Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 116, NWS Gray, ME

September 11, 20135 counties in New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Sep 11, 2013, 9:03 PM EDT for 5 counties in New Hampshire. It was in force for 57 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: Sep 11, 2013, 9:03 PM EDT (01:03 UTC)
Expired: Sep 11, 2013, 10:00 PM EDT
In force: 57 min
Issued by: NWS Gray, ME
Area: Storm-based polygon

Counties Belknap County, NH, Carroll County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH

The radar

The Portland,ME radar (KGYX), 99 km from the middle of the area, began a volume at 01:05 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
Sep 11, 2:33 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Gray, ME (KGYX), launched 00:00Z, 1.1 hours before the alert went out and 98 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: 1951 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1620 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 6.5

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 Sep 11, 8:14 PM EDT, 49 minutes earlier.

Area forecast discussion, Sep 11, 8:14 PM EDT, 49 minutes before

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Hazardous weather outlook, Sep 11, 7:50 PM EDT, 1 hour 13 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAY ME
750 PM EDT WED SEP 11 2013

MEZ007>009-012>014-020>022-028-NHZ001>009-130000-
NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD-
SOUTHERN FRANKLIN-SOUTHERN SOMERSET-ANDROSCOGGIN-KENNEBEC-
INTERIOR WALDO-COASTAL WALDO-NORTHERN COOS-SOUTHERN COOS-
NORTHERN GRAFTON-NORTHERN CARROLL-SOUTHERN GRAFTON-SOUTHERN CARROLL-
SULLIVAN-MERRIMACK-BELKNAP-
750 PM EDT WED SEP 11 2013

...SEVERE THUNDERSTORM WATCH 521 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

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

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

SEVERE THUNDERSTORMS WILL BE POSSIBLE DURING THE DAY ON THURSDAY.
MAIN THREATS WILL BE DAMAGING WINDS...HAIL...AND HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.  SPOTTERS ARE
ENCOURAGED TO CALL OR RADIO IN THEIR REPORTS.

MEZ018-019-023>027-NHZ010-013-014-130000-
INTERIOR YORK-INTERIOR CUMBERLAND-COASTAL YORK-COASTAL CUMBERLAND-
SAGADAHOC-LINCOLN-KNOX-STRAFFORD-INTERIOR ROCKINGHAM-
COASTAL ROCKINGHAM-
750 PM EDT WED SEP 11 2013

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

.DAY ONE...TONIGHT.

STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS EVENING.
MAIN THREATS WILL BE DAMAGING WINDS...HAIL...AND HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

SEVERE THUNDERSTORMS WILL BE POSSIBLE DURING THE DAY ON THURSDAY.
MAIN THREATS WILL BE DAMAGING WINDS...HAIL...AND HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.  SPOTTERS ARE
ENCOURAGED TO CALL OR RADIO IN THEIR REPORTS.

ANZ150>154-130000-
STONINGTON ME TO PORT CLYDE ME OUT TO 25 NM-PENOBSCOT BAY-
PORT CLYDE ME TO CAPE ELIZABETH ME OUT TO 25 NM-CASCO BAY-
CAPE ELIZABETH ME TO MERRIMACK RIVER MA OUT TO 25 NM-
750 PM EDT WED SEP 11 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CASCO BAY...PENOBSCOT
BAY...THE COASTAL WATERS FROM CAPE ELIZABETH ME TO MERRIMACK RIVER
MA...THE COASTAL WATERS FROM PORT CLYDE ME TO CAPE ELIZABETH ME AND
THE COASTAL WATERS FROM STONINGTON ME TO PORT CLYDE ME.

.DAY ONE...TONIGHT.

STRONG STORMS WILL GUSTY WINDS WILL BE POSSIBLE ON THE WATERS THIS
EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

STRONG TO LOCALLY SEVERE STORMS WILL BE POSSIBLE THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.  SPOTTERS ARE
ENCOURAGED TO CALL OR RADIO IN THEIR REPORTS.

In the hours before

Local storm report, Sep 11, 7:45 PM EDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GRAY ME
745 PM EDT WED SEP 11 2013

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

0510 PM     TSTM WND DMG     JEFFERSON               44.42N  71.47W
09/11/2013                   COOS               NH   FIRE DEPT/RESCUE

            LARGE BRANCHES AND WIRES DOWN

0510 PM     TSTM WND DMG     3 ESE JEFFERSON         44.40N  71.43W
09/11/2013                   COOS               NH   AMATEUR RADIO

            WIRES DOWN ON US 2. TREES DOWN ON STAG HOLLOW RD.

0535 PM     HAIL             RANDOLPH                44.38N  71.28W
09/11/2013  E0.75 INCH       COOS               NH   TRAINED SPOTTER

0540 PM     TSTM WND DMG     STRATFORD               44.66N  71.56W
09/11/2013                   COOS               NH   FIRE DEPT/RESCUE

            TREES AND POWER LINES DOWN

0545 PM     TSTM WND DMG     3 N EASTON              44.19N  71.79W
09/11/2013                   GRAFTON            NH   STATE POLICE

            TREES DOWN

0555 PM     TSTM WND DMG     BETHLEHEM               44.28N  71.69W
09/11/2013                   GRAFTON            NH   STATE POLICE

            TREES DOWN

0612 PM     TSTM WND DMG     HAVERHILL               44.03N  72.06W
09/11/2013                   GRAFTON            NH   LAW ENFORCEMENT

            TREES DOWN

0635 PM     TSTM WND DMG     LINCOLN                 44.05N  71.67W
09/11/2013                   GRAFTON            NH   LAW ENFORCEMENT

            TREES DOWN ON THE KANCAMANGUS AND TREES ON WIRES ON
            CHURCH ROAD IN LINCOLN

0720 PM     TSTM WND DMG     FRYEBURG                44.02N  70.98W
09/11/2013                   OXFORD             ME   LAW ENFORCEMENT

            TREE DOWN ON FISH STREET IN FRYEBURG

&&

EVENT NUMBER GYX1300303 GYX1300308 GYX1300304 GYX1300306 GYX1300307
GYX1300305 GYX1300311 GYX1300309 GYX1300310

MLE

Local storm report, Sep 11, 8:26 PM EDT, 37 minutes before

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Local storm report, Sep 11, 8:39 PM EDT, 24 minutes before

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Local storm report, Sep 11, 8:49 PM EDT, 14 minutes before

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Special weather statement, Sep 11, 8:52 PM EDT, 11 minutes before

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Local storm report, Sep 11, 9:02 PM EDT, 1 minute 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
Sep 11, 8:13 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec, Lincoln, Sagadahoc	47 min
Sep 11, 8:36 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Knox, Lincoln, Waldo	54 min
Sep 11, 8:52 PM EDT	Special Weather Statement	GYX	Cumberland	23 min
Sep 11, 8:55 PM EDT	Special Marine Warning	GYX		95 min
Sep 11, 8:57 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	48 min
Sep 11, 9:08 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	37 min
Sep 11, 9:45 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford, York	45 min
Sep 11, 9:48 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Lincoln, Sagadahoc	57 min
Sep 11, 9:57 PM EDT	Special Marine Warning	GYX		93 min
Sep 11, 10:04 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Kennebec, Oxford, Sagadahoc, York	56 min
Sep 11, 10:19 PM EDT	Special Marine Warning	GYX		86 min
Sep 11, 11:17 PM EDT	Special Weather Statement	GYX	Franklin	28 min
Sep 11, 11:21 PM EDT	Special Marine Warning	GYX		24 min
Sep 11, 11:41 PM EDT	Special Marine Warning	GYX		64 min
Sep 12, 5:55 AM EDT	Special Weather Statement	GYX	Oxford	65 min
Sep 12, 11:20 AM EDT	Special Weather Statement	GYX	York	55 min
Sep 12, 11:48 AM EDT	Special Weather Statement	GYX	Androscoggin, Cumberland	57 min
Sep 12, 12:12 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Kennebec, Sagadahoc	63 min
Sep 12, 12:51 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Knox, Lincoln, Sagadahoc	54 min
Sep 12, 12:55 PM EDT	Special Marine Warning	GYX		65 min
Sep 12, 12:57 PM EDT	Special Marine Warning	GYX		93 min
Sep 12, 12:59 PM EDT	Severe Thunderstorm Warning	GYX	York	46 min
Sep 12, 1:26 PM EDT	Special Weather Statement	GYX	Knox, Lincoln	64 min
Sep 12, 1:35 PM EDT	Severe Thunderstorm Warning	GYX	Knox, Lincoln, Waldo	55 min
Sep 12, 2:41 PM EDT	Areal Flood Advisory	GYX	York	3 hr
Sep 12, 2:50 PM EDT	Special Weather Statement	GYX	York	25 min
Sep 12, 3:07 PM EDT	Flash Flood Watch	GYX	Androscoggin, Cumberland, Franklin, Kennebec, Knox, Lincoln and 5 more	12 hr
Sep 12, 3:41 PM EDT	Special Weather Statement	GYX	Cumberland	34 min
Sep 12, 3:47 PM EDT	Severe Thunderstorm Warning	GYX	York	43 min
Sep 12, 3:51 PM EDT	Special Marine Warning	GYX		84 min
Sep 12, 3:57 PM EDT	Special Weather Statement	GYX	Androscoggin, Cumberland, Sagadahoc	63 min
Sep 12, 4:31 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	44 min
Sep 12, 5:09 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	51 min
Sep 12, 5:46 PM EDT	Areal Flood Advisory	GYX	Franklin, Oxford, Somerset	119 min
Sep 12, 6:02 PM EDT	Flash Flood Warning	GYX	Franklin, Oxford	3 hr
Sep 12, 6:24 PM EDT	Special Weather Statement	GYX	Kennebec, Oxford	66 min
Sep 11, 8:08 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Grafton, Sullivan	67 min
Sep 11, 9:22 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Merrimack, Rockingham, Strafford	53 min
Sep 11, 9:44 PM EDT	Areal Flood Advisory	GYX	Grafton	91 min
Sep 12, 4:53 AM EDT	Special Weather Statement	GYX	Coos	52 min
Sep 12, 10:45 AM EDT	Special Weather Statement	GYX	Carroll	60 min
Sep 12, 10:59 AM EDT	Special Weather Statement	GYX	Belknap, Merrimack	61 min
Sep 12, 11:44 AM EDT	Special Weather Statement	GYX	Rockingham	61 min
Sep 12, 12:10 PM EDT	Severe Thunderstorm Warning	GYX	Rockingham, Strafford	65 min
Sep 12, 2:08 PM EDT	Special Weather Statement	GYX	Rockingham, Strafford	37 min
Sep 12, 4:25 PM EDT	Special Weather Statement	GYX	Coos	35 min
Sep 12, 4:49 PM EDT	Severe Thunderstorm Warning	GYX	Coos, Grafton	56 min
Sep 12, 5:19 PM EDT	Special Weather Statement	GYX	Sullivan	56 min
Sep 12, 5:21 PM EDT	Special Weather Statement	GYX	Merrimack	24 min
Sep 12, 5:35 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Sullivan	55 min
Sep 12, 6:16 PM EDT	Areal Flood Advisory	GYX	Carroll, Coos, Grafton	119 min
Sep 12, 4:21 PM EDT	Special Weather Statement	GYX	Caledonia	39 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.