Alert archive / Rhode Island / Flash Flood Warnings in 2016

Flash Flood Warning 6, NWS Boston/Norton, MA

October 21, 2016Northeastern Connecticut Planning Region, Connecticut; Kent County, Providence County, Rhode Island

NWS Boston/Norton, MA issued this flash flood warning at Oct 21, 2016, 8:04 PM EDT for Northeastern Connecticut Planning Region, Connecticut; Kent County, Providence County, Rhode Island. It was in force for 116 min. 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: Oct 21, 2016, 8:04 PM EDT (00:04 UTC)
Expired: Oct 21, 2016, 10:00 PM EDT
In force: 116 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Northeastern Connecticut Planning Region, CT, Kent County, RI, Providence County, RI

The radar

The Boston radar (KBOX), 45 km from the middle of the area, began a volume at 00:04 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 21, 8:36 PM EDT	FLOOD	Coventry, RI	THE INTERSECTION OF WASHINGTON STREET AND LAUREL AVENUE WAS CLOSED DUE TO FLOODING.

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 00:00Z, 0.1 hours before the alert went out and 136 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: 349 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 566 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

095 
WGUS51 KBOX 220004
FFWBOX
CTC015-RIC003-007-220200-
/O.NEW.KBOX.FF.W.0006.161022T0004Z-161022T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
804 PM EDT FRI OCT 21 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  KENT COUNTY IN RHODE ISLAND...
  PROVIDENCE COUNTY IN RHODE ISLAND...

* UNTIL 1000 PM EDT

* AT 803 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  PROVIDENCE...WARWICK...CRANSTON...PAWTUCKET...WOONSOCKET...
  COVENTRY...CUMBERLAND...NORTH PROVIDENCE...WEST WARWICK...
  JOHNSTON...NORTH KINGSTOWN...PLAINFIELD...SMITHFIELD...LINCOLN...
  CENTRAL FALLS...KILLINGLY...WEBSTER...BURRILLVILLE...UXBRIDGE AND
  EAST GREENWICH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4164 7179 4165 7184 4203 7186 4202 7180
      4201 7180 4202 7159 4200 7141 4160 7137
      4160 7141 4163 7140 4165 7141 4165 7143
      4162 7149 4160 7149 4160 7179

$$

FRANK

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 22, 4:04 AM EDT	Wind Advisory	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	38 hr
Oct 21, 10:11 PM EDT	Areal Flood Advisory	BOX	Bristol, Newport	2 hr

Nearby

Flash Flood Warnings in Rhode Island, 2016 Flash Flood Warnings in Connecticut, 2016 Every flash flood warning in 2016

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.