 PM EDT, 3 hours 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
1212 PM EDT THU AUG 30 2007

MEZ008-009-301700-
CENTRAL SOMERSET-NORTHERN FRANKLIN-
1212 PM EDT THU AUG 30 2007

...STRONG THUNDERSTORMS WILL IMPACT SOMERSET COUNTY AND FRANKLIN
COUNTY THROUGH 100 PM EDT...

AT 1212 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 11 MILES SOUTHWEST OF FLAGSTAFF
LAKE...MOVING EAST AT 35 MPH. THIS STRONG THUNDERSTORM WILL AFFECT
FLAGSTAFF LAKE...CARATUNK...THE FORKS AND LAKE MOXIE THROUGH 100 PM
EDT.

HAIL UP TO ONE HALF INCH IN DIAMETER...HEAVY DOWNPOURS...VIVID AND
FREQUENT CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS TO 55 MPH CAN
BE EXPECTED.

HAYES/MICHAUD

Special weather statement, Aug 30, 12:44 PM EDT, 2 hours 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
1244 PM EDT THU AUG 30 2007

MEZ008-301730-
NORTHERN FRANKLIN-
1244 PM EDT THU AUG 30 2007

...STRONG THUNDERSTORMS WILL IMPACT FRANKLIN COUNTY THROUGH 130 PM
EDT...

AT 1244 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED OVER SALEM. THIS STRONG THUNDERSTORM
WILL AFFECT AREAS IN AND AROUND SALEM AND KINGFIELD THROUGH 130 PM
EDT.

HAIL UP TO ONE HALF INCH IN DIAMETER...HEAVY DOWNPOURS...FREQUENT
CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS TO 45 MPH CAN BE EXPECTED.

HAYES

Local storm report, Aug 30, 1:15 PM EDT, 2 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAY ME
115 PM EDT THU AUG 30 2007

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

1239 PM     TSTM WND DMG     3 S THE FORKS           45.29N 69.97W
08/30/2007                   SOMERSET           ME   PUBLIC

            LARGE TREE DOWN ACROSS ROUTE 201 3 MILES SOUTH OF THE
            WEST FORKS.

&&

KIRKA

Special weather statement, Aug 30, 2:18 PM EDT, 1 hour 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
218 PM EDT THU AUG 30 2007

NHZ002-003-301900-
NORTHERN GRAFTON-SOUTHERN COOS-
218 PM EDT THU AUG 30 2007

...STRONG THUNDERSTORMS WILL IMPACT GRAFTON COUNTY AND COOS COUNTY
THROUGH 300 PM EDT...

AT 218 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 8 MILES WEST OF LITTLETON...MOVING
EAST AT 30 MPH. THIS STRONG THUNDERSTORM WILL AFFECT  LITTLETON...
BETHLEHEM...WHITEFIELD...LANCASTER...JEFFERSON...YORK POND...
SHELBURNE...RANDOLPH...GORHAM AND BERLIN THROUGH 300 PM EDT.

HAIL UP TO ONE HALF INCH IN DIAMETER...HEAVY DOWNPOURS...FREQUENT
CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS TO 45 MPH CAN BE EXPECTED.

HAYES

Special weather statement, Aug 30, 2:32 PM EDT, 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
232 PM EDT THU AUG 30 2007

NHZ003-301915-
NORTHERN GRAFTON-
232 PM EDT THU AUG 30 2007

...STRONG THUNDERSTORMS WILL IMPACT GRAFTON COUNTY THROUGH 315 PM
EDT...

AT 232 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 6 MILES WEST OF WOODSVILLE...MOVING EAST
AT 30 MPH. THIS STRONG THUNDERSTORM WILL AFFECT  WOODSVILLE...
BATH...BENTON...LANDAFF CENTER...LISBON...EASTON...SUGAR HILL...
FRANCONIA...LITTLETON AND BETHLEHEM THROUGH 315 PM EDT.

HAIL UP TO ONE HALF INCH IN DIAMETER...HEAVY DOWNPOURS...FREQUENT
CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS TO 45 MPH CAN BE EXPECTED.

HAYES/MICHAUD

Special weather statement, Aug 30, 3:10 PM EDT, 17 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 30, 12:17 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	43 min
Aug 30, 3:39 PM EDT	Severe Thunderstorm Warning	GYX	Franklin	66 min
Aug 30, 3:56 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	64 min
Aug 30, 4:39 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec	66 min
Aug 30, 4:56 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	64 min
Aug 30, 5:03 PM EDT	Severe Thunderstorm Warning	GYX	Franklin	42 min
Aug 30, 5:08 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	52 min
Aug 30, 5:10 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	50 min
Aug 30, 5:25 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin	50 min
Aug 30, 5:55 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	35 min
Aug 30, 6:09 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	36 min
Aug 30, 2:47 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	58 min
Aug 30, 3:40 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	65 min
Aug 30, 4:55 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	65 min
Aug 30, 5:08 PM EDT	Severe Thunderstorm Warning	GYX	Sullivan	52 min
Aug 30, 6:14 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	46 min
Aug 30, 6:29 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack	46 min
Aug 30, 6:35 PM EDT	Severe Thunderstorm Warning	GYX	Sullivan	40 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 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.