Alert archive / Massachusetts / Coastal Flood Warnings in 2017

Coastal Flood Warning 1, NWS Boston/Norton, MA

January 23, 20176 counties in Massachusetts

NWS Boston/Norton, MA issued this coastal flood warning at Jan 23, 2017, 5:31 PM EST for 6 counties in Massachusetts. It took effect at Jan 24, 2017, 5:00 AM EST. 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: Jan 23, 2017, 5:31 PM EST (22:31 UTC)
In effect from: Jan 24, 2017, 5:00 AM EST
Expired: Jan 24, 2017, 11:12 AM EST
In force: 6 hr
Issued by: NWS Boston/Norton, MA

Counties Barnstable 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 22:34 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, 10.5 hours before the alert went out and 211 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 692 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 76 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 Jan 23, 5:05 PM EST, 26 minutes earlier.

Area forecast discussion, Jan 23, 5:05 PM EST, 26 minutes before

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Hazardous weather outlook, Jan 23, 4:09 AM EST, 13 hours 22 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
Jan 23, 4:00 AM EST	Coastal Flood Watch	BOX	Barnstable, Dukes, Essex, Nantucket, Norfolk, Plymouth and 1 more	14 hr
Jan 23, 4:00 AM EST	Coastal Flood Advisory	BOX	Barnstable, Dukes, Essex, Nantucket, Norfolk, Plymouth and 1 more	18 hr
Jan 23, 4:11 AM EST	Wind Advisory	BOX	Bristol, Essex, Hampden, Middlesex, Norfolk, Plymouth and 2 more	31 hr
Jan 23, 5:31 PM EST	Coastal Flood Advisory	BOX	Dukes	18 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.