Alert archive / Massachusetts / Areal Flood Warnings in 2017

Areal Flood Warning 26, NWS Boston/Norton, MA

October 29, 2017Franklin County, Hampden County, Hampshire County, Massachusetts; Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this areal flood warning at Oct 29, 2017, 8:30 PM EDT for Franklin County, Hampden County, Hampshire County, Massachusetts; Capitol Planning Region, Connecticut. It was in force for 10 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, 2017, 8:30 PM EDT (00:30 UTC)
Expired: Oct 30, 2017, 6:30 AM EDT
In force: 10 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Capitol Planning Region, CT, Franklin County, MA, Hampden County, MA, Hampshire County, MA

The radar

The Boston radar (KBOX), 125 km from the middle of the area, began a volume at 00:31 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

Albany, NY (KALY), launched 00:00Z, 0.5 hours before the alert went out and 113 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: 594 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 354 m²/s²
0-3 km storm-relative helicity: 400 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 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 Oct 29, 7:28 PM EDT, 1 hour 2 minutes earlier.

Area forecast discussion, Oct 29, 7:28 PM EDT, 1 hour 2 minutes before

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Hazardous weather outlook, Oct 29, 1:09 PM EDT, 7 hours 21 minutes before

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In the hours before

Local storm report, Oct 29, 8:00 PM EDT, 30 minutes before

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Local storm report, Oct 29, 8:02 PM EDT, 28 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, 10:05 PM EDT	Areal Flood Warning	BOX	Bristol	6 hr
Oct 29, 11:04 PM EDT	Areal Flood Warning	BOX	Franklin, Hampden, Hampshire, Middlesex, Norfolk, Worcester	6 hr
Oct 29, 11:43 PM EDT	Special Weather Statement	BOX	Dukes, Nantucket	77 min
Oct 30, 12:24 AM EDT	Areal Flood Warning	BOX	Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk	3 hr
Oct 30, 2:16 AM EDT	River Flood Warning	BOX	Worcester	23 hr
Oct 30, 2:26 AM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk, Worcester	3 hr
Oct 30, 2:40 AM EDT	Areal Flood Warning	BOX	Barnstable, Dukes, Nantucket	4 hr
Oct 30, 3:05 AM EDT	Flash Flood Warning	BOX	Bristol	115 min
Oct 30, 3:58 AM EDT	Areal Flood Warning	BOX	Bristol	3 hr
Oct 30, 4:07 AM EDT	Gale Warning	BOX		16 hr
Oct 30, 4:08 AM EDT	Areal Flood Warning	BOX	Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk	112 min
Oct 30, 4:15 AM EDT	Wind Advisory	BOX	Barnstable, Bristol, Dukes, Essex, Franklin, Hampden and 7 more	13 hr
Oct 30, 4:21 AM EDT	Areal Flood Warning	BOX	Middlesex, Norfolk, Worcester	3 hr
Oct 30, 6:07 AM EDT	Storm Warning	BOX		7 hr
Oct 30, 9:01 AM EDT	River Flood Warning	BOX	Worcester	12 hr
Oct 30, 7:43 PM EDT	Small Craft Advisory	BOX		30 hr
Oct 30, 1:19 AM EDT	River Flood Warning	BOX	Washington	27 hr

Nearby

Areal Flood Warnings in Massachusetts, 2017 Areal Flood Warnings in Connecticut, 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.