Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 40, NWS Gray, ME

July 1, 2015Rockingham County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 1, 2015, 4:47 PM EDT for Rockingham County, New Hampshire. It was in force for 28 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 1, 2015, 4:47 PM EDT (20:47 UTC)
Expired: Jul 1, 2015, 5:15 PM EDT
In force: 28 min
Issued by: NWS Gray, ME
Area: Storm-based polygon

County Rockingham County, NH

The radar

The Boston radar (KBOX), 115 km from the middle of the area, began a volume at 20:48 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, 8.8 hours before the alert went out and 121 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 699 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 136 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 1, 2:44 PM EDT, 2 hours 3 minutes earlier.

Area forecast discussion, Jul 1, 2:44 PM EDT, 2 hours 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
244 PM EDT WED JUL 1 2015

.SYNOPSIS...
A COLD FRONT WILL CROSS THE REGION EARLY TONIGHT. THIS SYSTEM
WILL BRING SHOWERS AND THUNDERSTORMS TO THE REGION THROUGH THIS
EVENING...BEFORE HIGH PRESSURE BUILDS IN ON THURSDAY. HIGH
PRESSURE WILL THEN REMAIN IN PLACE THROUGH EARLY NEXT WEEK. LOW
PRESSURE ALONG THE NEW ENGLAND COASTLINE MAY BRING SHOWERS TO THE
REGION LATE IN THE WEEK.

&&

.NEAR TERM /THROUGH TONIGHT/...
SOUTHERN NEW HAMPSHIRE BEGINNING TO SEE A LITTLE BIT OF HEATING
THIS AFTERNOON. ONCE TEMPERATURES CLIMB INTO THE MID
70S...CONVECTION SHOULD GET GOING. ALREADY SEEING SOME CONVECTION
FIRING OVER SOUTHERN VERMONT AND EASTERN NEW YORK. THE REST OF THE
FORECAST AREA PROBABLY WILL NOT SEE ENOUGH HEATING FOR MUCH IN THE
WAY OF CONVECTION. LOW CLOUDS AND RAIN WILL HANG AROUND UNTIL THE
COLD FRONT SWINGS THROUGH LATER TONIGHT. EXPECT PATCHY FOG TO
DEVELOP AS SKIES BEGIN TO CLEAR AND RADIATIONAL COOLING GETS
GOING.

&&

.SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/...
HIGH PRESSURE BUILDS OVER THE REGION WITH SUNNY SKIES TOMORROW AND
CLEAR SKIES TOMORROW NIGHT.

&&

.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
A WEAK TROUGH OF LOW PRESSURE WILL CROSS THE REGION LATE IN THE
WEEKEND. THIS WILL BRING ONLY A SLIGHT CHANCE FOR SHOWERS TO THE
AREA AS THE WEAK SURFACE FRONT WILL BE RELATIVELY MOISTURE
STARVED.

HIGH PRESSURE WITH MODERATING TEMPERATURES WILL BE THE FOCUS FOR
EARLY NEXT WEEK. MAINLY DRY CONDITIONS WILL ACCOMPANY THE 850 MB
TEMPERATURES WILL FINALLY BE ON THE RISE WITHIN A WEAK DEVELOPING
SOUTHWESTERLY FLOW.

12Z MODEL SUITE IN GOOD AGREEMENT WITH A SURFACE LOW DEVELOPING
SOUTH OF NEW ENGLAND LATE IN THE WEEK. HOWEVER...THE PASSAGE AND
EXACT TRACK OF THAT SYSTEM WILL PLAY A SIGNIFICANT ROLE AS TO
WHETHER A STEADY RAIN WILL FALL OVER SOUTHERN AREAS...OR SCATTERED
SHOWER ACTIVITY.

&&

.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
SHORT TERM...IFR/LIFR CONDITIONS WILL BE SLOW TO IMPROVE. EVEN
THOUGH CIGS WILL LIKELY BEGIN TO INCREASE LATER THIS
EVENING...RADIATIONAL COOLING WILL FORM FOG THAT WILL KEEP VSBYS
AT IFR/LIFR AT MOST LOCATIONS THROUGH MORNING. VFR CONDITIONS ARE
EXPECTED TOMORROW AND TOMORROW NIGHT.

LONG TERM...HIGH PRESSURE WILL KEEP VFR CONDITIONS ACROSS THE AREA
THROUGH EARLY THIS WEEKEND. NIGHTTIME FOG IS POSSIBLE EACH NIGHT
AT LEBANON AND WHITEFIELD. IFR CONDITIONS ARE POSSIBLE ON SUNDAY
AND AGAIN ON WEDNESDAY.

&&

.MARINE...
SHORT TERM...NO FLAGS EXPECTED.

LONG TERM...WEAK PRESSURE GRADIENTS LEAD TO LIGHT WINDS AND LOW
WAVE HEIGHTS THROUGH MUCH OF NEXT WEEK.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...NONE.

&&

Hazardous weather outlook, Jul 1, 4:18 PM EDT, 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAY ME
418 PM EDT WED JUL 1 2015

MEZ023>028-NHZ014-022030-
COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN-KNOX-COASTAL WALDO-
COASTAL ROCKINGHAM-
418 PM EDT WED JUL 1 2015

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

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO CALL OR RADIO IN SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MEZ007>009-012>014-018>022-NHZ001>006-009-010-022030-
NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD-
SOUTHERN FRANKLIN-SOUTHERN SOMERSET-INTERIOR YORK-
INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC-INTERIOR WALDO-
NORTHERN COOS-SOUTHERN COOS-NORTHERN GRAFTON-NORTHERN CARROLL-
SOUTHERN GRAFTON-SOUTHERN CARROLL-BELKNAP-STRAFFORD-
418 PM EDT WED JUL 1 2015

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

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO CALL OR RADIO IN SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

NHZ007-008-011>013-015-022030-
SULLIVAN-MERRIMACK-CHESHIRE NH-EASTERN HILLSBOROUGH NH-
INTERIOR ROCKINGHAM-WESTERN AND CENTRAL HILLSBOROUGH NH-
418 PM EDT WED JUL 1 2015

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

.DAY ONE...TONIGHT.

SCATTERED SHOWERS AND THUNDERSTORMS WILL CROSS THE REGION THROUGH
EARLY THIS EVENING. A FEW OF THE STORMS MAY CONTAIN STRONG GUSTY
WINDS AND HAIL

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO CALL OR RADIO IN SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

ANZ150>154-022030-
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-
418 PM EDT WED JUL 1 2015

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.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO CALL OR RADIO IN SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, Jul 1, 2:52 PM EDT, 1 hour 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
252 PM EDT WED JUL 1 2015

NHZ007-008-011-015-011930-
WESTERN AND CENTRAL HILLSBOROUGH NH-MERRIMACK NH-CHESHIRE NH-
SULLIVAN NH-
252 PM EDT WED JUL 1 2015

THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  WESTERN AND CENTRAL HILLSBOROUGH COUNTY IN NEW HAMPSHIRE
  MERRIMACK COUNTY IN NEW HAMPSHIRE
  CHESHIRE COUNTY IN NEW HAMPSHIRE
  SULLIVAN COUNTY IN NEW HAMPSHIRE

* UNTIL 330 PM EDT

* AT 252 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM OVER BELLOWS FALLS...MOVING TO THE EAST AT 40
  MPH.

* PEA SIZE HAIL AND WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED WITH THIS
  STORM.

* LOCATIONS IMPACTED INCLUDE...
  MARLOW...
  SULLIVAN...
  SURRY...
  GILSUM...
  AND ALSTEAD.

LAT...LON 4308 7244 4310 7244 4311 7243 4313 7244
      4314 7246 4317 7245 4319 7245 4339 7183
      4296 7195 4299 7246 4300 7244 4302 7246
      4305 7247
TIME...MOT...LOC 1849Z 252DEG 34KT 4312 7245

CEMPA

Special weather statement, Jul 1, 3:29 PM EDT, 1 hour 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
329 PM EDT WED JUL 1 2015

NHZ011-015-012015-
WESTERN AND CENTRAL HILLSBOROUGH NH-CHESHIRE NH-
329 PM EDT WED JUL 1 2015

THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  WESTERN AND CENTRAL HILLSBOROUGH COUNTY IN NEW HAMPSHIRE
  CHESHIRE COUNTY IN NEW HAMPSHIRE

* UNTIL 415 PM EDT

* AT 328 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM NEAR MARLOW...MOVING TO THE EAST AT 30 MPH.

* PEA SIZE HAIL AND WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED WITH THIS
  STORM.

* LOCATIONS IMPACTED INCLUDE...
  MARLOW...
  SULLIVAN...
  GILSUM...
  HILLSBOROUGH...
  AND DEERING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM COULD INTENSIFY...SO MONITOR LOCAL RADIO AND TELEVISION
FOR ADDITIONAL INFORMATION...AND POSSIBLE WARNINGS...FROM THE
NATIONAL WEATHER SERVICE.

&&

LAT...LON 4317 7227 4316 7217 4313 7218 4313 7204
      4315 7203 4313 7186 4312 7186 4313 7180
      4312 7172 4289 7172 4299 7236
TIME...MOT...LOC 1925Z 270DEG 23KT 4307 7219

CEMPA

Special weather statement, Jul 1, 4:16 PM EDT, 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
416 PM EDT WED JUL 1 2015

NHZ008-013-015-012100-
WESTERN AND CENTRAL HILLSBOROUGH NH-INTERIOR ROCKINGHAM NH-
MERRIMACK NH-
416 PM EDT WED JUL 1 2015

THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  WESTERN AND CENTRAL HILLSBOROUGH COUNTY IN NEW HAMPSHIRE
  INTERIOR ROCKINGHAM COUNTY IN NEW HAMPSHIRE
  MERRIMACK COUNTY IN NEW HAMPSHIRE

* UNTIL 500 PM EDT

* AT 416 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM OVER WEARE...MOVING TO THE EAST AT 30 MPH.

* PEA SIZE HAIL AND WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED WITH THIS
  STORM.

* LOCATIONS IMPACTED INCLUDE...
  CONCORD...
  SUNCOOK...
  SOUTH HOOKSETT...
  HOOKSETT...
  AND RAYMOND.

LAT...LON 4302 7145 4304 7146 4304 7147 4305 7149
      4305 7151 4303 7151 4307 7182 4318 7182
      4327 7124 4298 7113
TIME...MOT...LOC 2015Z 265DEG 27KT 4312 7171

CEMPA

Special weather statement, Jul 1, 4:27 PM EDT, 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
427 PM EDT WED JUL 1 2015

NHZ013-014-012115-
INTERIOR ROCKINGHAM NH-COASTAL ROCKINGHAM NH-
427 PM EDT WED JUL 1 2015

THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  INTERIOR ROCKINGHAM COUNTY IN NEW HAMPSHIRE
  COASTAL ROCKINGHAM COUNTY IN NEW HAMPSHIRE

* UNTIL 515 PM EDT

* AT 426 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM NEAR SALEM...MOVING TO THE NORTHEAST AT 35
  MPH.

* PEA SIZE HAIL AND WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED WITH THIS
  STORM.

* LOCATIONS IMPACTED INCLUDE...
  EXETER...
  HAMPTON...
  RYE...
  SEABROOK...
  AND NEWTON.

LAT...LON 4279 7120 4289 7127 4307 7071 4305 7069
      4304 7071 4294 7080 4287 7082 4286 7084
      4288 7089 4288 7093 4287 7097 4286 7103
      4281 7107 4282 7113
TIME...MOT...LOC 2025Z 242DEG 30KT 4288 7116

CEMPA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 3:55 PM EDT	Special Marine Warning	GYX		50 min
Jul 1, 5:06 PM EDT	Special Marine Warning	GYX		24 min
Jul 1, 6:50 AM EDT	Special Weather Statement	GYX	Cheshire, Sullivan	55 min
Jul 1, 2:52 PM EDT	Special Weather Statement	GYX	Sullivan	38 min
Jul 1, 3:29 PM EDT	Special Weather Statement	GYX	Hillsborough	46 min
Jul 1, 4:16 PM EDT	Special Weather Statement	GYX	Merrimack	44 min
Jul 1, 4:27 PM EDT	Special Weather Statement	GYX	Rockingham	48 min
Jul 1, 4:36 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Merrimack, Rockingham, Strafford	39 min
Jul 1, 5:26 PM EDT	Special Weather Statement	GYX	Cheshire, Hillsborough	49 min
Jul 1, 5:46 PM EDT	Special Weather Statement	GYX	Strafford	44 min
Jul 1, 5:52 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Hillsborough	38 min
Jul 1, 6:28 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Merrimack, Rockingham	47 min
Jul 1, 7:13 PM EDT	Special Weather Statement	GYX	Rockingham	62 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2015 Every severe thunderstorm warning in 2015

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.