Alert archive / Rhode Island / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 71, NWS Boston/Norton, MA

August 20, 2001Newport County, Rhode Island

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 20, 2001, 6:12 PM EDT for Newport County, Rhode Island. It was in force for 33 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 20, 2001, 6:12 PM EDT (22:12 UTC)
Expired
Aug 20, 2001, 6:45 PM EDT
In force
33 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Newport County, RI

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.2 hours before the alert went out and 150 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, Brookhaven, NY at 12:00Z on 2001-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 414 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, Brookhaven, NY at 12:00Z on 2001-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 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
414 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
591 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

298 
WUUS51 KBOX 202212
SVRBOX
MAC005-RIC001-005-202245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
612 PM EDT MON AUG 20 2001

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BRISTOL COUNTY IN RHODE ISLAND
    INCLUDING BRISTOL
  NORTHERN NEWPORT COUNTY IN RHODE ISLAND
  BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS
    INCLUDING ATTLEBOROUGH...FALL RIVER...NEW BEDFORD...TAUNTON

* UNTIL 645 PM EDT.

* AT 610 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER BRISTOL...MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING AREA INCLUDE WARREN...TIVERTON...
  PORTSMOUTH...WESTPORT...SWANSEA...SOMERSET...REHOBOTH...RAYNHAM...
  NORTON...FREETOWN...DIGHTON...DARTMOUTH...BERKLEY AND ACUSHNET.

SEVERE THUNDERSTORMS PRODUCE LARGE HAIL AND/OR WIND STRONG ENOUGH TO
KNOCK DOWN TREES AND POWER LINES. MOVE INDOORS AND STAY AWAY FROM
WINDOWS.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 6:12 PM EDTSevere Thunderstorm WarningBOXBristol33 min

Nearby

Severe Thunderstorm Warnings in Rhode Island, 2001Every severe thunderstorm warning in 2001

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.