Alert archive / Massachusetts / Flash Flood Warnings in 2005

Flash Flood Warning 19, NWS Boston/Norton, MA

October 19, 2005Bristol County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Oct 19, 2005, 2:55 PM EDT for Bristol County, Massachusetts. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 19, 2005, 2:55 PM EDT (18:55 UTC)
Expired
Oct 19, 2005, 8:45 PM EDT
In force
6 hr
Issued by
NWS Boston/Norton, MA
Area
Counties, with a storm outline in the text

County Bristol County, MA

The radar

The Boston radar (KBOX), 9 km from the middle of the area, began a volume at 18:59 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

Chatham, MA (KCHH), launched 12:00Z, 6.9 hours before the alert went out and 94 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-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2005-10-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2005-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1166 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KBOX 191858
FFWBOX
MAC005-200045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
255 PM EDT WED OCT 19 2005

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS EXTENDED A

* FLASH FLOOD WARNING FOR...
  CENTRAL BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS
  THIS INCLUDES THE CITY OF TAUNTON

* UNTIL 845 PM EDT

* AS OF 245 PM EDT...THE POTENTIAL CONTINUED TO EXIST FOR FAILURE OF 
THE WHITTENDON POND DAM ON THE MILL RIVER.  LOCAL OFFICIALS REPORT 
THAT ROAD CLOSURES AND EVACUATION ORDERS IN TAUNTON HAVE NOT 
CHANGED.  

THE WHITTENTON POND DAM IS 12 FEET HIGH. IF THIS DAM FAILED...AN 
APPROXIMATELY 8 FOOT FLOOD WAVE WOULD OCCUR...WITH A 4 TO 6 FOOT 
FLOOD WAVE INTO PARTS OF TAUNTON THAT ARE DOWNSTREAM.  THIS WOULD 
INCLUDE PARTS OF THE DOWNTOWN AREA. 

THIS IS A VOLATILE AND LIFE THREATENING SITUATION. IF YOU ARE IN AN 
AREA WHERE AN EVACUATION HAS BEEN ORDERED...LEAVE IMMEDIATELY 
PEOPLE BELOW THE DAM SHOULD TAKE IMMEDIATE ACTION BY MONITORING 
LOCAL RADIO OR TELEVISION AND FOLLOWING INSTRUCTIONS FOR ANY 
REQUIRED EVACUATION AS OUTLINED BY LOCAL EMERGENCY OFFICIALS.

LAT...LON 4193 7102 4186 7099 4184 7106 4187 7117
      4196 7114

$$

NMB

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 18, 9:16 PM EDTFlash Flood WarningBOXBristol13 hr
Oct 19, 10:25 AM EDTFlash Flood WarningBOXBristol6 hr

Nearby

Flash Flood Warnings in Massachusetts, 2005Every flash flood warning in 2005

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.