Weekly Outlook for SIWO

Date: Thursday, June 11, 2026

St. Lawrence Island

Pack ice remains along the northeast side of the island from Camp Iveetok through Camp Kulowiye. The area has not been seen by satellite in several days, and could be pushed away from shore by the southerly winds. All remaining ice is brash and small ice cakes. The pack ice flows around the east side of the island and disperses into very open pack ice. 

Shorefast ice is beginning to rapidly decay with a large lead forming between Mitletukeruk through Mugisitokiwik. However, compact to consolidated ice remains up to 15 to 20 miles away from the coast.  

The area is mostly open water to ice free. There is an area of very open to open pack ice approaching the islands from the south. The ice is brash to small ice cakes. 

The area is ice free. 

The area is mostly ice free except for very open pack ice near the coast between Tin City and York. 

Wind Forecast

St. Lawrence Island:

Winds on Friday (6/12) will be out of the southwest around 10-15kts/12-18mph. Overnight, winds will become more westerly with similar speeds. This will last throughout the day on Saturday (6/13). Winds will begin to turn more northwesterly Sunday (6/14) with speeds around 10-15kts/12-18mph. On Monday (6/15), northwest winds will shift back to west/southwest throughout the day, maintaining consistent speeds of 10-15kts/12-18mph. South/southwest winds will increase to  around 15-18kts/18-21 mph during the day, Tuesday (6/16). These winds will remain in place through Friday (6/19).

Wales to Shishmaref:

Southwest winds around 15-18kts/18-21 mph will gradually weaken throughout the day, Friday (6/12), and become more southerly by the evening. Winds will weaken through the night into Saturday (6/13), becoming light and variable around 5kts/7mph by the afternoon. Northerly winds will build in on Sunday (6/14), with speeds reaching 10-13kts/12-15mph by the afternoon. Monday (6/15), winds will remain out of the north/northwest around 10-13kts/12-15mph. Overnight Monday (6/15) into Tuesday (6/16), winds will shift southerly and increase throughout the day to around 10-15kts/12-18mph. Southerly winds will continue during the day on Wednesday (6/17), with a slight increase to 17-20kts/20-25mph. These conditions will continue through Friday (6/19).

Diomede:

Southwest winds around 15-18kts/18-21 mph will gradually weaken throughout the day, Friday (6/12) and become more southerly by the evening. Winds will continue to weaken overnight into Saturday (6/13) becoming light at around 5kts/7mph. On Sunday (6/14), northerly winds will build in with speeds reaching 10-13kts/12-15mph by the afternoon. Monday (6/15), winds will remain out of the north around 10-13kts/12-15mph into Tuesday (6/16) before shifting southerly and increasing to around 10-15kts/12-18mph. Southerly winds will continue throughout the day on Wednesday (6/17), increasing slightly to 17-20kts/20-25mph. These conditions will continue throughout Friday (6/19).

Port Clarence/Brevig Mission:

Friday morning (6/12), winds will be out of the southwest 19-23kts/22-26mph. Speeds will gradually weaken through the day to speeds of 4-8kts/5-10mph during the overnight hours. Saturday (6/13), winds will be more westerly with speeds around 5-8kts/7-10mph. Winds will continue to shift through Sunday (6/14), becoming northerly by the early morning. Wind speeds will start off light and increase to around 10-13kts/12-15mph by the afternoon. Northerly winds will lighten overnight into Monday (6/15), before increasing again to 10-13kts/12-15mph in the afternoon. North winds will lighten to around 4-8kts/5-10mph Monday night into Tuesday (6/16). During the afternoon on Tuesday (6/16) winds will shift to southwesterly and increase to 10-13kts/12-15mph throughout the day. A brief increase of southwest winds is expected during the afternoon on Wednesday (6/17), with speeds around 19-23kts/22-26mph. Southwest winds will weaken to around 10-13kts/12-15mph during the overnight hours into Thursday (6/18), before increasing again to 17-20kts/20-25mph by the afternoon. A similar trend can be expected Thursday night into Friday (6/19).

Temperature Forecast

St. Lawrence Island:

High temperatures will remain in the low to mid 40s through Wednesday of next week (6/17). There will be a cooling trend possible on Thursday (6/18) and Friday (6/19) with high temperatures dropping into the upper 30s to near 40 degrees. Low temperatures from Friday (6/12) through Wednesday (6/17) will be in the mid to upper 30s. The cooling temperatures which try to arrive Thursday (6/18) and Friday (6/19) may drop low temperatures slightly to the low to mid 30s. 

Wales to Shishmaref:

High temperatures will be steady in the low to mid 40s through next Wednesday (6/17). The same cooling trend is possible next Thursday (6/18) and Friday (6/19) with high temperatures in the mid to upper 30s possible. Low temperatures remain steady in the low to mid 30s throughout the period. 

Diomede:

High temperatures will be steady in the upper 30s to low 40s through next Wednesday (6/17). The same cooling trend is possible next Thursday (6/18) and Friday (6/19) with high temperatures in the mid to upper 30s possible. Low temperatures remain steady in the mid 30s through next Wednesday (6/17) with low 30s possible Thursday (6/18) and Friday (6/19). 

Port Clarence/Brevig Mission:

High temperatures in the low to mid 40s on Friday with a warming trend Saturday (6/13) and Sunday (6/14) with highs in the 50s. Temperatures gradually cool by a couple of degrees through Wednesday (6/17) with highs in the mid to upper 40s by then. Temperatures remain in the 40s through Friday (6/19). Low temperatures will consistently be in the mid 30s through Wednesday (6/17) with low 30s possible Thursday (6/18) and Friday (6/19).

St. Lawrence Island:

Expect ice to continue to move with local tides and currents through the week. Expect remaining pack ice to decay into areas of very open to open pack ice. 

Wales to Shishmaref:

Southerly winds on Friday may continue to dislodge shorefast ice along the coast. Close pack ice will remain through the week. A polynya may continue to open along the coast between Ikpek and Shishmaref.  

Nome:

Expect ice free conditions in the next week.

Port Clarence:

The area will become ice free this week. 

Diomede:

The area will become ice free this week.