Alert archive / Connecticut / Flash Flood Warnings in 2020

Flash Flood Warning 5, NWS Boston/Norton, MA

June 28, 2020Northeastern Connecticut Planning Region, Connecticut; Worcester County, Massachusetts; Providence County, Rhode Island

NWS Boston/Norton, MA issued this flash flood warning at Jun 28, 2020, 6:23 PM EDT for Northeastern Connecticut Planning Region, Connecticut; Worcester County, Massachusetts; Providence County, Rhode Island. It was in force for 83 min. 3 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: Jun 28, 2020, 6:23 PM EDT (22:23 UTC)
Expired: Jun 28, 2020, 7:46 PM EDT
In force: 83 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Northeastern Connecticut Planning Region, CT, Worcester County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 48 km from the middle of the area, began a volume at 22:23 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
Jun 28, 6:45 PM EDT	FLOOD	Burrillville, RI	HARRISVILLE FIRE DEPARTMENT IS RESPONDING TO WATER EMERGENCY CALLS.
Jun 28, 6:48 PM EDT	FLOOD	Burrillville, RI	CAR STUCK IN FLOOD WATERS ON VICTORY HIGHWAY, WHICH WAS FLOODED AND IMPASSABLE BETWEEN OAKLAND SCHOOL STREET AND REMINGTON AVENUE.
Jun 28, 6:54 PM EDT	FLOOD	Burrillville, RI	ONE FOOT OF STREET FLOODING REPORTED ON MAIN STREET IN THE HARRISVILLE SECTION.

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

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 10.4 hours before the alert went out and 148 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 926 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

614 
WGUS51 KBOX 282223
FFWBOX
CTC015-MAC027-RIC007-290030-
/O.NEW.KBOX.FF.W.0005.200628T2223Z-200629T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
623 PM EDT Sun Jun 28 2020

The National Weather Service in Boston/Norton has issued a

* Flash Flood Warning for...
  Northeastern Windham County in northern Connecticut...
  Southeastern Worcester County in central Massachusetts...
  Northwestern Providence County in Rhode Island...

* Until 830 PM EDT.

* At 623 PM EDT, Doppler radar and automated gauges indicated
  thunderstorms producing heavy rain across the warned area. Up to
  two inches of rain have already fallen. Flash flooding is ongoing
  or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar and automated gauges.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Woonsocket, Smithfield, Killingly, Webster, Burrillville, Uxbridge,
  North Smithfield, Dudley, Glocester, Putnam, Thompson, Blackstone,
  Douglas, Woodstock, Pomfret and Millville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4204 7151 4193 7151 4189 7176 4191 7201
      4203 7198

FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

1 follow-up statement

866 
WGUS71 KBOX 282346
FFSBOX

Flash Flood Statement
National Weather Service Boston/Norton MA
746 PM EDT Sun Jun 28 2020

CTC015-MAC027-RIC007-282355-
/O.CAN.KBOX.FF.W.0005.000000T0000Z-200629T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Windham CT-Worcester MA-Providence RI-
746 PM EDT Sun Jun 28 2020

...THE FLASH FLOOD WARNING FOR NORTHEASTERN WINDHAM...SOUTHEASTERN
WORCESTER AND NORTHWESTERN PROVIDENCE COUNTIES IS CANCELLED...

The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed any
remaining road closures.

LAT...LON 4204 7151 4193 7151 4189 7176 4191 7201
      4203 7198

$$

Nocera

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 3:30 PM EDT	Special Weather Statement	BOX		45 min
Jun 28, 4:33 PM EDT	Special Weather Statement	BOX		42 min
Jun 28, 5:02 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	58 min
Jun 28, 6:04 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	56 min
Jun 28, 12:51 PM EDT	Special Weather Statement	BOX	Middlesex	39 min
Jun 28, 1:10 PM EDT	Special Weather Statement	BOX	Hampshire	50 min
Jun 28, 1:19 PM EDT	Special Weather Statement	BOX	Suffolk	41 min
Jun 28, 1:26 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex, Norfolk, Plymouth, Suffolk	64 min
Jun 28, 1:31 PM EDT	Special Marine Warning	BOX		89 min
Jun 28, 1:39 PM EDT	Special Weather Statement	BOX	Franklin	51 min
Jun 28, 1:42 PM EDT	Special Weather Statement	BOX	Franklin	63 min
Jun 28, 1:49 PM EDT	Areal Flood Warning	BOX	Essex, Middlesex, Norfolk, Suffolk	116 min
Jun 28, 1:58 PM EDT	Flash Flood Warning	BOX	Essex, Middlesex, Norfolk, Suffolk	3 hr
Jun 28, 2:23 PM EDT	Areal Flood Warning	BOX	Franklin, Hampshire	2 hr
Jun 28, 2:32 PM EDT	Special Weather Statement	BOX	Suffolk	58 min
Jun 28, 2:45 PM EDT	Special Weather Statement	BOX	Hampden	45 min
Jun 28, 2:50 PM EDT	Special Weather Statement	BOX	Essex	55 min
Jun 28, 3:02 PM EDT	Severe Thunderstorm Warning	BOX	Plymouth	35 min
Jun 28, 3:03 PM EDT	Flash Flood Warning	BOX	Norfolk, Plymouth, Suffolk	117 min
Jun 28, 3:07 PM EDT	Special Marine Warning	BOX		83 min
Jun 28, 3:13 PM EDT	Special Weather Statement	BOX	Norfolk	47 min
Jun 28, 3:16 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire, Worcester	59 min
Jun 28, 3:47 PM EDT	Special Weather Statement	BOX	Middlesex	43 min
Jun 28, 4:02 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Plymouth, Suffolk	58 min
Jun 28, 4:11 PM EDT	Areal Flood Warning	BOX	Middlesex, Norfolk, Suffolk	55 min
Jun 28, 4:39 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Worcester	51 min
Jun 28, 4:46 PM EDT	Special Weather Statement	BOX	Hampden	44 min
Jun 28, 4:58 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk, Plymouth, Worcester	62 min
Jun 28, 5:04 PM EDT	Flash Flood Warning Emergency	BOX	Bristol, Middlesex, Norfolk, Plymouth, Worcester	116 min
Jun 28, 5:05 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Worcester	55 min
Jun 28, 5:17 PM EDT	Special Weather Statement	BOX	Franklin, Hampshire	58 min
Jun 28, 5:28 PM EDT	Special Weather Statement	BOX	Nantucket	62 min
Jun 28, 5:34 PM EDT	Flash Flood Warning	BOX	Worcester	108 min
Jun 28, 6:00 PM EDT	River Flood Warning	BOX	Norfolk, Suffolk	2 hr
Jun 28, 6:20 PM EDT	Special Weather Statement	BOX	Hampshire	40 min
Jun 28, 6:35 PM EDT	Special Weather Statement	BOX	Norfolk	55 min
Jun 28, 6:56 PM EDT	Areal Flood Warning	BOX	Bristol, Middlesex, Norfolk, Worcester	2 hr
Jun 28, 6:59 PM EDT	Special Weather Statement	BOX	Worcester	61 min
Jun 28, 7:01 PM EDT	Special Weather Statement	BOX	Bristol	44 min
Jun 28, 7:20 PM EDT	Areal Flood Warning	BOX	Worcester	115 min

Nearby

Flash Flood Warnings in Connecticut, 2020 Flash Flood Warnings in Massachusetts, 2020 Flash Flood Warnings in Rhode Island, 2020 Every flash flood warning in 2020

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.