Alert archive / Massachusetts / Flash Flood Warnings in 2005

Flash Flood Warning 23, NWS Boston/Norton, MA

October 20, 2005Bristol County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Oct 20, 2005, 8:00 PM EDT for Bristol County, Massachusetts. It was in force for 12 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, 8:00 PM EDT (00:00 UTC)
Expired
Oct 21, 2005, 8:00 AM EDT
In force
12 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 00:09 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 00:00Z, 0.0 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-pSkew-T log-p diagram, Chatham, MA at 00:00Z on 2005-10-21Temperature 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 00:00Z on 2005-10-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 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
1560 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
68 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 210000
FFWBOX
MAC005-211200-

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS EXTENDED THE

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

* UNTIL 800 AM EDT FRIDAY

* AT 800 PM EDT...THE POTENTIAL CONTINUED TO EXIST FOR FAILURE OF
  THE WHITTENTON POND DAM ON THE MILL RIVER.

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. 

CONTINUE TO FOLLOW INSTRUCTIONS AS OUTLINED BY LOCAL EMERGENCY 
OFFICIALS.

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

$$

JWD

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 21, 3:44 PM EDTFrost AdvisoryBOXEssex, Middlesex, Norfolk, Worcester16 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.