Alert archive / Massachusetts / Flash Flood Warnings in 1996

Flash Flood Warning 37, NWS Boston/Norton, MA

October 21, 1996Plymouth County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Oct 21, 1996, 10:40 AM EDT for Plymouth 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 counties it named.

The facts

Issued: Oct 21, 1996, 10:40 AM EDT (14:40 UTC)
Expired: Oct 21, 1996, 11:00 PM EDT
In force: 12 hr
Issued by: NWS Boston/Norton, MA
Area: Whole counties

County Plymouth County, MA

The radar

The Boston radar (KBOX), 33 km from the middle of the area, began a volume at 14:43 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, 2.7 hours before the alert went out and 73 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: 591 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -79 m²/s²
0-3 km storm-relative helicity: 299 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 
TTAA00 KBOS 211441
FFWBOS
MAC009-017-021-023-025-NHC011-220300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1040 AM EDT MON OCT 21 1996
 
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED
A FLOOD WARNING EFFECTIVE UNTIL 1100 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN  MASSACHUSETTS
 
   ...ESSEX COUNTY...MIDDLESEX COUNTY...NORFOLK COUNTY
   ...PLYMOUTH COUNTY...SUFFOLK COUNTY
 
IN SOUTH NEW HAMPSHIRE
 
   ...HILLSBOROUGH COUNTY
 
HEAVY RAINS CONTINUED TO FALL ACROSS MUCH OF EASTERN MASSACHUSETTS AND
SOUTHEAST NEW HAMPSHIRE. CONSIDERABLE FLOODING CONTINUES IN THESE AREAS.
 
WITH MORE RAINFALL EXPECTED THROUGH THE EARLY AFTERNOON...RUNOFF FROM
THIS EVENT WILL NOT BE COMPLETED UNTIL EARLY TUESDAY.  THEREFORE...FLOOD
WARNINGS ARE BEING EXTENDED FOR THESE COUNTIES FOR THIS AFTERNOON AND
TONIGHT.
 
DETAILED INFORMATION ON THIS EVENT IS BEING PROVIDED IN FLOOD
STATEMENTS.  THE NEXT FLOOD STATEMENT WILL BE ISSUED BY 11 AM.
 
DRV

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 20, 8:39 PM EDT	Flash Flood Warning	BOX	Middlesex	4 hr
Oct 20, 9:34 PM EDT	Flash Flood Warning	BOX	Plymouth	6 hr
Oct 20, 9:45 PM EDT	Flash Flood Warning	BOX	Middlesex	4 hr
Oct 20, 10:00 PM EDT	Flash Flood Warning	BOX	Essex, Middlesex	8 hr
Oct 20, 10:00 PM EDT	Flash Flood Warning	BOX	Norfolk, Suffolk	8 hr
Oct 20, 10:00 PM EDT	Flash Flood Warning	BOX	Plymouth	8 hr
Oct 21, 2:07 AM EDT	Flash Flood Warning	BOX	Middlesex	8 hr
Oct 21, 6:01 AM EDT	Flash Flood Warning	BOX	Essex, Middlesex, Norfolk, Suffolk	6 hr
Oct 21, 6:01 AM EDT	Flash Flood Warning	BOX	Plymouth	6 hr
Oct 21, 10:40 AM EDT	Flash Flood Warning	BOX	Essex, Middlesex	12 hr
Oct 21, 10:40 AM EDT	Flash Flood Warning	BOX	Norfolk, Suffolk	12 hr

Nearby

Flash Flood Warnings in Massachusetts, 1996 Every flash flood warning in 1996

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.