Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 154, NWS Gray, ME

August 25, 2015Hillsborough County, Merrimack County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Aug 25, 2015, 12:40 PM EDT for Hillsborough County, Merrimack County, New Hampshire. It was in force for 50 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 25, 2015, 12:40 PM EDT (16:40 UTC)
Expired: Aug 25, 2015, 1:30 PM EDT
In force: 50 min
Issued by: NWS Gray, ME
Area: Storm-based polygon

Counties Hillsborough County, NH, Merrimack County, NH

The radar

The Boston radar (KBOX), 136 km from the middle of the area, began a volume at 16:40 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, 4.7 hours before the alert went out and 180 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: 0 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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 25, 9:08 AM EDT, 3 hours 32 minutes earlier.

Area forecast discussion, Aug 25, 9:08 AM EDT, 3 hours 32 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Aug 25, 3:11 AM EDT, 9 hours 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAY ME
311 AM EDT TUE AUG 25 2015

NHZ003>015-261000-
NORTHERN GRAFTON-NORTHERN CARROLL-SOUTHERN GRAFTON-SOUTHERN CARROLL-
SULLIVAN-MERRIMACK-BELKNAP-STRAFFORD-CHESHIRE NH-
EASTERN HILLSBOROUGH NH-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM-
WESTERN AND CENTRAL HILLSBOROUGH NH-
311 AM EDT TUE AUG 25 2015

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

.DAY ONE...TODAY AND TONIGHT.

SHOWERS AND THUNDERSTORMS WILL CROSS SOUTHERN AND CENTRAL NEW
HAMPSHIRE TODAY. A FEW OF THE STORMS MAY CONTAIN STRONG GUSTY
WINDS...HAIL...AND HEAVY RAINFALL....ESPECIALLY LATE THIS
AFTERNOON INTO EARLY EVENING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

MEZ007>009-012>014-018>028-NHZ001-002-261000-
NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD-
SOUTHERN FRANKLIN-SOUTHERN SOMERSET-INTERIOR YORK-
INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC-INTERIOR WALDO-
COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN-KNOX-COASTAL WALDO-
NORTHERN COOS-SOUTHERN COOS-
311 AM EDT TUE AUG 25 2015

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

.DAY ONE...TODAY AND TONIGHT.

A FEW SCATTERED THUNDERSTORMS TODAY COULD PRODUCE VERY HEAVY
RAINFALL AND GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

ANZ150>154-261000-
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-
311 AM EDT TUE AUG 25 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...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

In the hours before

Special weather statement, Aug 25, 7:04 AM EDT, 5 hours 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
704 AM EDT TUE AUG 25 2015

NHZ011-015-251145-
CHESHIRE NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
704 AM EDT TUE AUG 25 2015

THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A

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

* UNTIL 745 AM EDT

* AT 703 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM OVER HINSDALE...MOVING TO THE NORTH AT 25
  MPH.

* WIND GUSTS OF 35 MPH ARE EXPECTED WITH THIS STORM. VERY HEAVY RAIN
  IS FALLING...AND WILL CAUSE WATER TO POND ON ROADWAYS AND QUICKLY
  FILL ROADSIDE DITCHES AND SMALL STREAMS.

* LOCATIONS IMPACTED INCLUDE...
  SULLIVAN...
  SURRY...
  GILSUM...
  DUBLIN...
  AND RICHMOND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

&&

LAT...LON 4292 7252 4295 7253 4297 7248 4300 7246
      4300 7244 4305 7247 4308 7244 4316 7245
      4315 7243 4314 7243 4314 7236 4304 7196
      4272 7222 4273 7246 4277 7249 4277 7252
      4281 7254 4287 7256
TIME...MOT...LOC 1100Z 197DEG 21KT 4281 7249

LEGRO

Special weather statement, Aug 25, 8:09 AM EDT, 4 hours 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
809 AM EDT TUE AUG 25 2015

NHZ011-015-251300-
CHESHIRE NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
809 AM EDT TUE AUG 25 2015

THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A

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

* UNTIL 900 AM EDT

* AT 808 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM OVER TROY...MOVING TO THE NORTHEAST AT 25
  MPH.

* WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED WITH THIS STORM. VERY HEAVY
  RAIN IS FALLING...AND WILL CAUSE WATER TO POND ON ROADWAYS AND
  QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

* LOCATIONS IMPACTED INCLUDE...
  JAFFREY...
  SHARON...
  DUBLIN...
  PETERBOROUGH...
  AND RINDGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

DO NOT STAY IN THE OPEN OR SHELTER UNDER TREES WHEN LIGHTNING
THREATENS. SEEK SHELTER INSIDE A STURDY BUILDING OR IN A VEHICLE.

&&

LAT...LON 4272 7227 4289 7231 4308 7190 4273 7175
      4271 7198
TIME...MOT...LOC 1207Z 240DEG 20KT 4282 7217

KISTNER

Special weather statement, Aug 25, 8:56 AM EDT, 3 hours 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
856 AM EDT TUE AUG 25 2015

NHZ008-012-015-251345-
MERRIMACK NH-EASTERN HILLSBOROUGH NH-
WESTERN AND CENTRAL HILLSBOROUGH NH-
856 AM EDT TUE AUG 25 2015

THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A

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

* UNTIL 945 AM EDT

* AT 855 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM NEAR GREENFIELD...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...
  HENNIKER...
  GOFFSTOWN...
  DEERING...
  WEARE...
  AND HOPKINTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

&&

LAT...LON 4286 7191 4297 7202 4330 7174 4305 7142
TIME...MOT...LOC 1253Z 232DEG 28KT 4293 7192

KISTNER

Special weather statement, Aug 25, 12:21 PM EDT, 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
1221 PM EDT TUE AUG 25 2015

NHZ008-012-015-251700-
MERRIMACK NH-EASTERN HILLSBOROUGH NH-
WESTERN AND CENTRAL HILLSBOROUGH NH-
1221 PM EDT TUE AUG 25 2015

THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A

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

* UNTIL 100 PM EDT

* AT 1220 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
  TRACKING A STRONG THUNDERSTORM OVER GREENFIELD...MOVING TO THE EAST
  AT 30 MPH.

* WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED WITH THIS STORM. VERY HEAVY
  RAIN IS FALLING...AND WILL CAUSE WATER TO POND ON ROADWAYS AND
  QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

* LOCATIONS IMPACTED INCLUDE...
  MANCHESTER...
  CONCORD...
  AMHERST...
  MONT VERNON...
  AND GOFFSTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

DO NOT STAY IN THE OPEN OR SHELTER UNDER TREES WHEN LIGHTNING
THREATENS. SEEK SHELTER INSIDE A STURDY BUILDING OR IN A VEHICLE.

&&

LAT...LON 4284 7198 4312 7193 4326 7147 4295 7138
      4294 7138 4293 7145 4287 7144
TIME...MOT...LOC 1619Z 254DEG 28KT 4297 7184

KISTNER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 7:04 AM EDT	Special Weather Statement	GYX	Cheshire	41 min
Aug 25, 7:48 AM EDT	Areal Flood Advisory	GYX	Cheshire	4 hr
Aug 25, 8:09 AM EDT	Special Weather Statement	GYX	Cheshire	51 min
Aug 25, 8:56 AM EDT	Special Weather Statement	GYX	Hillsborough	49 min
Aug 25, 9:59 AM EDT	Areal Flood Advisory	GYX	Cheshire, Hillsborough, Merrimack, Sullivan	5 hr
Aug 25, 12:21 PM EDT	Special Weather Statement	GYX	Hillsborough	39 min
Aug 25, 12:51 PM EDT	Areal Flood Advisory	GYX	Belknap, Hillsborough, Merrimack	114 min
Aug 25, 1:23 PM EDT	Special Weather Statement	GYX	Strafford	37 min
Aug 25, 1:24 PM EDT	Special Weather Statement	GYX	Carroll	36 min
Aug 25, 1:52 PM EDT	Special Weather Statement	GYX	Carroll	23 min
Aug 25, 2:13 PM EDT	Special Weather Statement	GYX	Carroll	47 min
Aug 25, 3:35 PM EDT	Special Weather Statement	GYX	Cheshire	40 min
Aug 25, 3:48 PM EDT	Special Weather Statement	GYX	Sullivan	42 min
Aug 25, 3:57 PM EDT	Flash Flood Warning	GYX	Cheshire, Hillsborough	6 hr
Aug 25, 4:21 PM EDT	Special Weather Statement	GYX	Hillsborough	39 min
Aug 25, 4:33 PM EDT	Special Weather Statement	GYX	Grafton	42 min
Aug 25, 4:54 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough	51 min
Aug 25, 5:10 PM EDT	Special Weather Statement	GYX	Sullivan	50 min
Aug 25, 5:22 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	38 min
Aug 25, 5:28 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack	47 min
Aug 25, 6:06 PM EDT	Special Weather Statement	GYX	Grafton	39 min
Aug 25, 6:14 PM EDT	Areal Flood Advisory	GYX	Cheshire, Hillsborough, Merrimack	3 hr
Aug 25, 6:21 PM EDT	Special Weather Statement	GYX	Rockingham	39 min
Aug 25, 7:04 PM EDT	Special Weather Statement	GYX	Carroll	41 min
Aug 25, 7:08 PM EDT	Special Weather Statement	GYX	Grafton	52 min
Aug 25, 7:13 PM EDT	Special Weather Statement	GYX	Strafford	47 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.