Alert archive / Rhode Island / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 39, NWS Boston/Norton, MA

July 1, 2012Washington County, Rhode Island

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 1, 2012, 4:10 PM EDT for Washington County, Rhode Island. It was in force for 35 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 1, 2012, 4:10 PM EDT (20:10 UTC)
Expired: Jul 1, 2012, 4:45 PM EDT
In force: 35 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Washington County, RI

The radar

The Boston radar (KBOX), 71 km from the middle of the area, began a volume at 20:10 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.

What was reported inside it

Time	Report	Where	Remark
Jul 1, 4:14 PM EDT	HAIL 0.75	Hopkinton, RI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 1, 1:35 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.2 hours before the alert went out and 123 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: 254 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1757 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

996 
WUUS51 KBOX 012010
SVRBOX
RIC009-012045-
/O.NEW.KBOX.SV.W.0039.120701T2010Z-120701T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
410 PM EDT SUN JUL 1 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL WASHINGTON COUNTY IN  RHODE ISLAND...

* UNTIL 445 PM EDT

* AT 406 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN
  EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HOPKINTON...OR 11
  MILES NORTHEAST OF MYSTIC...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SOUTH KINGSTOWN...NORTH KINGSTOWN...NARRAGANSETT...HOPKINTON...
  RICHMOND...CHARLESTOWN AND KINGSTON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR
PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4141 7183 4142 7180 4156 7179 4151 7142
      4144 7144 4143 7146 4141 7145 4136 7148
      4138 7153 4137 7153 4137 7156 4135 7165
TIME...MOT...LOC 2006Z 287DEG 29KT 4151 7188 

$$

VALLIER-TALBOT

1 follow-up statement

510 
WWUS51 KBOX 012042
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
442 PM EDT SUN JUL 1 2012

RIC009-012051-
/O.EXP.KBOX.SV.W.0039.000000T0000Z-120701T2045Z/
WASHINGTON RI-
442 PM EDT SUN JUL 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WASHINGTON COUNTY
WILL EXPIRE AT 445 PM EDT...

THE STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. 
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER GUSTY WINDS 
ARE STILL POSSIBLE WITH THESE THUNDERSTORMS.

LAT...LON 4141 7183 4142 7180 4156 7179 4151 7142
      4144 7144 4143 7146 4141 7145 4136 7148
      4138 7153 4137 7153 4137 7156 4135 7165
TIME...MOT...LOC 2041Z 287DEG 29KT 4151 7188 

$$

VALLIER-TALBOT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 3:04 PM EDT	Severe Thunderstorm Warning	BOX	Providence	41 min
Jul 1, 3:38 PM EDT	Severe Thunderstorm Warning	BOX	Kent, Providence, Washington	52 min
Jul 1, 3:44 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Kent, Newport, Providence	46 min
Jul 1, 4:27 PM EDT	Severe Thunderstorm Warning	BOX	Kent, Washington	24 min
Jul 1, 4:34 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Kent, Newport, Providence	41 min
Jul 1, 6:24 PM EDT	Special Weather Statement	BOX	Washington	36 min
Jul 1, 6:35 PM EDT	Severe Thunderstorm Warning	BOX	Washington	25 min

Nearby

Severe Thunderstorm Warnings in Rhode Island, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.