Alert archive / Massachusetts / Flood Watches in 2006

Flood Watch 7, NWS Boston/Norton, MA

July 20, 20066 counties in Massachusetts; 5 counties in Rhode Island

NWS Boston/Norton, MA issued this flood watch at Jul 20, 2006, 3:33 PM EDT for 6 counties in Massachusetts; 5 counties in Rhode Island. It took effect at Jul 20, 2006, 6:00 PM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jul 20, 2006, 3:33 PM EDT (19:33 UTC)
In effect from: Jul 20, 2006, 6:00 PM EDT
Expired: Jul 21, 2006, 4:34 AM EDT
In force: 11 hr
Issued by: NWS Boston/Norton, MA
Flood severity: None

Counties Barnstable County, MA, Bristol County, MA, Dukes County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 33 km from the middle of the area, began a volume at 19:35 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, 7.6 hours before the alert went out and 88 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: 5 J/kg
Mixed-layer CIN: -180 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 34 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 flood watch 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 flood watch went out at Jul 20, 3:25 PM EDT, 8 minutes earlier.

Area forecast discussion, Jul 20, 3:25 PM EDT, 8 minutes before

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Hazardous weather outlook, Jul 20, 12:20 PM EDT, 3 hours 13 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
Jul 20, 8:51 AM EDT	High Surf Advisory	BOX	Barnstable, Bristol, Dukes, Nantucket, Plymouth	33 hr

Nearby

Flood Watches in Massachusetts, 2006 Flood Watches in Rhode Island, 2006 Every flood watch in 2006

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.