Alert archive / Rhode Island / Special Weather Statements in 2020

Special Weather Statement, NWS Boston/Norton, MA

July 20, 2020Kent County, Rhode Island

NWS Boston/Norton, MA issued this special weather statement at Jul 20, 2020, 5:24 AM EDT for Kent County, Rhode Island. It was in force for 66 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: Jul 20, 2020, 5:24 AM EDT (09:24 UTC)
Expired: Jul 20, 2020, 6:30 AM EDT
In force: 66 min
Issued by: NWS Boston/Norton, MA

County Kent County, RI

The radar

The Boston radar (KBOX), 52 km from the middle of the area, began a volume at 09:25 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 00:00Z, 9.4 hours before the alert went out and 231 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: 397 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1702 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 347 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

As transmitted.

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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
Jul 20, 1:19 AM EDT	Dense Fog Advisory	BOX	Nantucket	9 hr
Jul 20, 10:03 AM EDT	Dense Fog Advisory	BOX	Nantucket	57 min
Jul 20, 3:49 PM EDT	Dense Fog Advisory	BOX	Nantucket	3 hr

Nearby

Special Weather Statements in Rhode Island, 2020 Every special weather statement in 2020

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.