Alert archive / Massachusetts / Flash Flood Warnings in 2005

Flash Flood Warning 2, NWS Boston/Norton, MA

July 6, 2005Middlesex County, Suffolk County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Jul 6, 2005, 2:11 PM EDT for Middlesex County, Suffolk County, Massachusetts. It was in force for 3 hr. 2 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: Jul 6, 2005, 2:11 PM EDT (18:11 UTC)
Expired: Jul 6, 2005, 5:15 PM EDT
In force: 3 hr
Issued by: NWS Boston/Norton, MA
Area: Counties, with a storm outline in the text

Counties Middlesex County, MA, Suffolk County, MA

The radar

The Boston radar (KBOX), 43 km from the middle of the area, began a volume at 18:13 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

Time	Report	Where	Remark
Jul 6, 2:20 PM EDT	FLOOD	Boston, MA	STORROW DRIVE CLOSED EAST AND WEST BOUND AT KENMORE SQUARE
Jul 6, 3:25 PM EDT	FLOOD	Boston, MA	SIGNIFICANT FLOODING ON GREENOUGH BLVD. WATERTOWN ROAD CLOSED DUE TO FLOODING.

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 12:00Z, 6.2 hours before the alert went out and 119 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: 1 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 815 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 36 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 061813
FFWBOX
MAC017-025-062115-
/0..000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
211 PM EDT WED JUL 6 2005

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL MIDDLESEX COUNTY IN EASTERN MASSACHUSETTS
  THIS INCLUDES THE CITIES OF...SOMERVILLE...CAMBRIDGE
  NORTHERN SUFFOLK COUNTY IN EASTERN MASSACHUSETTS
  THIS INCLUDES THE CITY OF BOSTON

* UNTIL 515 PM EDT

* AT 207 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING WITH AN AREA OF RAIN NEARLY STATIONARY.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WATERTOWN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER ATTEMPT TO CROSS
BRIDGES OR ROADS WHERE WATER COVERS THE ROADWAY. IT ONLY TAKES A FOOT
OR TWO OF WATER TO WASH MOST CARS AWAY.

FLASH FLOODING OF POOR DRAINAGE AREAS IS LIKELY DUE TO THE TORRENTIAL
RAINFALL. CULVERTS ALONG ROADSIDES MAY BE WASHED OUT. STANDING WATER
ON ROADWAYS AND ESPECIALLY UNDERPASSES MAY RISE TO SEVERAL FEET IN
DEPTH SUBMERGING MOST VEHICLES.

THE HEAVY RAINFALL AND SLOW MOVEMENT OF THIS RAINFALL AREA WILL
RESULT IN FLOODING OF ROAD INTERSECTIONS AND LOW LYING 
AREAS...INCLUDING UNDERPASSES AND TUNNELS. KNOW ALTERNATE ROUTES
FOR TRAVEL IN CASE ROADS BECOME IMPASSABLE.

LAT...LON 4235 7123 4242 7110 4228 7086 4229 7108

$$

STRAUSS

1 follow-up statement

000 
WGUS71 KBOX 061913
FFSBOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
315 PM EDT WED JUL 6 2005

MAC017-025-062115-
SUFFOLK MA-MIDDLESEX MA-
315 PM EDT WED JUL 6 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 515 PM EDT FOR EAST CENTRAL
MIDDLESEX AND NORTHERN SUFFOLK COUNTIES...

THE WARNING INCLUDES THE CITIES OF BOSTON...SOMERVILLE AND 
CAMBRIDGE. 

AT 304 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE 
AXIS OF HEAVIEST RAINFALL HAS SHIFTED SOUTH OF THE WARNING AREA AS A 
COLD FRONT DRIFTS SOUTHWARD ACROSS EASTERN MASSACHUSETTS.
  
LIGHT TO MODERATE RAIN WILL CONTINUE IN THE WARNING AREA THROUGH 5 
PM.  ADDITIONAL RAINFALL OF ONE QUARTER INCH TO LOCALLY UP TO ONE 
HALF INCH IS POSSIBLE.  

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

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

$$

KJC

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.