Alert archive / Connecticut / Areal Flood Warnings in 2021

Areal Flood Warning 3, NWS Boston/Norton, MA

July 9, 2021Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this areal flood warning at Jul 9, 2021, 12:28 PM EDT for Northeastern Connecticut Planning Region, Connecticut. It was in force for 3 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 9, 2021, 12:28 PM EDT (16:28 UTC)
Expired: Jul 9, 2021, 3:30 PM EDT
In force: 3 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

County Northeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 98 km from the middle of the area, began a volume at 16:33 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 9, 1:00 PM EDT	FLOOD	Tolland, CT	120 TO 130 BLOCK OF SHENIPSIT ROAD FLOODED. 90 BLOCK AND 100 BLOCK OF OLD STANFORD ROAD FLOODED. 70 BLOCK OF CHARTER ROAD HEAVILY FLOODED ON ROADWAY. 70 BLOCK OF SKUNGAMAUG ROAD FLOODED. WATER OVER ROAD ON CIDER MILL ROAD AND GRANT HILL.

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

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 4.5 hours before the alert went out and 169 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: 3 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 764 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

888 
WGUS41 KBOX 091628
FLWBOX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Boston/Norton MA
1228 PM EDT Fri Jul 9 2021

CTC013-015-091930-
/O.NEW.KBOX.FA.W.0003.210709T1628Z-210709T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tolland CT-Windham CT-
1228 PM EDT Fri Jul 9 2021

The National Weather Service in Norton has issued a

* Flood Warning for...
  Tolland County in northern Connecticut...
  Western Windham County in northern Connecticut...

* Until 330 PM EDT.

* At 1228 PM EDT, Doppler radar indicated moderate to heavy rainfall 
  passing through the Warning area. As of 1230 pm, rainfall totals 
  ranged between 1.5 and 3 inches. The Willimantic River and Mount 
  Hope River are experiencing significant rises. Minor flooding is 
  expected during this afternoon along these 2 waterways. Other 
  small streams may crest around bankfull levels during this 
  afternoon as well.

* Some locations that will experience flooding include...
  Mansfield, Windham, Willimantic, Southbridge, Ellington, Tolland, 
  Coventry, Stafford, Hebron, Woodstock, Willington, Columbia, 
  Canterbury, Ashford, Andover, Chaplin, Hampton, Eastford, Scotland 
  and Union.

Additional rainfall amounts up to 1 inch are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4160 7236 4197 7240 4202 7238 4203 7205
      4165 7206 4167 7215 4166 7216 4171 7224
      4170 7225 4169 7227 4167 7227 4167 7228
      4165 7230 4164 7233 4162 7232 4161 7233
      4160 7234

$$

NB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:19 AM EDT	Flash Flood Warning	BOX	Capitol Planning Region	6 hr
Jul 9, 2:24 PM EDT	Areal Flood Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	8 hr
Jul 9, 3:41 PM EDT	Areal Flood Warning	BOX	Northeastern Connecticut Planning Region	5 hr
Jul 9, 7:47 PM EDT	Special Weather Statement	BOX		43 min

Nearby

Areal Flood Warnings in Connecticut, 2021 Every areal flood warning in 2021

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.