Alert archive / Massachusetts / Areal Flood Warnings in 2011

Areal Flood Warning 22, NWS Boston/Norton, MA

September 29, 2011Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this areal flood warning at Sep 29, 2011, 12:49 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 4 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: Sep 29, 2011, 12:49 PM EDT (16:49 UTC)
Expired: Sep 29, 2011, 4:45 PM EDT
In force: 4 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

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 16:52 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, 4.8 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: 59 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 68 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 Sep 28, 7:28 PM EDT, 17 hours 21 minutes earlier.

Area forecast discussion, Sep 28, 7:28 PM EDT, 17 hours 21 minutes before

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Hazardous weather outlook, Sep 28, 4:36 PM EDT, 20 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
Sep 28, 8:52 PM EDT	Small Craft Advisory for Hazardous Seas	BOX		19 hr
Sep 28, 9:21 PM EDT	Areal Flood Advisory	BOX	Hampden	3 hr
Sep 28, 10:58 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire	3 hr
Sep 29, 9:11 AM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire	3 hr
Sep 29, 1:56 PM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire	2 hr
Sep 29, 3:03 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampshire	86 min
Sep 29, 4:07 PM EDT	Small Craft Advisory for Hazardous Seas	BOX		23 hr
Sep 29, 5:06 PM EDT	Special Marine Warning	BOX		54 min
Sep 29, 5:16 PM EDT	Special Weather Statement	BOX	Franklin, Hampshire	44 min
Sep 29, 5:32 PM EDT	Areal Flood Warning	BOX	Franklin, Hampden, Hampshire	5 hr
Sep 29, 5:56 PM EDT	Special Weather Statement	BOX	Franklin	64 min
Sep 29, 6:08 PM EDT	Special Marine Warning	BOX		52 min
Sep 29, 6:34 PM EDT	Special Marine Warning	BOX		56 min
Sep 29, 6:41 PM EDT	Special Marine Warning	BOX		64 min
Sep 29, 6:51 PM EDT	Special Weather Statement	BOX	Barnstable	39 min
Sep 29, 7:24 PM EDT	Special Marine Warning	BOX		66 min

Nearby

Areal Flood Warnings in Massachusetts, 2011 Every areal flood warning in 2011

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.