Alert archive / Rhode Island / Flash Flood Warnings in 2018

Flash Flood Warning 17, NWS Boston/Norton, MA

August 4, 2018Bristol County, Massachusetts; 5 counties in Rhode Island

NWS Boston/Norton, MA issued this flash flood warning at Aug 4, 2018, 11:31 AM EDT for Bristol County, Massachusetts; 5 counties in Rhode Island. It was in force for 3 hr. 2 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: Aug 4, 2018, 11:31 AM EDT (15:31 UTC)
Expired: Aug 4, 2018, 2:20 PM EDT
In force: 3 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Bristol County, MA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 63 km from the middle of the area, began a volume at 15:32 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
Aug 4, 11:36 AM EDT	FLOOD	Cranston, RI	WILBUR AVENUE AT OAKLAWN AVENUE...CAR STUCK IN FLOOD WATERS AT THE UNDERPASS.
Aug 4, 2:00 PM EDT	FLOOD	Barrington, RI	MANY ROADS FLOODED IN THE AREA...SOME WITH 1 TO 1.5 FEET OF WATER.

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, 3.5 hours before the alert went out and 126 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: 1326 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 507 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

964 
WGUS51 KBOX 041531
FFWBOX
MAC005-RIC001-003-005-007-009-041830-
/O.NEW.KBOX.FF.W.0017.180804T1531Z-180804T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
1131 AM EDT SAT AUG 4 2018

The National Weather Service in Boston/Norton has issued a

* Flash Flood Warning for...
  West central Bristol County in southeastern Massachusetts...
  Washington County in Rhode Island...
  Western Newport County in Rhode Island...
  Kent County in Rhode Island...
  Southern Providence County in Rhode Island...
  Bristol County in Rhode Island...

* Until 230 PM EDT.

* At 1130 AM EDT...Doppler radar indicated heavy rain across the 
  warned area. Up to one inch of rain has already fallen.
  Flash flooding is expected to begin shortly especially in the 
  urban centers.

* Some locations that will experience flooding include...
  Providence, Warwick, Cranston, Pawtucket, Taunton, East Providence,
  Coventry, North Providence, South Kingstown, West Warwick,
  Johnston, North Kingstown, Bristol, Westerly, Smithfield, Lincoln,
  Central Falls, Barrington, Narragansett and Swansea.

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 4141 7185 4142 7180 4188 7179 4189 7117
      4148 7135 4134 7183

$$

Frank

1 follow-up statement

719 
WGUS71 KBOX 041820
FFSBOX

Flash Flood Statement
National Weather Service Boston/Norton MA
220 PM EDT SAT AUG 4 2018

MAC005-RIC001-003-005-007-009-041829-
/O.CAN.KBOX.FF.W.0017.000000T0000Z-180804T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bristol MA-Washington RI-Newport RI-Kent RI-Providence RI-Bristol RI-
220 PM EDT SAT AUG 4 2018

...THE FLASH FLOOD WARNING FOR WEST CENTRAL BRISTOL...WASHINGTON...
WESTERN NEWPORT...KENT...SOUTHERN PROVIDENCE AND BRISTOL COUNTIES IS
CANCELLED...

The heavy rain has ended. Additional flooding is no longer expected 
to pose a threat. Please continue to heed any remaining road 
closures.

LAT...LON 4141 7185 4142 7180 4188 7179 4189 7117
      4148 7135 4134 7183

$$

Frank

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 5:56 AM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire	49 min
Aug 4, 7:02 AM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire	58 min
Aug 4, 7:53 AM EDT	Areal Flood Advisory	BOX	Hampden	3 hr
Aug 4, 8:48 AM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire, Worcester	3 hr
Aug 4, 9:31 AM EDT	Severe Thunderstorm Warning	BOX	Worcester	44 min
Aug 4, 9:35 AM EDT	Tornado Warning	BOX	Worcester	25 min
Aug 4, 9:57 AM EDT	Tornado Warning	BOX	Worcester	32 min
Aug 4, 10:00 AM EDT	Areal Flood Advisory	BOX	Bristol, Middlesex, Norfolk, Worcester	2 hr
Aug 4, 10:07 AM EDT	Tornado Warning	BOX	Middlesex, Worcester	38 min
Aug 4, 10:24 AM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk, Worcester	106 min
Aug 4, 10:54 AM EDT	Areal Flood Advisory	BOX	Bristol, Essex, Middlesex, Norfolk, Suffolk	2 hr
Aug 4, 11:14 AM EDT	Areal Flood Advisory	BOX	Barnstable, Bristol, Norfolk, Plymouth	3 hr
Aug 4, 11:23 AM EDT	Flash Flood Warning	BOX	Essex, Middlesex, Norfolk, Suffolk	93 min
Aug 4, 11:43 AM EDT	Special Weather Statement	BOX	Suffolk	47 min
Aug 4, 11:46 AM EDT	Special Marine Warning	BOX		119 min
Aug 4, 12:08 PM EDT	Flash Flood Warning	BOX	Bristol, Plymouth	3 hr
Aug 4, 1:46 PM EDT	Special Marine Warning	BOX		44 min
Aug 4, 1:47 PM EDT	Special Marine Warning	BOX		43 min
Aug 4, 2:17 PM EDT	Flash Flood Warning	BOX	Bristol, Plymouth	113 min
Aug 4, 2:42 PM EDT	Flash Flood Warning	BOX	Bristol, Plymouth	45 min
Aug 4, 4:10 PM EDT	Special Marine Warning	BOX		35 min
Aug 4, 4:26 PM EDT	Special Weather Statement	BOX	Dukes	34 min
Aug 4, 4:30 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Dukes	45 min
Aug 4, 4:40 PM EDT	Special Marine Warning	BOX		35 min
Aug 4, 5:14 PM EDT	Special Marine Warning	BOX		15 min
Aug 4, 5:18 PM EDT	Special Weather Statement	BOX	Barnstable	42 min
Aug 4, 5:23 PM EDT	Areal Flood Advisory	BOX	Barnstable	2 hr
Aug 4, 5:36 PM EDT	Special Weather Statement	BOX	Middlesex	39 min
Aug 4, 6:09 PM EDT	Special Weather Statement	BOX	Worcester	51 min
Aug 4, 6:36 PM EDT	Special Weather Statement	BOX	Hampden	39 min
Aug 4, 6:58 PM EDT	Special Weather Statement	BOX	Worcester	47 min
Aug 4, 1:54 PM EDT	Special Weather Statement	BOX	Newport	66 min

Nearby

Flash Flood Warnings in Rhode Island, 2018 Flash Flood Warnings in Massachusetts, 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.