Alert archive / Massachusetts / Flash Flood Warnings in 2016

Flash Flood Warning 8, NWS Boston/Norton, MA

October 21, 20165 counties in Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Oct 21, 2016, 9:58 PM EDT for 5 counties in Massachusetts. It was in force for 2 hr. 24 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Oct 21, 2016, 9:58 PM EDT (01:58 UTC)
Expired
Oct 22, 2016, 12:00 AM EDT
In force
2 hr
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Flood severity
None

Counties Essex County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA

The radar

The Boston radar (KBOX), 85 km from the middle of the area, began a volume at 01:58 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.

What was reported inside it

TimeReportWhereRemark
Oct 21, 10:01 PM EDTFLASH FLOODHaverhill, MATHE INTERSECTION OF LAUREL AVENUE AND RAILROAD AVENUE WAS CLOSED DUE TO FOUR FEET OF FLOODING. A CAR WAS STUCK IN FLOOD WATERS. THE INTERSECTION OF PRIMROSE AND DEXTER WAS IMPASSABLE DUE TO FLOODING.
Oct 21, 10:06 PM EDTFLOODBoston, MA2 PEOPLE WERE RESCUED FROM A CAR STUCK IN 2 FEET OF WATER ON MALCOLM X BOULEVARD.
Oct 21, 10:06 PM EDTFLOODLexington, MALINCOLN STREET NEAR TEMPLE ISAIAH/LINCOLN FIELDS AND MERRITT ROAD/ROUTE 2 WERE FLOODED OUT.
Oct 21, 10:22 PM EDTFLOODBelmont, MACOMMON STREET WAS CLOSED NEAR ROYAL ROAD BECAUSE OF FLOODING.
Oct 21, 10:33 PM EDTFLOODMethuen, MARIVERSIDE DRIVE BY THE BOAT RAMP IS CLOSED DUE TO FLOODING. SEVERAL CARS ABANDONED.
Oct 21, 10:35 PM EDTFLOODLynnfield, MACAR STUCK IN 2 FEET OF FLOOD WATER ON MERROW ROAD.
Oct 21, 10:36 PM EDTFLOODChelsea, MAFLOODING ON EVERETT AVENUE FROM THE HIGH SCHOOL TO BEECH STREET.
Oct 21, 10:36 PM EDTFLOODPeabody, MAALLENS LANE AT PERKINS FLOODED. WALNUT STREET AT CENTRAL STREET IMPASSABLE.
Oct 21, 10:40 PM EDTFLOODMethuen, MAROUTE 213 AT ROUTE 495 IS CLOSED DUE TO FLOODING. SEVERAL CARS ARE STUCK IN THE ROADWAY.
Oct 21, 10:42 PM EDTFLOODBoston, MA30 YARDS OF CONTINUOUS SIGNIFICANT FLOODING AT COLUMBIA AND RIDGEFIELD STREETS.
Oct 21, 10:42 PM EDTFLOODMethuen, MAFORD STREET IS CLOSED DUE TO FLOODING.
Oct 21, 10:44 PM EDTFLOODMethuen, MARIVERSIDE DRIVE CLOSED DUE TO FLOODING NEAR THE BOAT RAMP.
Oct 21, 10:45 PM EDTFLOODMethuen, MAROUTE 213 AT I-495...SEVERAL CARS STRANDED IN FLOOD WATERS. ROAD ALSO CLOSED.
Oct 21, 10:47 PM EDTFLOODLynnfield, MAMAIN STREET AT LOWELL STREET FLOODED AND IMPASSABLE.
Oct 21, 10:50 PM EDTFLOODPeabody, MAPROSPECT STREET BETWEEN THE FIRE STATION AND NORTH SHORE MALL FLOODED AND NEARLY IMPASSABLE.
Oct 21, 10:51 PM EDTFLOODPeabody, MAFOSTER AND TREMONT STREETS FLOODED.
Oct 21, 10:52 PM EDTFLOODBoston, MAALEWIFE STATION WAS FLOODED WITH RAIN WATER.
Oct 21, 10:53 PM EDTFLOODEverett, MAPEAPLE TRAPPED INSIDE CARS DUE TO FLOODING ON VALE STREET.
Oct 21, 10:55 PM EDTFLOODMethuen, MAEXIT 3 ON ROUTE 213 EASSTBOUND CLOSED DUE TO FLOODING.
Oct 21, 10:57 PM EDTFLOODPeabody, MAFOSTER STREET CLOSED DUE TO FLOODING.
Oct 21, 10:59 PM EDTFLOODLynn, MABOSTON STREET CLOSED DUE TO FLOODING.
Oct 21, 11:00 PM EDTFLOODMattapan, MAHARVARD BETWEEN WALK HILL AND MCCLEELLAND HIGHWAY IMPASSABLE...MAINLY TO LOW CLEARANCE CARS.
Oct 21, 11:10 PM EDTFLOODPeabody, MAMARGIN STREET FLOODED.
Oct 21, 11:15 PM EDTFLOODDanvers, MAWILDWOOD ROAD FLOODED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Chatham, MA (KCHH), launched 00:00Z, 2.0 hours before the alert went out and 137 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 2016-10-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 349 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 00:00Z on 2016-10-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.19395878Sfc1 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
349 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
566 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

374 
WGUS51 KBOX 220158
FFWBOX
MAC009-017-021-023-025-220400-
/O.NEW.KBOX.FF.W.0008.161022T0158Z-161022T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
958 PM EDT FRI OCT 21 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ESSEX COUNTY IN NORTHEASTERN MASSACHUSETTS...
  NORTH CENTRAL PLYMOUTH COUNTY IN SOUTHEASTERN MASSACHUSETTS...
  NORTHEASTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
  NORTHEASTERN MIDDLESEX COUNTY IN NORTHEASTERN MASSACHUSETTS...

* UNTIL MIDNIGHT EDT

* AT 956 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO 1.50 INCHES OF RAIN HAS
  ALREADY FALLEN IN SOME LOCATIONS.  AN ADDITIONAL 1 TO 2 INCHES
  OF RAIN IS EXPECTED. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BOSTON...CAMBRIDGE...QUINCY...LYNN...NEWTON...LAWRENCE...
  SOMERVILLE...HAVERHILL...WALTHAM...MALDEN...BROOKLINE...MEDFORD...
  WEYMOUTH...REVERE...PEABODY...METHUEN...ARLINGTON...EVERETT...SALEM
  AND BILLERICA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 4287 7082 4283 7081 4281 7087 4280 7085
      4282 7082 4280 7081 4282 7059 4280 7051
      4241 7065 4239 7068 4237 7066 4216 7073
      4216 7123 4274 7125 4274 7119 4281 7116
      4282 7113 4281 7107 4286 7103 4289 7093

$$

FRANK
1 follow-up statement
881 
WGUS71 KBOX 220407
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1207 AM EDT SAT OCT 22 2016

MAC009-017-021-023-025-220416-
/O.EXP.KBOX.FF.W.0008.000000T0000Z-161022T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ESSEX MA-PLYMOUTH MA-NORFOLK MA-SUFFOLK MA-MIDDLESEX MA-
1207 AM EDT SAT OCT 22 2016

...THE FLASH FLOOD WARNING FOR ESSEX...NORTH CENTRAL PLYMOUTH...
NORTHEASTERN NORFOLK...SUFFOLK AND NORTHEASTERN MIDDLESEX COUNTIES
HAS EXPIRED...

THE HEAVY RAIN HAS ENDED, BUT SOME AREAS MAY REMAIN FLOODED. PLEASE
CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4287 7082 4283 7081 4281 7087 4280 7085
      4282 7082 4280 7081 4282 7059 4280 7051
      4241 7065 4239 7068 4237 7066 4216 7073
      4216 7123 4274 7125 4274 7119 4281 7116
      4282 7113 4281 7107 4286 7103 4289 7093

$$

MD

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 21, 8:08 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Suffolk52 min
Oct 21, 8:11 PM EDTAreal Flood WarningBOXMiddlesex, Norfolk, Worcester2 hr
Oct 21, 8:28 PM EDTFlash Flood WarningBOXMiddlesex, Norfolk, Worcester2 hr
Oct 21, 9:01 PM EDTAreal Flood WarningBOXWorcester3 hr
Oct 21, 9:17 PM EDTAreal Flood WarningBOXEssex, Middlesex, Norfolk, Plymouth, Suffolk3 hr
Oct 21, 10:11 PM EDTAreal Flood AdvisoryBOXBarnstable, Bristol, Dukes, Norfolk, Plymouth2 hr
Oct 22, 4:04 AM EDTWind AdvisoryBOXBarnstable, Bristol, Dukes, Essex, Franklin, Hampden and 7 more38 hr

Nearby

Flash Flood Warnings in Massachusetts, 2016Every flash flood warning in 2016

Sources

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