Alert archive / Rhode Island / Flash Flood Warnings in 2008

Flash Flood Warning 13, NWS Boston/Norton, MA

August 11, 2008Kent County, Providence County, Washington County, Rhode Island; Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this flash flood warning at Aug 11, 2008, 5:16 PM EDT for Kent County, Providence County, Washington County, Rhode Island; Northeastern Connecticut Planning Region, Connecticut. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 11, 2008, 5:16 PM EDT (21:16 UTC)
Expired: Aug 11, 2008, 7:15 PM EDT
In force: 119 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, Washington County, RI

The radar

The Boston radar (KBOX), 70 km from the middle of the area, began a volume at 21:19 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.3 hours before the alert went out and 120 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: 263 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS51 KBOX 112116
FFWBOX
CTC015-RIC003-007-009-112315-
/O.NEW.KBOX.FF.W.0013.080811T2116Z-080811T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
516 PM EDT MON AUG 11 2008

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN KENT COUNTY IN RHODE ISLAND...
  SOUTHWESTERN PROVIDENCE COUNTY IN RHODE ISLAND...
  NORTHWESTERN WASHINGTON COUNTY IN RHODE ISLAND...
  SOUTHEASTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF PLAINFIELD...

* UNTIL 715 PM EDT

* AT 507 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
TORRENTIAL RAINS ASSOCIATED WITH A THUNDERSTORM TRACKING INTO 
NORTHEAST CONNECTICUT AND WEST CENTRAL RHODE ISLAND. THE POTENTIAL 
EXISTS FOR THIS STORM TO PRODUCE A TORRENTIAL ONE HALF TO ONE INCH 
OF RAIN IN 10 MINUTES. FLASH FLOODING IS ANTICIPATED AS THE STORM 
MOVES THROUGH THE AREA. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEST
  GREENWICH...COVENTRY...STERLING...KILLINGLY...DANIELSON...
  CANTERBURY AND BROOKLYN

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY...INCLUDING UNDERPASSES. THE WATER MAY BE TOO DEEP TO ALLOW
VEHICLES TO CROSS SAFELY...OR THE ROADWAY MAY BE UNDERMINED.

LAT...LON 4150 7180 4159 7181 4161 7180 4163 7182
      4163 7192 4162 7193 4163 7203 4166 7210
      4187 7186 4166 7151

$$

NMB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 12:16 AM EDT	Areal Flood Advisory	BOX	Kent, Newport, Providence, Washington	5 hr
Aug 11, 7:31 AM EDT	Areal Flood Advisory	BOX	Kent, Washington	3 hr
Aug 11, 10:06 AM EDT	Areal Flood Warning	BOX	Kent, Washington	6 hr
Aug 11, 10:55 AM EDT	Areal Flood Advisory	BOX	Newport	3 hr
Aug 11, 1:14 PM EDT	Flash Flood Watch	BOX	Kent, Newport, Providence, Washington	15 min
Aug 11, 1:34 PM EDT	Flash Flood Watch	BOX	Bristol, Kent, Newport, Providence, Washington	8 hr
Aug 11, 4:09 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	3 hr
Aug 11, 4:32 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	3 hr

Nearby

Flash Flood Warnings in Rhode Island, 2008 Flash Flood Warnings in Connecticut, 2008 Every flash flood warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.