Flash Flood Warning 8, NWS Boston/Norton, MA

Issued

Jun 23, 2006, 4:40 PM EDT (20:40 UTC)

Expired

Jun 23, 2006, 8:45 PM EDT

In force

4 hr

Issued by

NWS Boston/Norton, MA

Area

Counties, with a storm outline in the text

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

The Boston radar (KBOX), 42 km from the middle of the area, began a volume at 20:40 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.

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

000 
WGUS51 KBOX 232046
FFWBOX
MAC009-017-021-023-025-240045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
440 PM EDT FRI JUN 23 2006

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN ESSEX COUNTY IN EASTERN MASSACHUSETTS
  THIS INCLUDES THE CITIES OF...LYNN...BEVERLY
  EASTERN MIDDLESEX COUNTY IN EASTERN MASSACHUSETTS
  THIS INCLUDES THE CITIES OF...WALTHAM...SOMERVILLE...NEWTON...
  FRAMINGHAM...CAMBRIDGE
  NORTHEASTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS
  THIS INCLUDES THE CITIES OF...WEYMOUTH...QUINCY...BROOKLINE
  SUFFOLK COUNTY IN EASTERN MASSACHUSETTS
  THIS INCLUDES THE CITY OF BOSTON
  NORTH CENTRAL PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS

* UNTIL 845 PM EDT

* AT 436 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERAL LINES OF THUNDERSTORMS PRODUCING HEAVY RAINFALL.  ONE LINE
  STRETCHES FROM LITTLETON TO IPSWICH AND APPEARS READY TO MERGE     
  WITH A SECOND LINE FROM ASHLAND TO BOSTON.  ANOTHER CLUSTER OF 
  STORMS WAS HITTING NORTHEAST PLYMOUTH COUNTY FROM HANOVER TO 
  HINGHAM. THIS ACTIVITY WAS ALL MOVING SLOWLY SOUTHEAST AT 15 MPH. 

* WIDESPREAD MAJOR URBAN FLASH FLOODING IS LIKELY AS THESE STORMS
  MOVE THROUGH.  THE MERGING OF THUNDERSTORMS FROM ASHLAND TO BOSTON 
  DURING THE NEXT 3 HOURS MAY RESULT IN RAINFALL RATES OF 3 TO 4   
  INCHES AN HOUR.  THE SLOW MOVEMENT OF THE STORMS AFFECTING 
  NORTHEAST PLYMOUTH COUNTY WILL ALSO RESULT IN SIGNIFICANT URBAN 
  FLASH FLOODING. 

THIS IS WILL HAVE A TREMENDOUS IMPACT ON THE LATE AFTERNOON AND 
EVENING RUSH HOUR PRODUCING SIGNIFICANT STREET AND POOR DRAINAGE 
FLASH FLOODING.  SOME SUBWAY FLOODING IS LIKELY AND NUMEROUS ROAD 
CLOSERS WILL LIKELY RESULT.  

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

THIS IS DEVELOPING INTO A VERY SERIOUS URBAN FLASH FLOOD SITUATION. 
PLEASE KEEP IN MIND THAT MOST FLOOD RELATED DEATHS OCCUR IN 
AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS... 
OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A 
SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

LAT...LON 4222 7151 4220 7120 4221 7105 4209 7091
      4219 7072 4224 7077 4239 7082 4268 7081
      4266 7118 4254 7146

$$

VALLEE

000 
WGUS71 KBOX 232209
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
608 PM EDT FRI JUN 23 2006

MAC009-017-021-023-025-240045-
ESSEX MA-NORFOLK MA-PLYMOUTH MA-SUFFOLK MA-MIDDLESEX MA-
608 PM EDT FRI JUN 23 2006

...A FLASH FLOOD WARNING CONTINUES UNTIL 845 PM EDT FOR EASTERN
MIDDLESEX...SUFFOLK...NORTH CENTRAL PLYMOUTH...NORTHEASTERN NORFOLK
AND SOUTHWESTERN ESSEX COUNTIES...

AT 605 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A BROAD AREA OF SHOWERS AND A FEW SCATTERED THUNDERSTORMS 
FROM TOPSFIELD AND BEVERLY SOUTH AND WEST TO HINGHAM AND DEDHAM.  
THE ACTIVITY WAS MOVING SLOWLY EAST AT 15 TO 20 MPH. 

WHILE RAINFALL RATES HAVE DIMINISHED SOME IN THE PAST HOUR...RUNOFF 
FROM THE TORRENTIAL RAINS WILL BE CAPABLE OF PRODUCING SOME 
LOCALIZED FLASH FLOODING ON SMALL STREAMS...AS WELL AS MORE 
WIDESPREAD URBAN AND POOR DRAINAGE FLOODING THROUGH THE EVENING 
HOURS. ADDITIONAL THUNDERSTORMS WERE MOVING THROUGH EASTERN 
WORCESTER COUNTY AND WILL MOVE OVER THE WARNING AREA DURING THE NEXT 
2 HOURS PRODUCING LOCALIZED HEAVY DOWNPOURS.  

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.  TRY TO AVOID 
FLOODED AREAS.  IF YOU DO HAVE TRAVEL PLANS THIS EVENING...YOU MAY 
WANT TO WAIT ANOTHER HOUR OR TWO BEFORE HEADING OUT.  THE HEAVY 
RAINS HAVE PRODUCED CONSIDERABLE FLOODING IN PORTIONS OF THE BOSTON 
METROPOLITAN AREA AS WELL AS ON SOME OF THE MAJOR ROADS AND HIGHWAYS 
FROM THE SOUTH SHORE NORTHWARD INTO SOUTHEAST ESSEX COUNTY. 

$$

VALLEE

Flash Flood Warnings in Massachusetts, 2006Every flash flood warning in 2006

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.