Alert archive / Massachusetts / Flash Flood Warnings in 2005

Flash Flood Warning 21, NWS Boston/Norton, MA

October 20, 2005Bristol County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Oct 20, 2005, 10:00 AM 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 20, 2005, 10:00 AM EDT (14:00 UTC)
Expired: Oct 20, 2005, 4:00 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 14:03 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, 2.0 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-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: 1184 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -97 m²/s²
0-3 km storm-relative helicity: 133 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 201426
FFWBOX
MAC005-202000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1000 AM EDT THU OCT 20 2005

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CONTINUED A

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

* UNTIL 400 PM EDT

* AT 945 AM 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.  ENGINEERS ARE CURRENTLY WORKING TO RELEASE PRESSURE BEHIND
THE STRUCTURE...BUT UNTIL THE PRESSURE BEHIND THE DAM CAN BE 
LOWERED...EVACUATION ORDERS WILL REMAIN IN PLACE.

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. FOLLOW 
INSTRUCTIONS FOR ANY REQUIRED EVACUATION AS OUTLINED BY LOCAL 
EMERGENCY OFFICIALS.

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

$$

FN/DRV

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 19, 8:45 PM EDT	Flash Flood Warning	BOX	Bristol	13 hr
Oct 20, 3:42 AM EDT	Freeze Warning	BOX	Franklin, Hampden, Hampshire, Middlesex, Worcester	28 hr
Oct 20, 4:00 PM EDT	Flash Flood Warning	BOX	Bristol	4 hr
Oct 20, 7:20 PM EDT	Frost Advisory	BOX	Essex, Hampden, Middlesex, Worcester	13 hr

Nearby

Flash Flood Warnings in Massachusetts, 2005 Every 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.