Alert archive / Rhode Island / Areal Flood Advisories in 2012

Areal Flood Advisory 4, NWS Boston/Norton, MA

April 23, 2012Kent County, Providence County, Washington County, Rhode Island

NWS Boston/Norton, MA issued this areal flood advisory at Apr 23, 2012, 7:07 AM EDT for Kent County, Providence County, Washington County, Rhode Island. It was in force for 104 min.

The area

The counties it named.

The facts

Issued: Apr 23, 2012, 7:07 AM EDT (11:07 UTC)
Expired: Apr 23, 2012, 8:51 AM EDT
In force: 104 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Kent County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 51 km from the middle of the area, began a volume at 11:11 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 00:00Z, 11.1 hours before the alert went out and 137 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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 427 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 357 m²/s²
0-3 km storm-relative helicity: 376 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 areal flood advisory 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 areal flood advisory went out at Apr 23, 4:45 AM EDT, 2 hours 22 minutes earlier.

Area forecast discussion, Apr 23, 4:45 AM EDT, 2 hours 22 minutes before

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Hazardous weather outlook, Apr 23, 4:32 AM EDT, 2 hours 35 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
Apr 22, 10:15 PM EDT	Areal Flood Advisory	BOX	Hampden	5 hr
Apr 23, 12:48 AM EDT	Special Weather Statement	BOX	Bristol, Hampden, Norfolk, Worcester	57 min
Apr 23, 4:24 AM EDT	Small Craft Advisory	BOX		48 hr
Apr 23, 7:51 AM EDT	Areal Flood Advisory	BOX	Bristol, Middlesex, Norfolk, Worcester	3 hr
Apr 23, 8:35 AM EDT	Special Weather Statement	BOX	Bristol	40 min
Apr 23, 1:22 AM EDT	Areal Flood Advisory	BOX	Bristol, Kent, Newport, Providence, Washington	3 hr

Nearby

Areal Flood Advisories in Rhode Island, 2012 Every areal flood advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.