Alert archive / Massachusetts / Rip Current Statements in 2026

Rip Current Statement 9, NWS Boston/Norton, MA

August 17, 20266 counties in Massachusetts

NWS Boston/Norton, MA issued this rip current statement at Aug 17, 2026, 1:50 PM EDT for 6 counties in Massachusetts. It took effect at Aug 18, 2026, 8:00 AM EDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Aug 17, 2026, 1:50 PM EDT (17:50 UTC)
In effect from
Aug 18, 2026, 8:00 AM EDT
Expired
Aug 18, 2026, 8:00 PM EDT
In force
12 hr
Issued by
NWS Boston/Norton, MA

Counties Barnstable County, MA, Essex County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA

The radar

The Boston radar (KBOX), 37 km from the middle of the area, began a volume at 17:54 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

Gray, ME (KGYX), launched 12:00Z, 5.8 hours before the alert went out and 211 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, Gray, ME at 12:00Z on 2026-08-17Temperature 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, Gray, ME at 12:00Z on 2026-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
643 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

836 
WHUS41 KBOX 171750
CFWBOX

Coastal Hazard Message
National Weather Service Boston/Norton MA
150 PM EDT Mon Aug 17 2026

MAZ024-180700-
/O.NEW.KBOX.RP.S.0009.260818T1200Z-260819T0000Z/
/O.CON.KBOX.RP.S.0008.000000T0000Z-260818T0000Z/
Nantucket MA-
150 PM EDT Mon Aug 17 2026

...HIGH RIP CURRENT RISK REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
...HIGH RIP CURRENT RISK IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...

* WHAT...For the first High Rip Current Risk, dangerous rip 
  currents. For the second High Rip Current Risk, dangerous rip 
  currents expected.

* WHERE...Nantucket MA County.

* WHEN...For the first High Rip Current Risk, until 8 PM EDT 
  this evening. For the second High Rip Current Risk, from 
  Tuesday morning through Tuesday evening.

* IMPACTS...Rip currents can sweep even the best swimmers away 
  from shore into deeper water.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Swim near a lifeguard. If caught in a rip current, relax and
float. Don't swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.

&&

$$

MAZ007-015-016-019-022-180700-
/O.NEW.KBOX.RP.S.0009.260818T1200Z-260819T0000Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-
150 PM EDT Mon Aug 17 2026

...HIGH RIP CURRENT RISK IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...

* WHAT...Dangerous rip currents expected.

* WHERE...Eastern Essex MA, Suffolk MA, Eastern Norfolk MA, 
  Eastern Plymouth MA and Barnstable MA Counties.

* WHEN...From Tuesday morning through Tuesday evening.

* IMPACTS...Rip currents can sweep even the best swimmers away 
  from shore into deeper water.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Swim near a lifeguard. If caught in a rip current, relax and
float. Don't swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.

&&

$$

MAZ023-RIZ006>008-180000-
/O.CON.KBOX.RP.S.0008.000000T0000Z-260818T0000Z/
Dukes MA-Washington RI-Newport RI-Block Island RI-
150 PM EDT Mon Aug 17 2026

...HIGH RIP CURRENT RISK REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

* WHAT...Dangerous rip currents.

* WHERE...Washington, Dukes MA, and Newport RI Counties.

* WHEN...Until 8 PM EDT this evening.

* IMPACTS...Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Swim near a lifeguard. If caught in a rip current, relax and
float. Don't swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.

&&

$$
2 follow-up statements
778 
WHUS41 KBOX 180610
CFWBOX

Coastal Hazard Message
National Weather Service Boston/Norton MA
210 AM EDT Tue Aug 18 2026

MAZ007-015-016-019-022-024-182100-
/O.CON.KBOX.RP.S.0009.260818T1200Z-260819T0000Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
210 AM EDT Tue Aug 18 2026

...HIGH RIP CURRENT RISK REMAINS IN EFFECT FROM 8 AM EDT THIS
MORNING THROUGH THIS EVENING...

* WHAT...Dangerous rip currents expected.

* WHERE...In Massachusetts, Eastern Essex, Suffolk, Eastern Norfolk, 
  Eastern Plymouth, Barnstable and Nantucket Counties.

* WHEN...From 8 AM EDT this morning through this evening.

* IMPACTS...Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Swim near a lifeguard. If caught in a rip current, relax and
float. Don't swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.

&&

$$
652 
WHUS41 KBOX 181726
CFWBOX

Coastal Hazard Message
National Weather Service Boston/Norton MA
126 PM EDT Tue Aug 18 2026

MAZ007-015-016-019-022-024-190000-
/O.CON.KBOX.RP.S.0009.000000T0000Z-260819T0000Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
126 PM EDT Tue Aug 18 2026

...HIGH RIP CURRENT RISK REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

* WHAT...Dangerous rip currents.

* WHERE...The entire east coast areas of Massachusetts as well as Cape Cod and Nantucket. 

* WHEN...Until 8 PM EDT this evening.

* IMPACTS...Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Swim near a lifeguard. If caught in a rip current, relax and
float. Don't swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 2:17 AM EDTRip Current StatementBOXDukes, Nantucket18 hr

Nearby

Rip Current Statements in Massachusetts, 2026Every rip current statement in 2026

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.