Alert archive / Connecticut / Flash Flood Warnings in 2012

Flash Flood Warning 8, NWS Boston/Norton, MA

July 28, 2012Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this flash flood warning at Jul 28, 2012, 1:48 PM EDT for Capitol Planning Region, Connecticut. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 28, 2012, 1:48 PM EDT (17:48 UTC)
Expired: Jul 28, 2012, 3:45 PM EDT
In force: 117 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

County Capitol Planning Region, CT

The radar

The Albany radar (KENX), 119 km from the middle of the area, began a volume at 17:50 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, 5.8 hours before the alert went out and 112 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: 285 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 590 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

351 
WGUS51 KBOX 281748
FFWBOX
CTC003-281945-
/O.NEW.KBOX.FF.W.0008.120728T1748Z-120728T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITIES OF...HARTLAND...GRANBY...SIMSBURY...
  AND WINDSOR LOCKS.

* UNTIL 345 PM EDT

* AT 143 PM EDT...A VERY STRONG THUNDERSTORM WITH TORRENTIAL
  RAINFALL WAS MOVING ACROSS THE WINSTED AREA OF LITCHFIELD COUNTY. 
  RAINFALL RATES OF UP TO 3 INCHES PER HOUR ARE LIKELY WITH THIS
  STORM. THE STORM WAS MOVING TO THE EAST AT 15 MPH.

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 4199 7303 4200 7303 4200 7264 4181 7265
      4181 7295 4188 7295 4190 7294 4190 7292
      4197 7290 4196 7303 4198 7303

$$
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, 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, 4:01 PM EDT	Flash Flood Warning	BOX	Northeastern Connecticut Planning Region	2 hr
Jul 28, 4:47 PM EDT	Areal Flood Advisory	BOX	Northeastern Connecticut Planning Region	3 hr

Nearby

Flash Flood Warnings in Connecticut, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.