Alert archive / Connecticut / Flash Flood Warnings in 2012

Flash Flood Warning 11, NWS Boston/Norton, MA

July 28, 2012Northeastern Connecticut Planning Region, Connecticut; Hampden County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jul 28, 2012, 4:01 PM EDT for Northeastern Connecticut Planning Region, Connecticut; Hampden County, Worcester County, Massachusetts. It was in force for 2 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 28, 2012, 4:01 PM EDT (20:01 UTC)
Expired: Jul 28, 2012, 6:06 PM EDT
In force: 2 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Northeastern Connecticut Planning Region, CT, Hampden County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 92 km from the middle of the area, began a volume at 20:05 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.

What was reported inside it

Time	Report	Where	Remark
Jul 28, 4:18 PM EDT	FLASH FLOOD	Stafford, CT	ROUTE 190 AND STAFFORD RD WITH 2 FEET OF WATER - CARS STUCK IN FLOOD WATERS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.0 hours before the alert went out and 114 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: 424 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 705 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

567 
WGUS51 KBOX 282001
FFWBOX
CTC013-015-MAC013-027-282300-
/O.NEW.KBOX.FF.W.0011.120728T2001Z-120728T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
401 PM EDT SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  EASTERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF MANSFIELD...
  WESTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF WILLIMANTIC...
  SOUTHEASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 700 PM EDT

* AT 356 PM EDT...A LINE OF THUNDERSTORMS WITH TORRENTIAL RAINFALL
  WAS MOVING THROUGH SOUTHERN WORCESTER COUNTY AND NORTH CENTRAL
  CONNECTICUT. FLASH FLOODING HAS BEEN REPORTED IN LONGMEADOW 
  MASSACHUSETTS AND IN NEW BRITAIN CONNECTICUT AS THIS LINE HAS MOVED
  THROUGH.

FLASH FLOODING OF SMALL STREAMS AND URBAN AREAS IS OCCURRING OR
IMMINENT. THOSE NEAR STREAMS AND CREEKS...OR IN AREAS PRONE TO
FLOODING SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. AVOID FLOODED
ROADS. THE WATER MAY BE TOO DEEP TO ALLOW VEHICLES TO CROSS SAFELY...
OR THE ROADWAY MAY BE UNDERMINED. TURN AROUND...DONT DROWN!

&&

LAT...LON 4160 7239 4197 7226 4197 7236 4222 7221
      4222 7180 4164 7201 4166 7215 4166 7217
      4171 7224 4169 7226 4167 7227 4164 7233
      4160 7233

$$
FIELD

1 follow-up statement

934 
WGUS71 KBOX 282206
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
606 PM EDT SAT JUL 28 2012

CTC013-015-MAC013-027-282215-
/O.CAN.KBOX.FF.W.0011.000000T0000Z-120728T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOLLAND CT-WINDHAM CT-WORCESTER MA-HAMPDEN MA-
606 PM EDT SAT JUL 28 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN
HAMPDEN...SOUTHWESTERN WORCESTER...WESTERN WINDHAM AND EASTERN
TOLLAND COUNTIES...

WHILE LIGHT TO MODERATE RAIN IS EXPECTED TO CONTINUE IN SOUTHERN 
MASSACHUSETTS AND NORTHERN CONNECTICUT THIS EVENING...THERE IS NO 
LONGER A THREAT FOR FLASH FLOODING.

LAT...LON 4160 7239 4197 7226 4197 7236 4222 7221
      4222 7180 4164 7201 4166 7215 4166 7217
      4171 7224 4169 7226 4167 7227 4164 7233
      4160 7233

$$
FIELD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 3:54 AM EDT	Flash Flood Watch	BOX	Capitol Planning Region	24 hr
Jul 28, 12:46 PM EDT	Special Weather Statement	BOX		59 min
Jul 28, 12:59 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	6 hr
Jul 28, 1:48 PM EDT	Flash Flood Warning	BOX	Capitol Planning Region	117 min
Jul 28, 2:11 PM EDT	Special Weather Statement	BOX		64 min
Jul 28, 2:39 PM EDT	Special Weather Statement	BOX		51 min
Jul 28, 3:00 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	3 hr
Jul 28, 3:18 PM EDT	Areal Flood Advisory	BOX	Northeastern Connecticut Planning Region	3 hr
Jul 28, 3:24 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	3 hr
Jul 28, 3:33 PM EDT	Flash Flood Warning	BOX	Capitol Planning Region	3 hr
Jul 28, 3:44 PM EDT	Flash Flood Warning	BOX	Capitol Planning Region	2 hr
Jul 28, 4:47 PM EDT	Areal Flood Advisory	BOX	Northeastern Connecticut Planning Region	3 hr
Jul 28, 11:50 AM EDT	Special Weather Statement	BOX	Hampden	55 min
Jul 28, 12:50 PM EDT	Special Weather Statement	BOX	Worcester	25 min
Jul 28, 1:35 PM EDT	Flash Flood Warning	BOX	Hampden, Hampshire	3 hr
Jul 28, 2:28 PM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire, Worcester	3 hr
Jul 28, 3:41 PM EDT	Special Weather Statement	BOX	Worcester	49 min
Jul 28, 4:13 PM EDT	Special Weather Statement	BOX	Norfolk	62 min
Jul 28, 6:42 PM EDT	Areal Flood Advisory	BOX	Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk	3 hr
Jul 28, 7:25 PM EDT	Areal Flood Advisory	BOX	Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk	3 hr
Jul 28, 7:31 PM EDT	Flash Flood Warning	BOX	Bristol	59 min

Nearby

Flash Flood Warnings in Connecticut, 2012 Flash Flood Warnings in Massachusetts, 2012 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.