Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 112, NWS Gray, ME

July 18, 2008Carroll County, Coos County, Grafton County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 18, 2008, 11:11 AM EDT for Carroll County, Coos County, Grafton County, New Hampshire. It was in force for 34 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 18, 2008, 11:11 AM EDT (15:11 UTC)
Expired
Jul 18, 2008, 11:45 AM EDT
In force
34 min
Issued by
NWS Gray, ME
Area
Storm-based polygon

Counties Carroll County, NH, Coos County, NH, Grafton County, NH

The radar

The Portland,ME radar (KGYX), 100 km from the middle of the area, began a volume at 14:56 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, 3.2 hours before the alert went out and 99 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-pSkew-T log-p diagram, Gray, ME at 12:00Z on 2008-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Gray, ME at 12:00Z on 2008-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1449 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
102 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 18, 9:28 AM EDT, 1 hour 43 minutes earlier.

Area forecast discussion, Jul 18, 9:28 AM EDT, 1 hour 43 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, Jul 18, 3:00 AM EDT, 8 hours 11 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>

In the hours before

Special weather statement, Jul 18, 9:02 AM EDT, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
902 AM EDT FRI JUL 18 2008

MEZ007>009-NHZ001>003-181400-
CENTRAL SOMERSET-NORTHERN COOS-NORTHERN FRANKLIN-NORTHERN
GRAFTON-NORTHERN OXFORD-SOUTHERN COOS-
902 AM EDT FRI JUL 18 2008

...STRONG THUNDERSTORMS WILL IMPACT OXFORD COUNTY...SOMERSET
COUNTY...FRANKLIN COUNTY...GRAFTON COUNTY AND COOS COUNTY THROUGH
1000 AM EDT...

AT 902 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS CENTERED ALONG A LINE EXTENDING FROM COBURN
GORE TO 3 MILES EAST OF MILLSFIELD TO 18 MILES NORTHWEST OF
LISBON...OR ALONG A LINE EXTENDING FROM COBURN GORE TO 15 MILES
SOUTHEAST OF COLEBROOK TO 12 MILES SOUTHWEST OF ST.
JOHNSBURY...MOVING EAST AT 22 MPH. THIS STRONG THUNDERSTORM WILL
AFFECT AREAS IN AND AROUND COBURN
GORE...STRATFORD...MILLSFIELD...WILSONS MILLS...ERROL...LINCOLN
PLANTATION...WENTWORTHS LOCATION...NORTHUMBERLAND...GROVETON AND
GUILDHALL THROUGH 1000 AM EDT.

HEAVY RAINFALL AND SMALL HAIL CAN BE EXPECTED...WITH LOCAL PONDING
IN STREETS AND LOW-LYING AREAS.

POHL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 12:26 PM EDTSevere Thunderstorm WarningGYXCumberland, Oxford49 min
Jul 18, 1:10 PM EDTSevere Thunderstorm WarningGYXCumberland, York50 min
Jul 18, 1:23 PM EDTSpecial Marine WarningGYX97 min
Jul 18, 1:53 PM EDTSevere Thunderstorm WarningGYXCumberland37 min
Jul 18, 1:58 PM EDTSevere Thunderstorm WarningGYXOxford47 min
Jul 18, 2:05 PM EDTSevere Thunderstorm WarningGYXYork40 min
Jul 18, 2:08 PM EDTSevere Thunderstorm WarningGYXCumberland, York37 min
Jul 18, 2:10 PM EDTSpecial Marine WarningGYX95 min
Jul 18, 2:35 PM EDTSevere Thunderstorm WarningGYXCumberland, York55 min
Jul 18, 2:37 PM EDTSevere Thunderstorm WarningGYXCumberland, Oxford, York53 min
Jul 18, 3:18 PM EDTSpecial Marine WarningGYX57 min
Jul 18, 4:11 PM EDTSpecial Marine WarningGYX64 min
Jul 18, 4:48 PM EDTSevere Thunderstorm WarningGYXCumberland, Oxford, York42 min
Jul 18, 5:04 PM EDTSevere Thunderstorm WarningGYXYork41 min
Jul 18, 5:22 PM EDTSevere Thunderstorm WarningGYXCumberland, York53 min
Jul 18, 5:42 PM EDTSevere Thunderstorm WarningGYXYork48 min
Jul 18, 6:06 PM EDTSpecial Marine WarningGYX54 min
Jul 18, 6:13 PM EDTTornado WarningGYXYork21 min
Jul 18, 6:24 PM EDTSpecial Marine WarningGYX66 min
Jul 18, 6:34 PM EDTSevere Thunderstorm WarningGYXYork56 min
Jul 18, 7:01 PM EDTSpecial Marine WarningGYX15 min
Jul 18, 7:14 PM EDTSpecial Marine WarningGYX61 min
Jul 18, 1:35 PM EDTSevere Thunderstorm WarningGYXBelknap, Carroll, Grafton40 min
Jul 18, 2:26 PM EDTSevere Thunderstorm WarningGYXBelknap, Carroll, Grafton, Strafford34 min
Jul 18, 3:11 PM EDTSevere Thunderstorm WarningGYXGrafton49 min
Jul 18, 4:00 PM EDTSevere Thunderstorm WarningGYXCarroll, Grafton45 min
Jul 18, 4:11 PM EDTSevere Thunderstorm WarningGYXGrafton49 min
Jul 18, 4:38 PM EDTSevere Thunderstorm WarningGYXGrafton, Merrimack52 min
Jul 18, 4:52 PM EDTSevere Thunderstorm WarningGYXGrafton, Merrimack, Sullivan38 min
Jul 18, 4:58 PM EDTSevere Thunderstorm WarningGYXBelknap, Merrimack, Rockingham, Strafford47 min
Jul 18, 5:35 PM EDTSevere Thunderstorm WarningGYXMerrimack40 min
Jul 18, 5:39 PM EDTSevere Thunderstorm WarningGYXGrafton, Merrimack, Sullivan51 min
Jul 18, 5:48 PM EDTSevere Thunderstorm WarningGYXStrafford42 min
Jul 18, 6:57 PM EDTSevere Thunderstorm WarningGYXRockingham33 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2008Every severe thunderstorm warning in 2008

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.