Alert archive / Massachusetts / Winter Storm Warnings in 2018

Winter Storm Warning 5, NWS Boston/Norton, MA

March 1, 20185 counties in Massachusetts

NWS Boston/Norton, MA issued this winter storm warning at Mar 1, 2018, 3:27 PM EST for 5 counties in Massachusetts. It took effect at Mar 2, 2018, 4:00 AM EST. It was in force for 17 hr. 10 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Mar 1, 2018, 3:27 PM EST (20:27 UTC)
In effect from
Mar 2, 2018, 4:00 AM EST
Expired
Mar 2, 2018, 8:39 PM EST
In force
17 hr
Issued by
NWS Boston/Norton, MA

Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 102 km from the middle of the area, began a volume at 20:32 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
Mar 2, 5:45 AM ESTSNOW 4Heath, MA
Mar 2, 6:40 AM ESTSNOW 4.4Heath, MA
Mar 2, 7:13 AM ESTSNOW 5.3Plainfield, MA
Mar 2, 7:43 AM ESTSNOW 2.61 Se Worthington, MA
Mar 2, 8:02 AM ESTSNOW 6.73 Se Hawley, MA
Mar 2, 8:28 AM ESTSNOW 7.83 Ne Rowe, MA
Mar 2, 8:30 AM ESTSNOW 5Leyden, MA
Mar 2, 9:55 AM ESTSNOW 7Plainfield, MA
Mar 2, 11:04 AM ESTSNOW 6.1Heath, MA
Mar 2, 11:58 AM ESTSNOW 9.63 Ne Rowe, MA

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

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.5 hours before the alert went out and 135 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, Albany, NY at 12:00Z on 2018-03-01Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2018-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939587897117136156175Sfc1 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
1058 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

103 
WWUS41 KBOX 012027
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
327 PM EST Thu Mar 1 2018

MAZ002-008-009-020430-
/O.UPG.KBOX.WS.A.0005.180302T0900Z-180303T0900Z/
/O.NEW.KBOX.WS.W.0005.180302T0900Z-180303T0900Z/
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Including the cities of Charlemont, Chesterfield, and Blandford
327 PM EST Thu Mar 1 2018

...WINTER STORM WARNING IN EFFECT FROM 4 AM FRIDAY TO 4 AM EST
SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 
  inches, with localized amounts up to 12 inches, are expected.

* WHERE...East Slopes of the Berkshires in western Massachusetts.

* WHEN...From 4 AM Friday to 4 AM EST Saturday.

* ADDITIONAL DETAILS...Heavy wet snow may result in down tree
  limbs and scattered power outages. Plan on difficult travel
  conditions.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ004-026-020430-
/O.UPG.KBOX.WS.A.0005.180302T1700Z-180303T1500Z/
/O.NEW.KBOX.WS.W.0005.180302T1700Z-180303T0900Z/
Northern Worcester MA-Northern Middlesex MA-
Including the cities of Barre, Fitchburg, and Ayer
327 PM EST Thu Mar 1 2018

...WINTER STORM WARNING IN EFFECT FROM NOON FRIDAY TO 4 AM EST
SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 7 
  inches, with localized amounts up to 10 inches, are expected.

* WHERE...Northern Worcester and Northern Middlesex Counties in
  central Massachusetts.

* WHEN...From noon Friday to 4 AM EST Saturday.

* ADDITIONAL DETAILS...Heavy wet snow may result in down tree
  limbs and scattered power outages. Plan on difficult travel
  conditions.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ012-020430-
/O.CON.KBOX.WS.A.0005.180302T1700Z-180303T1500Z/
Southern Worcester MA-
Including the cities of Milford and Worcester
327 PM EST Thu Mar 1 2018

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH SATURDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 4 to 7 
  inches are possible.

* WHERE...Southern Worcester County in central Massachusetts.

* WHEN...From Friday afternoon through Saturday morning.

* ADDITIONAL DETAILS...Heavy wet snow may result in down tree
  limbs and scattered power outages. Plan on difficult travel
  conditions.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow that may impact travel. Continue to monitor the latest 
forecasts.

&&

$$
7 follow-up statements
551 
WWUS41 KBOX 020329
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
1029 PM EST Thu Mar 1 2018


MAZ002-008-009-021130-
/O.CON.KBOX.WS.W.0005.180302T0900Z-180303T0900Z/
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Including the cities of Charlemont, Chesterfield, and Blandford
1029 PM EST Thu Mar 1 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM FRIDAY TO
4 AM EST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 
  inches, with localized amounts up to 13 inches, are expected.

* WHERE...East Slopes of the Berkshires in western Massachusetts.

* WHEN...From 4 AM Friday to 4 AM EST Saturday.

* ADDITIONAL DETAILS...Heavy wet snow may result in down tree
  limbs and scattered power outages. Plan on difficult travel
  conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ004-026-021130-
/O.CON.KBOX.WS.W.0005.180302T1700Z-180303T0900Z/
Northern Worcester MA-Northern Middlesex MA-
Including the cities of Barre, Fitchburg, and Ayer
1029 PM EST Thu Mar 1 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON FRIDAY TO
4 AM EST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 3 to 5 
  inches, with localized amounts up to 10 inches, are expected.

* WHERE...Northern Worcester MA and Northern Middlesex MA 
  Counties.

* WHEN...From noon Friday to 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the evening commute on Friday. Tree branches 
  could fall. Be prepared for significant reductions in 
  visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ012-021130-
/O.CON.KBOX.WS.A.0005.180302T1700Z-180303T1500Z/
Southern Worcester MA-
Including the cities of Milford and Worcester
1029 PM EST Thu Mar 1 2018

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH SATURDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 4 to 7 
  inches are possible.

* WHERE...Southern Worcester MA County.

* WHEN...From Friday afternoon through Saturday morning.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the evening commute on Friday. Tree branches 
  could fall. Significant reductions in visibility are possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow, sleet or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.

&&

$$
738 
WWUS41 KBOX 020906
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
406 AM EST Fri Mar 2 2018

MAZ002-008-009-021715-
/O.CON.KBOX.WS.W.0005.000000T0000Z-180303T0900Z/
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Including the cities of Charlemont, Chesterfield, and Blandford
406 AM EST Fri Mar 2 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8
  inches, with localized amounts up to 11 inches possible.

* WHERE...Western Franklin MA, Western Hampshire MA and Western
  Hampden MA Counties. Including the towns of Charlemont,
  Chesterfield and Blandford.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Heavy wet snow may result in down tree
  limbs and scattered power outages. Plan on difficult travel
  conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ004-026-021715-
/O.CON.KBOX.WS.W.0005.180302T1700Z-180303T0900Z/
Northern Worcester MA-Northern Middlesex MA-
Including the cities of Barre, Fitchburg, and Ayer
406 AM EST Fri Mar 2 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON TODAY TO 4 AM
EST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 7
  inches.

* WHERE...Northern Worcester MA and Northern Middlesex MA
  Counties. Including the towns of Barre, Fitchburg, and Ayer

* WHEN...From noon today to 4 AM EST Saturday.

* ADDITIONAL DETAILS...Heavy wet snow may result in down tree
  limbs and scattered power outages. Plan on difficult travel
  conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ012-021715-
/O.UPG.KBOX.WS.A.0005.180302T1700Z-180303T1500Z/
/O.NEW.KBOX.WW.Y.0015.180302T1700Z-180303T0900Z/
Southern Worcester MA-
Including the cities of Milford and Worcester
406 AM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 4 AM EST
SATURDAY...

* WHAT...Snow expected. Total snow accumulations of 1 to 4 inches,
  with localized amounts up to 5 inches are possible.

* WHERE...Southern Worcester MA County, including the cities of 
  Milford and Worcester

* WHEN...From noon today to 4 AM EST Saturday.

* ADDITIONAL DETAILS...Heavy wet snow may result in down tree
  limbs and scattered power outages. Plan on difficult travel
  conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.

&&

$$

MAZ003-021715-
/O.NEW.KBOX.WW.Y.0015.180302T0906Z-180303T0900Z/
Eastern Franklin MA-
Including the cities of Greenfield and Orange
406 AM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM EST SATURDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of 1 to 4
  inches, with localized amounts up to 6 inches, are expected.

* WHERE...Eastern Franklin MA County including the towns of
  Greenfield and Orange.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Heavy wet snow may result in down tree
  limbs and scattered power outages. Plan on difficult travel
  conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while
driving.

&&

$$

Nocera
519 
WWUS41 KBOX 021458
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
958 AM EST Fri Mar 2 2018

MAZ002-008-009-022300-
/O.CON.KBOX.WS.W.0005.000000T0000Z-180303T0900Z/
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Including the cities of Charlemont, Chesterfield, and Blandford
958 AM EST Fri Mar 2 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Heavy snow. Total wet snow accumulations of 12 to 18 
  inches are expected.

* WHERE...Western Franklin, Western Hampshire and Western Hampden 
  Counties.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be
  prepared for significant reductions in visibility at times.
  Heavy wet snow may result in downed tree limbs and scattered 
  power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ004-026-022300-
/O.CON.KBOX.WS.W.0005.180302T1700Z-180303T0900Z/
Northern Worcester MA-Northern Middlesex MA-
Including the cities of Barre, Fitchburg, and Ayer
958 AM EST Fri Mar 2 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Heavy snow expected. Total wet snow accumulations of 4 
  to 7 inches, mainly across the higher terrain, are expected.

* WHERE...Northern Worcester and Northern Middlesex Counties.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Tree
  branches could fall. Be prepared for significant reductions in
  visibility at times. Heavy wet snow may result in downed tree
  limbs and scattered power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ012-022300-
/O.CON.KBOX.WW.Y.0015.180302T1700Z-180303T0900Z/
Southern Worcester MA-
Including the cities of Milford and Worcester
958 AM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Snow expected. Total wet snow accumulations of 1 to 3 
  inches, with localized amounts up to 5 inches, are expected.

* WHERE...Southern Worcester County.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the evening commute. Damage to trees and power lines is
  likely. Be prepared for reduced visibilities at times. Heavy wet
  snow may result in downed tree limbs and scattered power
  outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.

&&

$$

MAZ003-022300-
/O.CON.KBOX.WW.Y.0015.000000T0000Z-180303T0900Z/
Eastern Franklin MA-
Including the cities of Greenfield and Orange
958 AM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Wet snow. Total wet snow accumulations of 1 to 3 inches,
  with localized amounts up to 6 inches, are expected.

* WHERE...Eastern Franklin MA County.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the evening commute. Tree branches could fall. Be
  prepared for reduced visibilities at times. Heavy wet snow may
  result in downed tree limbs and scattered power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while
driving.

&&

$$
793 
WWUS41 KBOX 021802
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
102 PM EST Fri Mar 2 2018

MAZ002-008-009-030215-
/O.CON.KBOX.WS.W.0005.000000T0000Z-180303T0900Z/
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Including the cities of Charlemont, Chesterfield, and Blandford
102 PM EST Fri Mar 2 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Heavy snow. Total wet snow accumulations of 12 to 18 
  inches are expected.

* WHERE...Western Franklin MA, Western Hampshire MA and Western 
  Hampden MA Counties.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be
  prepared for significant reductions in visibility at times.
  Heavy wet snow may result in downed tree limbs and scattered 
  power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ004-026-030215-
/O.CON.KBOX.WS.W.0005.000000T0000Z-180303T0900Z/
Northern Worcester MA-Northern Middlesex MA-
Including the cities of Barre, Fitchburg, and Ayer
102 PM EST Fri Mar 2 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Heavy snow expected. Total wet snow accumulations of 4 
  to 7 inches, mainly across the higher terrain, are expected.

* WHERE...Northern Worcester MA and Northern Middlesex MA 
  Counties.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Tree
  branches could fall. Be prepared for significant reductions in
  visibility at times. Heavy wet snow may result in downed tree
  limbs and scattered power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

CTZ004-MAZ013-017-020-RIZ001>007-030215-
/O.EXB.KBOX.WW.Y.0015.180302T2200Z-180303T0600Z/
Windham CT-Western Norfolk MA-Northern Bristol MA-
Southern Bristol MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Bristol RI-Washington RI-Newport RI-
Including the cities of Putnam, Willimantic, Foxborough, Norwood,
Taunton, Fall River, New Bedford, Foster, Smithfield, Providence,
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, and Newport
102 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
1 AM EST SATURDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of 1 to 4
  inches are expected, with locally up to 5 possible over higher 
  terrain in northwest Rhode Island. 

* WHERE...Portions of northeast Connecticut, eastern and
  southeastern Massachusetts and Rhode Island.

* WHEN...From 5 PM this afternoon to 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the latter part of the evening commute. Be prepared for
  reduced visibilities at times. Heavy wet snow may result in some
  downed tree limbs and scattered power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while
driving.

&&

$$

MAZ012-030215-
/O.CON.KBOX.WW.Y.0015.000000T0000Z-180303T0900Z/
Southern Worcester MA-
Including the cities of Milford and Worcester
102 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Snow expected. Total wet snow accumulations of 1 to 4 
  inches, with localized amounts up to 5 inches, are expected.

* WHERE...Southern Worcester County.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the evening commute. Be prepared for reduced visibilities
  at times. Heavy wet snow may result in some downed tree limbs 
  and scattered power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.

&&

$$

MAZ003-030215-
/O.CON.KBOX.WW.Y.0015.000000T0000Z-180303T0900Z/
Eastern Franklin MA-
Including the cities of Greenfield and Orange
102 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM EST
SATURDAY...

* WHAT...Wet snow. Total wet snow accumulations of 1 to 4 inches,
  with localized amounts up to 6 inches, are expected.

* WHERE...Eastern Franklin MA County.

* WHEN...Until 4 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the evening commute. Be prepared for reduced visibilities
  at times. Heavy wet snow may result in some downed tree limbs 
  and scattered power outages. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while
driving.

&&

$$
541 
WWUS41 KBOX 022018
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
318 PM EST Fri Mar 2 2018

MAZ004-026-030430-
/O.CAN.KBOX.WS.W.0005.000000T0000Z-180303T0900Z/
/O.EXB.KBOX.WW.Y.0015.180302T2018Z-180303T0600Z/
Northern Worcester MA-Northern Middlesex MA-
Including the cities of Barre, Fitchburg, and Ayer
318 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 AM EST SATURDAY...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Snow expected. Total wet snow accumulations of 2 to 4
  inches are expected, with locally up to 5 inches possible. 

* WHERE...Northern Worcester MA and Northern Middlesex MA 
  Counties.

* WHEN...Until 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the evening commute. Be prepared for reduced 
  visibilities at times. Heavy wet snow may result in some downed 
  tree limbs and scattered power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.

&&

$$

MAZ002-008-009-030430-
/O.EXT.KBOX.WS.W.0005.000000T0000Z-180303T0600Z/
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Including the cities of Charlemont, Chesterfield, and Blandford
318 PM EST Fri Mar 2 2018

...WINTER STORM WARNING NOW IN EFFECT UNTIL 1 AM EST SATURDAY...

* WHAT...Heavy snow. Total wet snow accumulations of 12 to 18 
  inches are expected.

* WHERE...Western Franklin MA, Western Hampshire MA and Western 
  Hampden MA Counties.

* WHEN...Until 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times. 
  Heavy wet snow may result in downed tree limbs and scattered 
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ012-030430-
/O.EXT.KBOX.WW.Y.0015.000000T0000Z-180303T0600Z/
Southern Worcester MA-
Including the cities of Milford and Worcester
318 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 1 AM EST
SATURDAY...

* WHAT...Snow expected. Total wet snow accumulations of 2 to 4
  inches are expected.

* WHERE...Southern Worcester County.

* WHEN...Until 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Be prepared for reduced 
  visibilities at times. Heavy wet snow may result in some 
  downed tree limbs and scattered power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.

&&

$$

MAZ003-030430-
/O.EXT.KBOX.WW.Y.0015.000000T0000Z-180303T0600Z/
Eastern Franklin MA-
Including the cities of Greenfield and Orange
318 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 1 AM EST
SATURDAY...

* WHAT...Wet snow. Total wet snow accumulations of 1 to 4 inches,
   with localized amounts up to 6 inches, are expected.

* WHERE...Eastern Franklin MA County.

* WHEN...Until 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Be prepared for reduced 
  visibilities at times. Heavy wet snow may result in some 
  downed tree limbs and scattered power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while
driving.

&&

$$

CTZ004-MAZ013-017-020-RIZ001>007-030430-
/O.CON.KBOX.WW.Y.0015.180302T2200Z-180303T0600Z/
Windham CT-Western Norfolk MA-Northern Bristol MA-
Southern Bristol MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Bristol RI-Washington RI-Newport RI-
Including the cities of Putnam, Willimantic, Foxborough, Norwood,
Taunton, Fall River, New Bedford, Foster, Smithfield, Providence,
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, and Newport
318 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST
SATURDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of 1 to 4
  inches are expected, with locally up to 5 inches possible over 
  higher terrain in northwest Rhode Island.

* WHERE...Portions of northeast Connecticut, eastern and 
  southeastern Massachusetts and Rhode Island.

* WHEN...From 5 PM this afternoon to 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the latter part of the evening commute. Be 
  prepared for reduced visibilities at times. Heavy wet snow may 
  result in some downed tree limbs and scattered power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while
driving.

&&

$$
439 
WWUS41 KBOX 022327
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
627 PM EST Fri Mar 2 2018

MAZ003-004-026-030030-
/O.CAN.KBOX.WW.Y.0015.000000T0000Z-180303T0600Z/
Eastern Franklin MA-Northern Worcester MA-Northern Middlesex MA-
Including the cities of Greenfield, Orange, Barre, Fitchburg, 
and Ayer
627 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Rain may change to a period of snow over the higher elevations 
before ending. Only minor accumulations of a coating to a few
inches are expected. 

$$

MAZ002-008-009-030600-
/O.CON.KBOX.WS.W.0005.000000T0000Z-180303T0600Z/
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Including the cities of Charlemont, Chesterfield, and Blandford
627 PM EST Fri Mar 2 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST
SATURDAY...

* WHAT...Heavy snow. Total wet snow accumulations of 12 to 18 
  inches are expected.

* WHERE...Western Franklin MA, Western Hampshire MA and Western 
  Hampden MA Counties.

* WHEN...Until 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times. 
  Heavy wet snow may result in downed tree limbs and scattered 
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

MAZ012-030600-
/O.CON.KBOX.WW.Y.0015.000000T0000Z-180303T0600Z/
Southern Worcester MA-
Including the cities of Milford and Worcester
627 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST
SATURDAY...

* WHAT...Wet Snow expected. Total wet snow accumulations of 1 to 
  4 inches are expected.

* WHERE...Southern Worcester County.

* WHEN...Until 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Be prepared for reduced 
  visibilities at times. Heavy wet snow may result in some 
  downed tree limbs and scattered power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.

&&

$$

CTZ004-MAZ013-017-020-RIZ001>007-030600-
/O.CON.KBOX.WW.Y.0015.000000T0000Z-180303T0600Z/
Windham CT-Western Norfolk MA-Northern Bristol MA-
Southern Bristol MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Bristol RI-Washington RI-Newport RI-
Including the cities of Putnam, Willimantic, Foxborough, Norwood,
Taunton, Fall River, New Bedford, Foster, Smithfield, Providence,
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, and Newport
627 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST
SATURDAY...

* WHAT...Wet snow expected. Total wet snow accumulations of 1 to 4
  inches are expected.

* WHERE...Portions of northeast Connecticut, eastern and 
  southeastern Massachusetts and Rhode Island.

* WHEN...From 5 PM this afternoon to 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the latter part of the evening commute. Be 
  prepared for reduced visibilities at times. Heavy wet snow may 
  result in some downed tree limbs and scattered power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while
driving.

&&

$$
505 
WWUS41 KBOX 030139
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Taunton MA
839 PM EST Fri Mar 2 2018


MAZ002-008-009-030245-
/O.CAN.KBOX.WS.W.0005.000000T0000Z-180303T0600Z/
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Including the cities of Charlemont, Chesterfield, and Blandford
839 PM EST Fri Mar 2 2018

...WINTER STORM WARNING IS CANCELLED...

Snow has come to an end across the east slope of Berkshires this
evening. Dry air from the west continues to filter into the area
which will limit the ongoing band from reaching the far west.
Still cannot rule out a few flakes but the bulk of any
accumulating snowfall has come to an end. 

$$

MAZ012-030600-
/O.CON.KBOX.WW.Y.0015.000000T0000Z-180303T0600Z/
Southern Worcester MA-
Including the cities of Milford and Worcester
839 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST
SATURDAY...

* WHAT...Snow. Additional snow accumulations of up to two inches 
  are expected.

* WHERE...Southern Worcester MA County.

* WHEN...Until 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times. 
  Heavy wet snow may result in downed tree limbs and scattered 
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.

&&

$$

CTZ004-MAZ013-017-020-RIZ001>007-030600-
/O.CON.KBOX.WW.Y.0015.000000T0000Z-180303T0600Z/
Windham CT-Western Norfolk MA-Northern Bristol MA-
Southern Bristol MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Bristol RI-Washington RI-Newport RI-
Including the cities of Putnam, Willimantic, Foxborough, Norwood,
Taunton, Fall River, New Bedford, Foster, Smithfield, Providence,
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, and Newport
839 PM EST Fri Mar 2 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST
SATURDAY...

* WHAT...Wet snow. Additional wet snow accumulations of 1 to 3 
  inches are expected.

* WHERE...Portions of northern Connecticut, eastern and 
  southeastern Massachusetts and northern and southern Rhode 
  Island.

* WHEN...Until 1 AM EST Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times. 
  Heavy wet snow may result in downed tree limbs and scattered 
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for wet snow means periods of wet snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while
driving.

&&

$$

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this winter storm warning went out at Mar 1, 3:10 PM EST, 17 minutes earlier.

Area forecast discussion, Mar 1, 3:10 PM EST, 17 minutes before
Area Forecast Discussion
National Weather Service Taunton MA
310 PM EST Thu Mar 1 2018

.SYNOPSIS...
Expect light winds and dry conditions through the remainder of
the day with temperatures topping off from 55 to 60. Rain
overspreads the region tonight with mixed snow and sleet in
western Massachusetts as a powerful coastal storm begins to form
south of Nantucket. This storm will impact the region with
major coastal flooding, damaging winds, possibly heavy wet snow
to the high terrain and fresh water flooding possible across
Rhode Island and eastern Massachusetts. Drier weather returns
this weekend, but with gusty northeast winds lasting through
Monday. Another weather system races east from the Pacific Coast
and brings rain or snow to our area midweek.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
1005 AM Update...

Leading edge of the high clouds continue to shift E from PA/S
NY as seen on latest GOES-East visible satellite imagery as weak
cold front pushes SE across the region. Winds as starting to
increase, mainly from the NW across most of the region, but
ahead of the front winds remain light N-NE. Temps are recovering
nicely even with the thin veil of clouds working across the
region. Readings at 15Z range from 41 degrees at KORE to 54
degrees at both KEWB and KFMH.

Near term forecast pretty much on track, with increasing mid and
high clouds through the remainder of the day. It should remain
dry into the afternoon, as leading edge of the precipitation
across central PA and central MD at 15Z. Some light rain may
reach into the lower CT valley by around sunset.

Near term forecast pretty much on track. Have updated to bring
conditions current.

Previous Discussion...

Sunshine will fade behind mid and high clouds this afternoon.
Any precip should hold off until after sunset across CT and
later this evening or after midnight elsewhere.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY/...
5 AM update...

*** Damaging Hurricane Force Wind Gusts Cape Cod & Islands ***
*** Major/Severe Coastal Flooding Possible Friday & Saturday ***
*** Heavy Wet Snow and Power Outages Possible High Terrain ***
*** Fresh Water Flooding Possible Rhode Island & eastern MA ***

Synoptic Overview and Model Preferences...

Still expecting a high end multi facet coastal storm to impact the
region late tonight thru Fri night, as cyclogenesis takes place near
the 40N/70W benchmark with 975 low forming and then becoming
occluded as mid level low captures surface circulation. 00z NAM
trended farther north with its dry slot coming onshore to the south
coast. This shifts its axis of heaviest qpf and core of highest winds
farther north than remainder of guidance. 00Z GFS/RGEM/ECMWF and
UKMET have shifted farther south with axis of heaviest qpf south of
the MASS pike and strongest winds over Cape Cod and Islands. Given
event still in the 36-48 hr window combined with large model spread
will follow a blend approach of all 00z guidance.

Damaging Wind Threat...

Very impressive low level jet develops around 00z Sat with all model
guidance showing 85-95 kt northeast jet over Cape Cod and Islands.
00z RGEM was the strongest at 100 kt! 00z NAM on the northern edge
of the envelope of solutions with jet core near Boston to the north
shore. Model consensus places highest risk over Cape Cod and the
Islands where hurricane force wind gusts (64kt-75mph) are likely.
Thus have upgraded the High Wind Watch to a High Wind Warning.
Expecting damaging wind gusts across Cape Cod and the Islands this
afternoon and evening. This will likely result in at least isolated
power outages. Elsewhere, kept the High Wind Watch going given the
uncertainty on the northern extent of the stronger wind field.

Heavy Wet Snow Threat...

Very tricky forecast given model spread on axis of heaviest qpf
which will impact location of dynamical and diabatic cooling. Heavy
snow threat not necessarily tied to high terrain as area of heaviest
qpf will flip rain to snow as vigorous upward vertical motion will
cool column along with diabatic cooling from melting snow. However
colder temps in the high terrain will aid in snow accumulating.
Given these parameters have hoisted a Winter Storm Watch for the
east slopes of the Berks and Worcester Hills to convey this snow
potential. Now while our snow totals are less than Winter Storm
Criteria (6+ inches), it only takes 3 to 4 inches of heavy wet snow
to bring down tree limbs resulting in isolated power outages. Thus
our Winter Storm Watch is more based on impacts than snow criteria.
Wild card here will be across RI and eastern MA where very strong
vertical motion may be able to erode warm layer around 850 mb,
flipping rain to snow from approximately 21z Fri into Fri evening.
These may result in several inches of wet snow for RI and eastern
MA. However confidence was not high enough to issue a Winter Storm
Watch.

Heavy Rain Threat...

Still looking at the risk for 2-4" of rainfall with greatest threat
over RI and southeast MA per latest model trends. Given this
southward shift on most of the guidance except the NAM, combined
with more snow expected inland, decided to drop the Flood Watch for
western-central MA. Elsewhere Flood Watch continues with greatest
risk for flooding across RI and southeast MA. Heaviest rain occurs
Fri and Fri evening.

This weekend...Moderate confidence.

*** Damaging wind threat continues into Saturday ***
*** Moderate to major Coastal flooding will lingering into
 Saturday high tide ***

Precip: Anomalous storm system will begin to pull out to sea, but
stall over the weekend keeping the region in a more north/northeast
flow. As the system shifts eastward, wind gusts and and heavy
rainfall will begin to subside. However, appears that with the
onshore flow, an a few pieces of energy passing through the flow, on
and off showers will continue for the region on Saturday and perhaps
even into Sunday. Highest confidence is across the eastern MA
coastline. One thing to watch is lack of moisutre above 800 mb, so
precip could be more on the lines of drizzle then rainfall
especially by Saturday evening.

Wind: Still a good pressure gradient across the region and with
steep lapse rates, could still see strong wind gusts especially
across the Cape and Islands. While they will not be as strong as
Friday, still expecting 45-60 kts for the eastern MA coast and 40-50
kts across the I-95 corridor and over 25 kts for the interior. This
could continue the potential for damage to trees and powerlines and
limit restoration efforts. Pressure gradient will begin to slacken
Saturday night and into Sunday. Still could see 25-40 kts across the
I-95 corridor into Sunday leading to a breezy day.

Coastal Flooding: Significant coastal flooding for the Saturday high
tide appears to be likely. More details in the coastal flooding
section below.

If the cut-off low wobbles and retrogrades a bit westward, the
precip chances will be on the increase as well as damaging wind
gusts. Will leave a chc of showers through the period for this
potential. Plan on leaving strong damaging winds especially for Cape
and Islands, but this may need to be push westward if the low
retrogrades. In hindsight, because of the significance of the block
across Canada and Greenland, this low will not be moving eastward
anytime soon so lingering showers/precip and strong wind gusts
appears remain through this period.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
Big Picture...

Longwave pattern shows ridge east/trough west this weekend, then
flattens during the week. Shortwave pattern shows one storm
during the long-term period. This system enters the Pacific
Coast Saturday and then moves east across the nation and
reaching the East Coast midweek.

The model mass and thermal fields are similar Sunday and show a
similar setup of ridges and troughs during the week. However,
even on Monday there are significant differences in the
placement of those ridges and troughs. Thermal fields also show
differences by Monday. Thus confidence in the forecast is
moderate at best and potentially low for Wednesday.

Details...

Sunday through Tuesday...

Offshore storm continues to move out to sea while high pressure
builds south into Quebec. The pressure gradient between the two
systems will maintain a northeast flow across Southern New
England Sunday and Monday. This flow is strongest Sunday, and
diminishes Monday. Moisture profiles show dry air above 750 mb
and very moist air below 850 mb. This suggests mainly cloudy
skies, especially in Eastern Mass where the northeast flow is
off the water. There is a low chance of showers, primarily in
the onshore northeast flow over Cape Cod and Plymouth County.
Low confidence, and individual models show at most 0.01 inch at
any one time, so we will show slight chance pops in that area.
Otherwise dry weather.

Low level mixing profile reaches at least 925 mb and likely
900 mb, with temperatures at that level supporting max sfc
temps in the low 40s each day. Dew points in the 20s to around 30
should support min sfc temps roughly 25-35.

Sunday winds in the mixed layer will be near 25 knots in Western
areas and near 40 knots Cape Cod and Islands, so we have
adjusted gusts to these levels. Monday winds in the similar
mixed layer are a little less.

Weak high pressure ridge builds over the region Tuesday and
maintains the dry weather and similar temperatures.

Wednesday-Thursday...

As noted above, there is a consensus that a Pacific shortwave
will cross the country, redeveloping off the East Coast either
Tuesday night or Wednesday. The coastal storm then sweeps east
and northeast, passing offshore of Southern New England.
Models agree on the event, but disagree on the timing of the
storm passage as well as the distance offshore that it passes.
Model QPF fields show the highest values along our south coast
or offshore. Temperature profiles show mostly snow, but sfc temps
show potential for rain or a rain/snow mix.

We will indicate chance pops starting Wednesday and diminishing w
est to east Thursday. Highest values will be along the South
Coast. The forecast will show potential for both rain and snow
at this time.

&&

.AVIATION /20Z THURSDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

Short Term /through Saturday/...

1010 AM update...

Through this afternoon...VFR. Dry conditions. Light winds into
early afternoon, becoming N-NE.

Tonight...VFR to start but quickly lowering to MVFR and then
IFR after 06z esp eastern MA and RI. Rain moves in from SW to
NE with a mix of snow, sleet and possibly freezing rain across
western-central MA late and toward 12z Fri.

Friday...Mainly IFR. Strong winds with gusts to 55-60 kt
Worcester Hills and east, including S RI. RA, mixing with SN
across inland areas after 18Z.

Friday Night...Mixed IFR/MVFR. Strong winds with gusts to 55 kt
Rhode Island and eastern Massachusetts. RA along the coast with
mixed RA/SN inland, then changing to SN during the night.

KBOS Terminal...High confidence in TAFs.

KBDL Terminal...High confidence in TAFs.

Outlook /Saturday Night through Tuesday/...

Saturday Night: Mainly VFR, with local IFR possible. Strong
winds with gusts to 40 kt.

Sunday: Mainly VFR. Strong winds with gusts to 45 kt, strongest
over Cape Cod and Islands.

Sunday Night: VFR. Strong winds with local gusts to 40 kt,
mainly on Cape Cod and Islands.

Monday through Monday Night: Mainly VFR. Windy with gusts to 35
kt.

Tuesday: Mainly VFR. Breezy.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

Short Term /through Saturday/...

Confidence...High

Extremely dangerous marine conditions expected Friday through
Saturday with much of the period characterized by storm force winds
and seas across ocean exposed waters over 20 feet. There is a period
Friday afternoon and Friday night when we anticipate hurricane force
wind gusts and seas 25 to 35 feet across the ocean exposed eastern
coastal waters. Seas may actually approach 40 feet Friday evening
just east of Cape Cod.

Outlook /Saturday Night through Tuesday/...

Confidence...High

Northeast winds and seas will gradually subside Sunday through
Tuesday. Gales will continue through the weekend. We will
probably still have seas high enough to warrant Small Craft
Advisories even into Tuesday.

&&

.HYDROLOGY...
While coastal flooding is one of the main threats with this
system, we will also have to keep a close eye on the river
flooding aspect. Many streams are flowing above to well above
normal for this time of year, due to mild weather which melted
any snow pack and a steady feed of rain events during the month
of February.

A Flood Watch continues for north central to northeast CT, all
of RI, and eastern MA from Friday morning into Saturday morning.

This upcoming storm is expected to bring 1.5 to 4 inches of QPF,
with the highest amounts across RI and eastern MA. The rain is
expeccted to mix with or change over to snow, so some QPF will
be frozen. The rain that does fall will likely result in areas
of minor stream and river flooding with in the Flood Watch area,
with pockets of moderate flooding possible. A River Flood
Warning has already been issued for the Pawtuxet River at
Cranston with moderate flooding forecast. Significant urban and
poor drainage flooding is also possible within the Flood Watch
area. Minor urban and poor drainage flooding is still possible
across interior MA, although a potential changeover to snow
should limit the extent of flooding.

In addition...due to the extent of storm surge expected with the
midday Friday, Friday night and Saturday high tides, saltwater
will likely elevate river levels along tidally affected rivers
and streams, and could result in flooding away from the
immediate shoreline. This could occur along some east coastal MA
as well as south coastal MA/RI rivers.

&&

.TIDES/COASTAL FLOODING...

Coastal Flood Warning is now in effect for east coastal
Massachusetts.

Confidence is fairly high for three high tide cycles of moderate to
major coastal flooding and a 4th high tide cycle of minor to
moderate coastal flooding Saturday night along the Massachusetts
east coast. Beach erosion for this event is expected to be extreme.
The main uncertainty is just how fast surge and seas ramp up during
Friday morning and just how high they remain for the Friday night
and Saturday midday high tide cycles.

Our best estimate at this time is that the surge will increase to
near 3 feet about the time of the Friday late morning high tide,
near 5 feet during the Friday late afternoon/early evening low tide,
near 4 feet for the Friday night high tide, and 3 to 3.5 feet for
the Saturday midday high tide. We anticipate waves to build to near
20 feet about the time of the late Friday morning high tide, peak 30
to 35 feet (except 35 to 40 feet east of Cape Cod) for Friday
evening, 25 to 30 feet during the Friday night high tide, and 20 to
25 feet (but with 13 to 14 second periods) for the Saturday midday
high tide.

Many have asked how this event will compare to January 4. Our
thinking is that water levels will most likely approach the January
4 levels for possibly all three high tide cycles from Friday through
Saturday. A worst case scenario would have one of the tides go a
little above the January 4 record level. For Boston, anticipate all
three high tide cycles will have water levels in the vicinity of
14.5 to 15.0 feet MLLW, but a worst case scenario could bring it as
high as 15.5 feet MLLW.

For ocean exposed coastal communities along eastern Massachusetts,
waves on top of elevated water levels will likely result in damage
to shoreline structures, conceivably during all three high tide
cycles. Many neighborhoods will likely become isolated, some for
extended period of time. The water will be extremely slow to
evacuate after the late Friday morning high tide, and pockets of
coastal flooding may persist all the way to the following Friday
night high tide.

Another big issue with this event will be severe to extreme beach
erosion over multiple high tide cycles. This could seriously
compromise protective dunes and sea walls in some spots and increase
vulnerability to some areas during the course of the event.

Along the Rhode Island exposed south coast, elevated water levels
and swells may produce areas of minor coastal flooding and
potentially moderate to rather severe beach erosion. A Coastal Flood
Advisory is in effect for that area.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Flood Watch from Friday morning through Saturday morning for
     CTZ002>004.
MA...High Wind Warning from 10 AM Friday to 10 AM EST Saturday for
     MAZ013-015>024.
     Flood Watch from Friday morning through Saturday morning for
     MAZ005>007-013>024.
     Coastal Flood Advisory from 7 AM Friday to 11 PM EST Saturday
     for MAZ020.
     Coastal Flood Warning from 9 AM Friday to 3 AM EST Sunday for
     MAZ007-015-016-019-022>024.
     High Wind Watch from Friday morning through Saturday afternoon
     for MAZ004>007-012-014-026.
     Winter Storm Watch from Friday afternoon through Saturday
     morning for MAZ004-012-026.
     Winter Storm Watch from late tonight through late Friday night
     for MAZ002-008-009.
RI...High Wind Warning from 10 AM Friday to 10 AM EST Saturday for
     RIZ002-004>008.
     Flood Watch from Friday morning through Saturday morning for
     RIZ001>008.
     Coastal Flood Advisory from 7 AM Friday to 11 PM EST Saturday
     for RIZ002-004>008.
     High Wind Watch from Friday morning through Saturday afternoon
     for RIZ001-003.
MARINE...Hurricane Force Wind Watch from Friday morning through late
     Friday night for ANZ232-254-255.
     Storm Watch from Friday morning through Saturday morning for
     ANZ230-231-233>237-250-251-256.

&&

SYNOPSIS...WTB/EVT
NEAR TERM...Dunten/EVT
SHORT TERM...Nocera
LONG TERM...WTB
AVIATION...WTB/Nocera/EVT
MARINE...WTB/Nocera/EVT/Thompson
HYDROLOGY...NMB
TIDES/COASTAL FLOODING...Thompson
Hazardous weather outlook, Mar 1, 4:24 AM EST, 11 hours 3 minutes before
Hazardous Weather Outlook
National Weather Service Taunton MA
424 AM EST Thu Mar 1 2018

MAZ004-012-026-020930-
Northern Worcester MA-Southern Worcester MA-Northern Middlesex MA-
424 AM EST Thu Mar 1 2018

...HIGH WIND WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
AFTERNOON...
...WINTER STORM WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SATURDAY MORNING...

This Hazardous Weather Outlook is for central Massachusetts and
eastern Massachusetts.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.
   Winter Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

MAZ005-006-014-RIZ001-003-020930-
Central Middlesex MA-Western Essex MA-Southeast Middlesex MA-
Northwest Providence RI-Western Kent RI-
424 AM EST Thu Mar 1 2018

...FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
MORNING...
...HIGH WIND WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
AFTERNOON...

This Hazardous Weather Outlook is for eastern Massachusetts,
northeastern Massachusetts and northern Rhode Island.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   High Wind Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

MAZ002-008-009-020930-
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
424 AM EST Thu Mar 1 2018

...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH LATE
FRIDAY NIGHT...

This Hazardous Weather Outlook is for western Massachusetts.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Storm Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

MAZ003-010-011-020930-
Eastern Franklin MA-Eastern Hampshire MA-Eastern Hampden MA-
424 AM EST Thu Mar 1 2018

This Hazardous Weather Outlook is for western Massachusetts.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

MAZ007-020930-
Eastern Essex MA-
424 AM EST Thu Mar 1 2018

...FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
MORNING...
...HIGH WIND WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
AFTERNOON...
...COASTAL FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH
SATURDAY AFTERNOON...

This Hazardous Weather Outlook is for northeastern Massachusetts.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   High Wind Watch.
   Coastal Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

CTZ002>004-020930-
Hartford CT-Tolland CT-Windham CT-
424 AM EST Thu Mar 1 2018

...FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
MORNING...

This Hazardous Weather Outlook is for northern Connecticut.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

MAZ013-017-018-020-021-RIZ002-004>008-020930-
Western Norfolk MA-Northern Bristol MA-Western Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Southeast Providence RI-
Eastern Kent RI-Bristol RI-Washington RI-Newport RI-Block Island RI-
424 AM EST Thu Mar 1 2018

...FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
MORNING...
...HIGH WIND WARNING IN EFFECT FROM 10 AM FRIDAY TO 10 AM EST
SATURDAY...

This Hazardous Weather Outlook is for eastern Massachusetts,
southeastern Massachusetts, northern Rhode Island and southern
Rhode Island.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   High Wind Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

MAZ015-016-019-022>024-020930-
Suffolk MA-Eastern Norfolk MA-Eastern Plymouth MA-Barnstable MA-
Dukes MA-Nantucket MA-
424 AM EST Thu Mar 1 2018

...FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
MORNING...
...COASTAL FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH
SATURDAY AFTERNOON...
...HIGH WIND WARNING IN EFFECT FROM 10 AM FRIDAY TO 10 AM EST
SATURDAY...

This Hazardous Weather Outlook is for eastern Massachusetts and
southeastern Massachusetts.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   Coastal Flood Watch.
   High Wind Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

ANZ234-020930-
Buzzards Bay-
424 AM EST Thu Mar 1 2018

...STORM WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
MORNING...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

ANZ230-231-233-235>237-250-251-256-020930-
Boston Harbor-Cape Cod Bay-Vineyard Sound-Rhode Island Sound-
Narragansett Bay-Block Island Sound-
Coastal waters east of Ipswich Bay and the Stellwagen Bank National
Marine Sanctuary-Massachusetts Bay and Ipswich Bay-
Coastal Waters from Montauk NY to Marthas Vineyard extending out to
20 nm South of Block Island-
424 AM EST Thu Mar 1 2018

...STORM WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
MORNING...

This Hazardous Weather Outlook is for Massachusetts coastal waters
and Rhode Island coastal waters.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

ANZ232-254-255-020930-
Nantucket Sound-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
Coastal Waters extending out to 25 nm South of Marthas Vineyard and
Nantucket-
424 AM EST Thu Mar 1 2018

...HURRICANE FORCE WIND WATCH IN EFFECT FROM FRIDAY MORNING THROUGH
LATE FRIDAY NIGHT...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Hurricane Force Wind Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 1, 3:27 AM ESTHigh Wind WarningBOXBarnstable, Bristol, Dukes, Essex, Middlesex, Nantucket and 4 more52 hr
Mar 1, 3:32 AM ESTWinter Storm WatchBOXFranklin, Hampden, Hampshire, Middlesex, Worcester25 hr
Mar 1, 3:50 AM ESTHurricane Force Wind WatchBOX12 hr
Mar 1, 11:37 AM ESTCoastal Flood WarningBOXBarnstable, Dukes, Essex, Nantucket, Norfolk, Plymouth and 1 more63 hr
Mar 1, 11:37 AM ESTCoastal Flood AdvisoryBOXBristol41 hr
Mar 1, 3:26 PM ESTHurricane Force Wind WarningBOX33 hr
Mar 1, 3:26 PM ESTStorm WarningBOX40 hr
Mar 1, 3:38 PM ESTWind AdvisoryBOXBarnstable, Bristol, Dukes, Essex, Franklin, Hampden and 7 more60 hr

Nearby

Winter Storm Warnings in Massachusetts, 2018Every winter storm warning in 2018

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.