Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 37, NWS Burlington, VT

September 9, 2015Grand Isle County, Vermont; Clinton County, Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Sep 9, 2015, 3:29 PM EDT for Grand Isle County, Vermont; Clinton County, Essex County, New York. It was in force for 31 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 9, 2015, 3:29 PM EDT (19:29 UTC)
Expired: Sep 9, 2015, 4:00 PM EDT
In force: 31 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon

Counties Clinton County, NY, Essex County, NY, Grand Isle County, VT

The radar

The Burlington radar (KCXX), 33 km from the middle of the area, began a volume at 19:29 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, 7.5 hours before the alert went out and 208 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: 11 J/kg
Mixed-layer CIN: -199 J/kg
Mixed-layer LCL: 1316 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 112 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 Burlington, VT wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 9, 2:13 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, Sep 9, 2:13 PM EDT, 1 hour 16 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, Sep 9, 3:21 AM EDT, 12 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BURLINGTON VT
321 AM EDT WED SEP 9 2015

NYZ026>031-034-035-087-VTZ001>012-016>019-100730-
NORTHERN ST. LAWRENCE-NORTHERN FRANKLIN-EASTERN CLINTON-
SOUTHEASTERN ST. LAWRENCE-SOUTHERN FRANKLIN-WESTERN CLINTON-
WESTERN ESSEX-EASTERN ESSEX-SOUTHWESTERN ST. LAWRENCE-GRAND ISLE-
WESTERN FRANKLIN-ORLEANS-ESSEX-WESTERN CHITTENDEN-LAMOILLE-CALEDONIA-
WASHINGTON-WESTERN ADDISON-ORANGE-WESTERN RUTLAND-WINDSOR-
EASTERN FRANKLIN-EASTERN CHITTENDEN-EASTERN ADDISON-EASTERN RUTLAND-
321 AM EDT WED SEP 9 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL
VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN
VERMONT.

.DAY ONE...TODAY AND TONIGHT.

SHOWERS AND THUNDERSTORMS WILL REDEVELOP ACROSS THE NORTH COUNTRY
TODAY AS A COLD FRONT MOVES INTO THE AREA FROM SOUTHEAST ONTARIO.
ACTIVITY WILL BE MOST WIDESPREAD ACROSS NORTHERN NEW YORK DURING
THE EARLY TO MID AFTERNOON HOURS...AND THEN SPREAD EAST INTO
VERMONT DURING THE MID TO LATE AFTERNOON HOURS. STRONGER
THUNDERSTORMS WILL PRODUCE TORRENTIAL DOWNPOURS AND GUSTY
WINDS. PONDING OF WATER ON ROADWAYS AND IN POOR DRAINAGE AREAS CAN
BE EXPECTED THIS AFTERNOON IN AREAS AFFECTED BY THUNDERSTORMS. ACTIVITY
WILL WEAKEN AS IT PUSHES EAST AND SOUTH OF VERMONT DURING THE LATE
EVENING HOURS.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Sep 9, 2:01 PM EDT, 1 hour 28 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>

Special weather statement, Sep 9, 2:24 PM EDT, 1 hour 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
224 PM EDT WED SEP 9 2015

NYZ027-028-030-031-VTZ001-002-005-091915-
NORTHERN FRANKLIN-SOUTHERN FRANKLIN-EASTERN CLINTON-WESTERN
CLINTON-WESTERN CHITTENDEN-GRAND ISLE-WESTERN FRANKLIN-
224 PM EDT WED SEP 9 2015

...A STRONG THUNDERSTORM OVER NORTHERN NEW YORK WILL MOVE INTO THE
NORTHERN CHAMPLAIN VALLEY...

AT 220 PM EDT...RADAR INDICATED A CLUSTER OF THUNDERSTORMS EXTENDING
FROM NEAR ELLENBURG AND CHATEAUGAY TO SOUTH OF MALONE MOVING EAST AT
35 MPH.

WINDS IN EXCESS OF 35 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS TO BE IMPACTED INCLUDE...
PLATTSBURGH INTERNATIONAL AIRPORT...GRAND ISLE...BEEKMANTOWN...
CHAZY...DANNEMORA...MOOERS...ALTONA...ROUSES POINT...SOUTH HERO...
CHAMPLAIN...CHATEAUGAY...NORTH HERO...ISLE LA MOTTE...BURKE...ALBURGH
DUNES STATE PARK...LYON MOUNTAIN...JERICHO...ELLENBURG DEPOT...
BRYANTS MILL AND ALBURGH.

BRIEFLY TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THE
THUNDERSTORMS, AND THIS WILL RESULT IN PONDING OF WATER ON ROADWAYS
ALONG WITH POOR VISIBLITY.

THE STORMS WILL BE MOVING INTO THE NORTHERN HALF OF LAKE CHAMPLAIN
SHORTLY AFTER 3 PM. BOATERS SHOULD HEAD TOWARD SHORE. DO NOT BE
CAUGHT ON THE WATER IN A THUNDERSTORM.

LAT...LON 4459 7318 4463 7449 4498 7410 4500 7391
      4501 7320
TIME...MOT...LOC 1818Z 255DEG 32KT 4486 7400

NASH

Special weather statement, Sep 9, 2:53 PM EDT, 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
253 PM EDT WED SEP 9 2015

NYZ035-VTZ005-009-017-018-091945-
EASTERN ESSEX-EASTERN ADDISON-WESTERN ADDISON-WESTERN
CHITTENDEN-EASTERN CHITTENDEN-
253 PM EDT WED SEP 9 2015

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN CHITTENDEN AND
NORTHERN ADDISON COUNTIES...

AT 253 PM EDT...A STRONG THUNDERSTORM WAS NEAR KINGSLAND BAY STATE
PARK...MOVING EAST AT 20 MPH.

WINDS IN EXCESS OF 30 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS TO BE IMPACTED INCLUDE...
ESSEX...WILLISTON...SHELBURNE...HINESBURG...RICHMOND...CHARLOTTE...
FERRISBURGH...MONKTON...HUNTINGTON...STARKSBORO...ST. GEORGE...
MONKTON BORO...MT. PHILO STATE PARK...KINGSLAND BAY STATE PARK...
MONKTON RIDGE...PARTRIDGE HARBOR...LOUIS CLEARING BAY...BOQUET...EAST
CHARLOTTE AND PICKET ISLAND.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 4427 7290 4423 7292 4419 7342 4434 7340
      4448 7301
TIME...MOT...LOC 1853Z 248DEG 19KT 4424 7338

KGM

Special weather statement, Sep 9, 3:12 PM EDT, 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
312 PM EDT WED SEP 9 2015

NYZ028-030-031-034-035-VTZ009-092000-
WESTERN ESSEX-SOUTHERN FRANKLIN-EASTERN CLINTON-EASTERN ESSEX-WESTERN
CLINTON-WESTERN ADDISON-
312 PM EDT WED SEP 9 2015

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT THE NORTHERN
ADIRONDACKS AND ADJACENT FOOTHILLS...

AT 310 PM EDT...AN AREA OF STRONG THUNDERSTORMS WAS 9 MILES SOUTHEAST
OF ADIRONDACK REGIONAL AIRPORT...MOVING NORTHEAST AT 45 MPH.

WINDS IN EXCESS OF 40 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS TO BE IMPACTED INCLUDE...
PERU...WILLSBORO...WESTPORT...WILMINGTON...ELIZABETHTOWN...KEENE
VALLEY...AU SABLE FORKS...JAY IN ESSEX COUNTY...PORT KENT...NORTH
ELBA...KEESEVILLE...BLACK BROOK...LEWIS...KEENE...PARTRIDGE HARBOR...
CLINTONVILLE...BOQUET...AUSABLE CHASM...CORLAER BAY AND REBER.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 4464 7339 4416 7339 4411 7419 4413 7418
      4419 7419 4441 7414 4448 7414 4452 7392
TIME...MOT...LOC 1910Z 247DEG 38KT 4430 7404

KGM

Special weather statement, Sep 9, 3:18 PM EDT, 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
318 PM EDT WED SEP 9 2015

NYZ028-030-031-035-VTZ001-002-005-016-092000-
SOUTHERN FRANKLIN-EASTERN CLINTON-EASTERN ESSEX-WESTERN
CLINTON-EASTERN FRANKLIN-WESTERN CHITTENDEN-GRAND ISLE-WESTERN
FRANKLIN-
318 PM EDT WED SEP 9 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE NORTHERN CHAMPLAIN
VALLEY...INCLUDING LAKE CHAMPLAIN...

AT 315 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM 8 MILES NORTHWEST OF FRANKLIN TO NEAR BEEKMANTOWN TO
10 MILES NORTHWEST OF WILMINGTON...AND MOVING EAST AT 35 MPH.

WIND GUSTS UP TO 40 MPH ARE POSSIBLE WITH THESE STORMS. LIGHTNING
AND TORRENTIAL RAINFALL IS ALSO OCCURRING...AND MAY CAUSE LOCALIZED
FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

LOCATIONS TO BE IMPACTED INCLUDE...
PLATTSBURGH INTERNATIONAL AIRPORT...FRANKLIN...PERU...GRAND ISLE...
BEEKMANTOWN...CHAZY...RICHFORD...SHELDON...FAIRFIELD...BERKSHIRE...
SOUTH HERO...ENOSBURG FALLS...NORTH HERO...ISLE LA MOTTE...LAKE CARMI
STATE PARK...ALBURGH DUNES STATE PARK...CLAYBURG...ALBURGH...HIGHGATE
FALLS AND PORT KENT.

FOR THOSE ON LAKE CHAMPLAIN...SEEK SAFE HARBOR AS THREATENING
WEATHER APPROACHES. HEAVY RAIN...LIGHTNING...AND A QUICK WIND SHIFT
TO THE NORTHWEST WILL OCCUR WITH GUSTS UP TO 40 MPH.

LAT...LON 4475 7283 4450 7339 4447 7402 4501 7333
      4501 7266
TIME...MOT...LOC 1915Z 257DEG 32KT 4506 7306 4472 7345 4448 7398

MUCCILLI

The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 9, 2:01 PM EDT	Special Weather Statement	BTV	Addison	44 min
Sep 9, 2:24 PM EDT	Special Weather Statement	BTV	Grand Isle	51 min
Sep 9, 2:53 PM EDT	Special Weather Statement	BTV	Chittenden	52 min
Sep 9, 3:18 PM EDT	Special Weather Statement	BTV	Franklin, Grand Isle	42 min
Sep 9, 3:41 PM EDT	Special Weather Statement	BTV	Franklin	49 min
Sep 9, 3:45 PM EDT	Special Weather Statement	BTV	Washington	30 min
Sep 9, 4:09 PM EDT	Severe Thunderstorm Warning	BTV	Orleans	44 min
Sep 9, 4:13 PM EDT	Special Weather Statement	BTV	Addison, Chittenden, Grand Isle	47 min
Sep 9, 4:24 PM EDT	Special Weather Statement	BTV	Washington	51 min
Sep 9, 4:48 PM EDT	Special Weather Statement	BTV	Essex	27 min
Sep 9, 5:15 PM EDT	Special Weather Statement	BTV	Orange, Rutland, Washington, Windsor	60 min
Sep 9, 12:13 AM EDT	Special Weather Statement	BTV	Franklin, St. Lawrence	62 min
Sep 9, 12:58 AM EDT	Special Weather Statement	BTV	Franklin	62 min
Sep 9, 3:12 PM EDT	Special Weather Statement	BTV	Essex	48 min

Nearby

Severe Thunderstorm Warnings in New York, 2015 Severe Thunderstorm Warnings in Vermont, 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.