Alert archive / Massachusetts / Special Weather Statements in 2019

Special Weather Statement, NWS Boston/Norton, MA

January 20, 2019Barnstable County, Nantucket County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Jan 20, 2019, 10:57 AM EST for Barnstable County, Nantucket County, Massachusetts. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jan 20, 2019, 10:57 AM EST (15:57 UTC)
Expired: Jan 20, 2019, 12:00 PM EST
In force: 63 min
Issued by: NWS Boston/Norton, MA

Counties Barnstable County, MA, Nantucket County, MA

The radar

The Boston radar (KBOX), 92 km from the middle of the area, began a volume at 16:01 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 12:00Z, 4.0 hours before the alert went out and 13 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: 452 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 452 m²/s²
0-3 km storm-relative helicity: 447 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jan 20, 10:26 AM EST, 31 minutes earlier.

Area forecast discussion, Jan 20, 10:26 AM EST, 31 minutes before

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In the hours before

Local storm report, Jan 20, 8:38 AM EST, 2 hours 19 minutes before

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Local storm report, Jan 20, 8:39 AM EST, 2 hours 18 minutes before

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Local storm report, Jan 20, 9:44 AM EST, 1 hour 13 minutes before

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Local storm report, Jan 20, 9:55 AM EST, 1 hour 2 minutes before

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Local storm report, Jan 20, 10:45 AM EST, 12 minutes before

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Special weather statement, Jan 20, 10:57 AM EST, 0 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 20, 4:13 AM EST	Heavy Freezing Spray Warning	BOX		50 hr
Jan 20, 4:13 AM EST	Heavy Freezing Spray Advisory	BOX		55 hr
Jan 20, 4:20 AM EST	Wind Chill Warning	BOX	Franklin, Hampden, Hampshire, Middlesex, Worcester	47 hr
Jan 20, 4:20 AM EST	Wind Chill Advisory	BOX	Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 4 more	54 hr
Jan 20, 10:23 AM EST	Areal Flood Warning	BOX	Barnstable, Bristol, Dukes, Plymouth	4 hr
Jan 20, 10:59 AM EST	Special Marine Warning	BOX		61 min
Jan 20, 11:16 AM EST	High Wind Warning	BOX	Barnstable, Dukes, Nantucket	4 hr
Jan 20, 12:15 PM EST	Special Marine Warning	BOX		60 min
Jan 20, 3:13 PM EST	Gale Warning	BOX		47 hr
Jan 20, 3:20 PM EST	Coastal Flood Statement	BOX	Barnstable, Essex, Nantucket, Norfolk, Plymouth, Suffolk	21 hr

Nearby

Special Weather Statements in Massachusetts, 2019 Every special weather statement in 2019

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.