Alert archive / Massachusetts / Coastal Flood Warnings in 2011

Coastal Flood Warning 2, NWS Boston/Norton, MA

October 29, 20117 counties in Massachusetts

NWS Boston/Norton, MA issued this coastal flood warning at Oct 29, 2011, 5:14 AM EDT for 7 counties in Massachusetts. It took effect at Oct 29, 2011, 11:00 PM EDT. It was in force for 6 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: Oct 29, 2011, 5:14 AM EDT (09:14 UTC)
In effect from: Oct 29, 2011, 11:00 PM EDT
Expired: Oct 30, 2011, 5:00 AM EDT
In force: 6 hr
Issued by: NWS Boston/Norton, MA

Counties Barnstable County, MA, Dukes County, MA, Essex County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA

The radar

The Boston radar (KBOX), 37 km from the middle of the area, began a volume at 09:15 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

Chatham, MA (KCHH), launched 00:00Z, 9.2 hours before the alert went out and 66 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1737 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: -22 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 coastal 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 coastal flood warning went out at Oct 29, 4:43 AM EDT, 31 minutes earlier.

Area forecast discussion, Oct 29, 4:43 AM EDT, 31 minutes before

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Hazardous weather outlook, Oct 28, 4:05 PM EDT, 13 hours 9 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
Oct 29, 4:45 AM EDT	High Wind Warning	BOX	Barnstable, Bristol, Dukes, Essex, Middlesex, Nantucket and 3 more	30 hr
Oct 29, 4:51 AM EDT	Winter Weather Advisory	BOX	Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk	24 hr
Oct 29, 4:53 AM EDT	Storm Warning	BOX		33 hr
Oct 29, 5:14 AM EDT	Coastal Flood Advisory	BOX	Barnstable, Essex, Nantucket, Norfolk, Plymouth, Suffolk	10 hr

Nearby

Coastal Flood Warnings in Massachusetts, 2011 Every coastal flood warning in 2011

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.