Alert archive / Massachusetts / Areal Flood Advisories in 2012

Areal Flood Advisory 45, NWS Boston/Norton, MA

August 9, 2012Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this areal flood advisory at Aug 9, 2012, 2:53 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 45 min.

The area

The counties it named.

The facts

Issued: Aug 9, 2012, 2:53 PM EDT (18:53 UTC)
Expired: Aug 9, 2012, 3:38 PM EDT
In force: 45 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Hampden County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 123 km from the middle of the area, began a volume at 18:53 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 12:00Z, 6.9 hours before the alert went out and 109 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: 780 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 965 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory 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 advisory went out at Aug 9, 1:58 PM EDT, 55 minutes earlier.

Area forecast discussion, Aug 9, 1:58 PM EDT, 55 minutes before

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Hazardous weather outlook, Aug 9, 4:48 AM EDT, 10 hours 5 minutes before

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In the hours before

Special weather statement, Aug 9, 1:01 PM EDT, 1 hour 52 minutes before

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Special weather statement, Aug 9, 1:06 PM EDT, 1 hour 47 minutes before

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Special weather statement, Aug 9, 1:39 PM EDT, 1 hour 14 minutes before

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Special weather statement, Aug 9, 2:03 PM EDT, 50 minutes before

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Special weather statement, Aug 9, 2:11 PM EDT, 42 minutes before

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Special weather statement, Aug 9, 2:44 PM EDT, 9 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
Aug 9, 1:01 PM EDT	Special Weather Statement	BOX	Franklin	59 min
Aug 9, 1:16 PM EDT	Areal Flood Advisory	BOX	Franklin	108 min
Aug 9, 1:39 PM EDT	Special Weather Statement	BOX	Hampshire	51 min
Aug 9, 1:48 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	32 min
Aug 9, 1:53 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampshire	2 hr
Aug 9, 2:03 PM EDT	Special Weather Statement	BOX	Hampshire	57 min
Aug 9, 2:18 PM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire	53 min
Aug 9, 2:44 PM EDT	Special Weather Statement	BOX	Hampden	46 min
Aug 9, 5:11 PM EDT	Special Weather Statement	BOX	Worcester	64 min
Aug 9, 5:44 PM EDT	Special Weather Statement	BOX	Worcester	61 min
Aug 9, 3:45 PM EDT	Special Weather Statement	BOX		60 min

Nearby

Areal Flood Advisories in Massachusetts, 2012 Every areal flood advisory in 2012

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.