Lexington Weather

Lexington, Massachusetts, USA

20°F
12/15/2025 7:27pm 
  • Lexington Conditions: Clear
  • Temperature: 19.8°F / -6.8°CColder 0.3°F than last hour.
  • Dew Point: 8.4°FIncreased 0.3°Fsince last hour.
  • Relative Humidity: 61%Increased 2.0% since last hour.
  • Wind: Calm, 10-min avg: Calm, gust: 1 mph
  • Barometer: 30.05 in Steady
  • Visibility: 10 miles
  • Snow Today: 0.0 in
  •   

Watches, Warnings, and Advisories

Issued by the National Weather Service - Honolulu, HI

    HIGH SURF ADVISORY  

Oahu North Shore, HI

High Surf Advisory issued December 15 at 2:05PM HST until December 16 at 6:00AM HST by NWS Honolulu HI

HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST TUESDAY

Areas Affected: Niihau; Oahu North Shore; Kauai North

Urgency: Expected

Severity: Minor

Certainty: Likely

Alert Sent: Monday 2:05pm HST

Alert Effective: Monday 2:05pm HST

Alert Expires: Tuesday 3:15am HST (expect updated alert by this time)

Event Onset: Monday 2:05pm HST

Event Ends: Tuesday 6:00am HST

Issued by: NWS Honolulu HI

Details: 
...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM HST TUESDAY...

...HIGH SURF ADVISORY FOR WEST FACING SHORES OF NIIHAU KAUAI OAHU
AND MOLOKAI IS NO LONGER IN EFFECT...

...HIGH SURF ADVISORY NOW IN EFFECT FOR NORTH FACING SHORES OF
KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND THROUGH TONIGHT...

...HIGH SURF ADVISORY REMAINS IN EFFECT FOR WEST FACING SHORES OF
LEEWARD BIG ISLAND THROUGH TONIGHT...

.A large, medium period north-northwest (290-300 degree) swell has
peaked and will subside through tonight, except for west facing
shores of Leeward Big Island where this swell will continue
building through this evening. A large, long period north
(350-360 degree) swell is also building into area waters this
afternoon. This swell will maintain elevated surf along north
facing exposures through tonight.

* WHAT...Large breaking waves of 14 to 18 feet subsiding to 10 to
15 feet late tonight.

* WHERE...North facing shores of Niihau, Kauai, and Oahu.

* WHEN...Until 6 AM HST Tuesday.

* IMPACTS...Moderate. Strong breaking waves and strong currents
will make swimming dangerous.

Information: 
Heed all advice from ocean safety officials. When in doubt, don't
go out.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.9df7bbb99400b99aa5e4f3904afa5d3f85e7aae3.004.1
Codes: HIZ001, HIZ007, HIZ029
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9df7bbb99400b99aa5e4f3904afa5d3f85e7aae3.004.1

 

    FLOOD WATCH  

Oahu North Shore, HI

Flood Watch issued December 15 at 7:37AM HST until December 15 at 6:00PM HST by NWS Honolulu HI

Areas Affected: Niihau; Kauai Southwest; Kauai Mountains; Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Kauai North; Kauai East; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward

Urgency: Future

Severity: Severe

Certainty: Possible

Alert Sent: Monday 7:37am HST

Alert Effective: Monday 7:37am HST

Alert Expires: Monday 6:00pm HST

Event Onset: Monday 7:37am HST

Event Ends: Monday 6:00pm HST

Issued by: NWS Honolulu HI

Details: 
...FLOOD WATCH FOR KAUAI, NIIHAU, AND OAHU THROUGH THIS AFTERNOON...

* WHAT...Flash flooding caused by excessive rainfall continues to be
possible, but the threat decreases notably after 6 PM HST.
Therefore the watch is now ending then instead of 6 AM HST Tuesday.

* WHERE...Kauai, Oahu, and Niihau.

* WHEN...Until 6 PM HST this evening.

* IMPACTS...Flood prone roads and other low lying areas may be
closed due to elevated runoff and overflowing streams. Urban areas
may receive more significant flooding and property damage due to
rapid runoff.

* ADDITIONAL DETAILS...
- A trough stalled over the western Hawaiian Islands today will
continue to draw up more moisture rich southern latitude
moisture across the islands of Kauai, Niihau and Oahu.
Antecedent rain of between over 1 to 4 inches Sunday has
saturated the ground and caused more swollen streams. Thus,
it will not take as much rain to exacerbate minor flooding
concerns today. Showers may become locally heavy at times
with the slight chance for thunderstorm.

Information: 
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.1d3ff96dfbff71d4ea400886159d7d882cbd7c59.001.1
Codes: HIZ001, HIZ003, HIZ004, HIZ006, HIZ007, HIZ009, HIZ010, HIZ011, HIZ029, HIZ030, HIZ031, HIZ032, HIZ033, HIZ034, HIZ035, HIZ036
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.1d3ff96dfbff71d4ea400886159d7d882cbd7c59.001.1