Alert archive / Rhode Island / Special Weather Statements in 2017

Special Weather Statement, NWS Boston/Norton, MA

June 21, 2017Newport County, Rhode Island

NWS Boston/Norton, MA issued this special weather statement at Jun 21, 2017, 7:05 PM EDT for Newport County, Rhode Island. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 21, 2017, 7:05 PM EDT (23:05 UTC)
Expired: Jun 21, 2017, 7:45 PM EDT
In force: 40 min
Issued by: NWS Boston/Norton, MA

County Newport County, RI

The radar

The Boston radar (KBOX), 55 km from the middle of the area, began a volume at 23:05 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.1 hours before the alert went out and 144 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: 23 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1706 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this special weather statement went out at Jun 21, 4:23 PM EDT, 2 hours 42 minutes earlier.

Area forecast discussion, Jun 21, 4:23 PM EDT, 2 hours 42 minutes before

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Hazardous weather outlook, Jun 21, 3:52 PM EDT, 3 hours 13 minutes before

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In the hours before

Special weather statement, Jun 21, 3:44 PM EDT, 3 hours 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
344 PM EDT WED JUN 21 2017

CTZ002-212045-
Hartford CT-
344 PM EDT WED JUN 21 2017

...Strong Thunderstorm Approaching Western Hartford County...

At 343 PM EDT, Doppler radar was tracking a strong thunderstorm over
Norfolk, in Litchfield County, moving east at 20 mph.

Dime size hail and winds in excess of 40 mph will accompany this
storm as it reaches Hartford County.

This strong thunderstorm will be near...
  Hartland around 415 PM EDT.
  Granby and Canton around 435 PM EDT.
  Simsbury and East Granby around 445 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.

&&

LAT...LON 4204 7301 4204 7282 4200 7281 4200 7277
      4183 7279 4186 7295 4189 7294 4190 7291
      4197 7289 4197 7303
TIME...MOT...LOC 1943Z 283DEG 19KT 4200 7317

JWD

Special weather statement, Jun 21, 6:23 PM EDT, 42 minutes before

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Special weather statement, Jun 21, 7:05 PM EDT, 0 minutes before

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The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 3:03 AM EDT	Small Craft Advisory	BOX		17 hr
Jun 21, 7:00 PM EDT	Special Marine Warning	BOX		45 min
Jun 21, 6:23 PM EDT	Special Weather Statement	BOX	Kent	52 min
Jun 21, 3:44 PM EDT	Special Weather Statement	BOX		61 min
Jun 21, 3:58 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	48 min

Nearby

Special Weather Statements in Rhode Island, 2017 Every special weather statement in 2017

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.