Alert archive / Rhode Island / Areal Flood Warnings in 2017

Areal Flood Warning 8, NWS Boston/Norton, MA

July 11, 2017Bristol County, Kent County, Providence County, Rhode Island

NWS Boston/Norton, MA issued this areal flood warning at Jul 11, 2017, 8:55 AM EDT for Bristol County, Kent County, Providence County, Rhode Island. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 11, 2017, 8:55 AM EDT (12:55 UTC)
Expired: Jul 11, 2017, 11:00 AM EDT
In force: 2 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Bristol County, RI, Kent County, RI, Providence County, RI

The radar

The Boston radar (KBOX), 37 km from the middle of the area, began a volume at 12:57 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, 0.9 hours before the alert went out and 152 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: 1083 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 576 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Jul 11, 7:54 AM EDT, 1 hour 1 minute earlier.

Area forecast discussion, Jul 11, 7:54 AM EDT, 1 hour 1 minute before

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Hazardous weather outlook, Jul 11, 4:15 AM EDT, 4 hours 40 minutes before

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In the hours before

Special weather statement, Jul 11, 6:22 AM EDT, 2 hours 33 minutes before

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Special weather statement, Jul 11, 7:12 AM EDT, 1 hour 43 minutes before

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Special weather statement, Jul 11, 8:22 AM EDT, 33 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
Jul 11, 6:22 AM EDT	Special Weather Statement	BOX	Norfolk	38 min
Jul 11, 6:35 AM EDT	Areal Flood Warning	BOX	Bristol	115 min
Jul 11, 7:12 AM EDT	Special Weather Statement	BOX	Plymouth	93 min
Jul 11, 9:13 AM EDT	Special Marine Warning	BOX		62 min
Jul 11, 9:23 AM EDT	Severe Thunderstorm Warning	BOX	Bristol	37 min
Jul 11, 9:49 AM EDT	Severe Thunderstorm Warning	BOX	Bristol	26 min
Jul 11, 8:22 AM EDT	Special Weather Statement	BOX	Bristol, Kent	53 min

Nearby

Areal Flood Warnings in Rhode Island, 2017 Every areal flood warning 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.