Alert archive / Massachusetts / Coastal Flood Warnings in 2017

Coastal Flood Warning 2, NWS Boston/Norton, MA

February 12, 20175 counties in Massachusetts

NWS Boston/Norton, MA issued this coastal flood warning at Feb 12, 2017, 4:17 PM EST for 5 counties in Massachusetts. It took effect at Feb 13, 2017, 11:00 AM EST. It was in force for 5 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: Feb 12, 2017, 4:17 PM EST (21:17 UTC)
In effect from: Feb 13, 2017, 11:00 AM EST
Expired: Feb 13, 2017, 4:00 PM EST
In force: 5 hr
Issued by: NWS Boston/Norton, MA

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

The radar

The Boston radar (KBOX), 43 km from the middle of the area, began a volume at 21:16 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

Gray, ME (KGYX), launched 12:00Z, 9.3 hours before the alert went out and 218 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: 436 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 289 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 Feb 12, 12:58 PM EST, 3 hours 19 minutes earlier.

Area forecast discussion, Feb 12, 12:58 PM EST, 3 hours 19 minutes before

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Hazardous weather outlook, Feb 12, 7:00 AM EST, 9 hours 17 minutes before

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In the hours before

Local storm report, Feb 12, 2:33 PM EST, 1 hour 44 minutes before

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Local storm report, Feb 12, 3:52 PM EST, 25 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
Feb 12, 5:05 AM EST	High Wind Watch	BOX	Bristol, Dukes, Plymouth	11 hr
Feb 12, 4:17 PM EST	Coastal Flood Advisory	BOX	Essex, Norfolk, Plymouth, Suffolk	23 hr
Feb 12, 4:34 PM EST	High Wind Warning	BOX	Barnstable, Bristol, Dukes, Essex, Middlesex, Nantucket and 3 more	26 hr
Feb 12, 4:34 PM EST	Wind Advisory	BOX	Franklin, Hampden, Hampshire, Middlesex, Worcester	26 hr

Nearby

Coastal Flood Warnings in Massachusetts, 2017 Every coastal 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.