Heavy Freezing Spray Warning Issued for Port Heiden to Nelson Lagoon Through Sunday

Alert Details

A Heavy Freezing Spray Warning has been issued by the National Weather Service (NWS) Anchorage AK. This alert is currently in effect and is classified under the NWS alert type code UPW.

Affected Areas

The warning specifically impacts the coastal waters from Port Heiden to Nelson Lagoon, extending from 15 to 60 nautical miles out. This includes the forecast zone PKZ757.

What You Should Do

Mariners and vessel operators are advised to avoid the warning area. Heavy freezing spray can lead to significant ice accumulation on vessels, which poses a severe risk to stability and safety at sea.

Expected Conditions

According to the NWS Anchorage forecast, the following conditions are expected:

• Winds: Northeast winds at 30 knots are expected to persist through Sunday.
• Seas: Wave heights are forecast to be 8 feet today, increasing to 9 feet tonight and through Sunday.
• Icing: Heavy freezing spray is expected to occur continuously through Sunday.

Timeline

The warning is effective as of 3:09 AM AKST on Saturday, February 28, 2026. The hazardous conditions and the formal warning are expected to continue until 5:00 PM AKST on Sunday, March 1, 2026. Conditions are forecast to begin improving Sunday night as winds decrease to 25 knots and seas subside to 7 feet.