Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 79, NWS Gray, ME

July 20, 2013Coos County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 20, 2013, 2:20 PM EDT for Coos County, New Hampshire. It was in force for 55 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 20, 2013, 2:20 PM EDT (18:20 UTC)
Expired: Jul 20, 2013, 3:15 PM EDT
In force: 55 min
Issued by: NWS Gray, ME
Area: Storm-based polygon

County Coos County, NH

The radar

The Portland,ME radar (KGYX), 122 km from the middle of the area, began a volume at 18:21 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

Albany, NY (KALY), launched 12:00Z, 6.3 hours before the alert went out and 301 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: 18 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 1465 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 159 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 20, 10:54 AM EDT, 3 hours 26 minutes earlier.

Area forecast discussion, Jul 20, 10:54 AM EDT, 3 hours 26 minutes before

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Hazardous weather outlook, Jul 20, 3:33 AM EDT, 10 hours 47 minutes before

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In the hours before

Local storm report, Jul 20, 12:41 PM EDT, 1 hour 39 minutes before

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Local storm report, Jul 20, 12:59 PM EDT, 1 hour 21 minutes before

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Local storm report, Jul 20, 1:21 PM EDT, 59 minutes before

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Local storm report, Jul 20, 2:01 PM EDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAY ME
201 PM EDT SAT JUL 20 2013

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

0955 PM     TSTM WND DMG     MADISON                 44.80N  69.88W
07/19/2013                   SOMERSET           ME   LAW ENFORCEMENT

            MULTIPLE TREES DOWN IN MADISON REPORTED BY SHERIIFS
            OFFICE

&&

CORRECTED EVENT TIME

EVENT NUMBER GYX1300247

MPK

Special weather statement, Jul 20, 2:04 PM EDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
204 PM EDT SAT JUL 20 2013

NHZ013-014-201830-
COASTAL ROCKINGHAM-INTERIOR ROCKINGHAM-
204 PM EDT SAT JUL 20 2013

...STRONG THUNDERSTORMS WILL IMPACT ROCKINGHAM COUNTY THROUGH 230 PM
EDT...

AT 204 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORM OVER SOUTHERN ROCKINGHAM COUNTY. THE
STRONGEST STORM WAS CENTERED 2 MILES SOUTHWEST OF NEWTON...OR ABOUT
8 MILES WEST OF NEWBURYPORT...MOVING EAST AT 40 MPH. THIS STRONG
THUNDERSTORM WILL AFFECT AREAS IN AND AROUND KINGSTON STATE
PARK...EAST HAMPSTEAD...PLAISTOW...KINGSTON...DANVILLE...
ATKINSON...NEWTON...EAST  KINGSTON...SOUTH HAMPTON AND KENSINGTON
THROUGH 230 PM EDT.

GUSTY WINDS OF 35 TO 45 MPH CAN BE EXPECTED.

LAT...LON 4281 7111 4281 7116 4291 7119 4302 7073
      4299 7074 4294 7078 4287 7082 4286 7086
      4288 7092 4286 7097 4285 7103 4280 7107

KIMBLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 8:12 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	33 min
Jul 19, 8:15 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	45 min
Jul 19, 8:56 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Oxford, Somerset	34 min
Jul 19, 9:26 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Knox, Lincoln, Oxford and 2 more	49 min
Jul 19, 9:44 PM EDT	Severe Thunderstorm Warning	GYX	Oxford, York	46 min
Jul 19, 9:55 PM EDT	Special Weather Statement	GYX	Androscoggin	50 min
Jul 19, 10:13 PM EDT	Special Weather Statement	GYX	Waldo	62 min
Jul 20, 12:27 AM EDT	Special Weather Statement	GYX	Cumberland	48 min
Jul 20, 2:30 PM EDT	Special Marine Warning	GYX		90 min
Jul 20, 3:07 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	53 min
Jul 20, 3:22 PM EDT	Special Marine Warning	GYX		53 min
Jul 20, 3:46 PM EDT	Special Weather Statement	GYX	Waldo	29 min
Jul 20, 4:05 PM EDT	Special Weather Statement	GYX	Kennebec	40 min
Jul 20, 4:36 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Knox, Lincoln, Somerset and 1 more	54 min
Jul 20, 5:21 PM EDT	Severe Thunderstorm Warning	GYX	Knox, Lincoln, Waldo	24 min
Jul 20, 5:27 PM EDT	Special Marine Warning	GYX		63 min
Jul 19, 8:37 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos, Grafton	23 min
Jul 19, 9:03 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Coos, Grafton	42 min
Jul 19, 10:53 PM EDT	Special Weather Statement	GYX	Sullivan	52 min
Jul 19, 11:06 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Sullivan	39 min
Jul 19, 11:17 PM EDT	Areal Flood Advisory	GYX	Merrimack, Sullivan	118 min
Jul 19, 11:39 PM EDT	Special Weather Statement	GYX	Belknap, Merrimack, Strafford	66 min
Jul 19, 11:51 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Rockingham, Strafford	39 min
Jul 20, 12:03 AM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Merrimack, Strafford	42 min
Jul 20, 2:04 PM EDT	Special Weather Statement	GYX	Rockingham	26 min
Jul 20, 3:32 PM EDT	Special Weather Statement	GYX	Coos	28 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 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.