Alert archive / Connecticut / Areal Flood Advisories in 2012

Areal Flood Advisory 28, NWS Boston/Norton, MA

July 29, 2012Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this areal flood advisory at Jul 29, 2012, 4:57 PM EDT for Capitol Planning Region, Connecticut. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Jul 29, 2012, 4:57 PM EDT (20:57 UTC)
Expired: Jul 29, 2012, 7:02 PM EDT
In force: 2 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Capitol Planning Region, CT

The radar

The Brookhaven radar (KOKX), 109 km from the middle of the area, began a volume at 20:57 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, 9.0 hours before the alert went out and 142 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: 365 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: -21 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 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 Jul 29, 4:10 PM EDT, 47 minutes earlier.

Area forecast discussion, Jul 29, 4:10 PM EDT, 47 minutes before

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Hazardous weather outlook, Jul 29, 4:12 PM EDT, 45 minutes before

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In the hours before

Special weather statement, Jul 29, 3:18 PM EDT, 1 hour 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
318 PM EDT SUN JUL 29 2012

MAZ010-011-291945-
EASTERN HAMPDEN MA-EASTERN HAMPSHIRE MA-
318 PM EDT SUN JUL 29 2012

AT 315 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL 5 MILES
SOUTH OF BELCHERTOWN...OR ABOUT 9 MILES EAST OF CHICOPEE...MOVING
SOUTHWEST AT 10 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...LUDLOW...WILBRAHAM...WEST
  SPRINGFIELD...SPRINGFIELD...HAMPDEN...EAST LONGMEADOW AND CHICOPEE.

HEAVY RAIN MAY CAUSE MINOR STREET FLOODING AND PONDING OF WATER IN
LOW LYING AREAS SUCH AS UNDERPASSES. DO NOT DRIVE THROUGH FLOODED
ROADS.

&&

LAT...LON 4231 7240 4223 7229 4203 7241 4203 7251
      4213 7269

BELK

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 3:18 PM EDT	Special Weather Statement	BOX	Hampden	27 min

Nearby

Areal Flood Advisories in Connecticut, 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.