Alert archive / Connecticut / Flash Flood Warnings in 2018

Flash Flood Warning 36, NWS Boston/Norton, MA

October 2, 2018Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this flash flood warning at Oct 2, 2018, 6:10 PM EDT for Capitol Planning Region, Connecticut. It was in force for 2 hr. 4 reports 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: Oct 2, 2018, 6:10 PM EDT (22:10 UTC)
Expired: Oct 2, 2018, 8:31 PM EDT
In force: 2 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

County Capitol Planning Region, CT

The radar

The Brookhaven radar (KOKX), 85 km from the middle of the area, began a volume at 22:09 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
Oct 2, 6:22 PM EDT	FLOOD	Newington, CT	MAIN STREET AND DOWD AVE FLOODED AND IMPASSABLE. CLOSED DUE TO FLOODING.
Oct 2, 6:32 PM EDT	FLOOD	Newington, CT	SECTION OF ATWOOD STREET CLOSED DUE TO FLOODING
Oct 2, 6:43 PM EDT	FLOOD	Bristol, CT	SECTION OF ROUTE 72 HAS ABOUT A FOOT OF STANDING WATER
Oct 2, 8:06 PM EDT	HEAVY RAIN 2.19	Newington, CT

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, 10.2 hours before the alert went out and 85 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: 54 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 563 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

655 
WGUS51 KBOX 022210
FFWBOX
CTC003-013-030115-
/O.NEW.KBOX.FF.W.0036.181002T2210Z-181003T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
610 PM EDT TUE OCT 2 2018

The National Weather Service in Boston/Norton has issued a

* Flash Flood Warning for...
  Southwestern Tolland County in northern Connecticut...
  Southern Hartford County in northern Connecticut...

* Until 915 PM EDT.

* At 609 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing 
  especially around the New Britain, CT region. 

* Some locations that will experience flooding include...
  Hartford, New Britain, West Hartford, Meriden, Bristol, East
  Hartford, Southington, Glastonbury, Newington, Wethersfield,
  Farmington, Wolcott, Colchester, East Hampton, Berlin, Rocky Hill,
  Avon, Plainville, Cromwell and Hebron.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Warning means that flooding will occur quickly, and
could be life threatening for those who try to drive through flooded
roads or underpasses. Find alternate routes. Those near small streams
need to get to higher ground immediately.

&&

LAT...LON 4167 7227 4164 7233 4160 7234 4159 7239
      4160 7241 4158 7246 4164 7250 4163 7271
      4158 7276 4155 7282 4157 7285 4155 7285
      4156 7288 4156 7295 4163 7293 4164 7294
      4164 7299 4179 7302

$$

Sipprell

1 follow-up statement

778 
WGUS71 KBOX 030031
FFSBOX

Flash Flood Statement
National Weather Service Boston/Norton MA
831 PM EDT TUE OCT 2 2018

CTC003-013-030040-
/O.CAN.KBOX.FF.W.0036.000000T0000Z-181003T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tolland CT-Hartford CT-
831 PM EDT TUE OCT 2 2018

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN TOLLAND AND SOUTHERN
HARTFORD COUNTIES IS CANCELLED...

Flood waters are receding. A flood advisory has been issued to 
address andy lingering urban and poor drainage flooding. Please 
continue to heed any remaining road closures.

LAT...LON 4167 7227 4164 7233 4160 7234 4159 7239
      4160 7241 4158 7246 4164 7250 4163 7271
      4158 7276 4155 7282 4157 7285 4155 7285
      4156 7288 4156 7295 4163 7293 4164 7294
      4164 7299 4179 7302

$$

Sipprell

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 2, 4:16 PM EDT	Special Weather Statement	BOX		44 min
Oct 2, 5:08 PM EDT	Special Weather Statement	BOX		37 min
Oct 2, 5:26 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	3 hr
Oct 2, 5:29 PM EDT	Special Weather Statement	BOX		46 min
Oct 2, 5:35 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	25 min
Oct 2, 5:55 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	35 min

Nearby

Flash Flood Warnings in Connecticut, 2018 Every flash flood warning in 2018

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.