Weather Blog: September 24, 2025 6 PM (Tropics)

TROPICAL WEATHER ACTIVITY MAY APPROACH THE WATERS OFF THE U.S. EAST COAST NEXT WEEK Tropical Storm Humberto A couple of tropical systems are being watched in the southwest Atlantic.  One or both may track uncomfortably close to the U.S. east coast next week.  One of these systems was named Tropical Storm Humberto this afternoon.  The… Read More »

Summer 2025 Summary – Warmer and Drier Than Average

Blue Hill Observatory Summer (Jun-Aug) 2025 Summary:  Summer 2025 temperature was much above average, and there was less precipitation and more sunshine than expected. The approximated 24-hour mean temperature for summer of 70.2 deg F was 2.7 degrees warmer than the 1891-2020 130-year average for the season, and it was 1.0 degrees warmer than the… Read More »

August 2025 Summary – Sunniest on Record

  Blue Hill Observatory August 2025 Summary:  August 2025 was cooler and drier than average with much above average sunshine. The approximated 24-hour mean temperature for the month of 68.5 deg F was 0.2 degrees warmer than the 1891-2020 130-year average for August, and it was 1.8 degrees cooler than the 1991-2020 30-year average. The… Read More »

Weather Blog: August 21, 2025 9 AM (Tropics)

HURRICANE ERIN WILL PASS WELL OFFSHORE OF SOUTHERN NEW ENGLAND BUT STILL BRING HIGH SURF, DANGEROUS RIP CURRENTS, EROSION, AND TROPICAL STORM FORCE GUSTS TO SOUTHERN NEW ENGLAND SHORELINES Erin Update as of Thursday Morning August 21 Hurricane Erin is off the North Carolina coastline this morning and has just begun to come under the… Read More »

Weather Blog: August 18, 2025 8 AM (Tropics)

POWERFUL HURRICANE ERIN WILL BRING HIGH SURF AND DANGEROUS RIP CURRENTS TO THE U.S. EAST COAST THIS WEEK Erin Update as of Monday Morning August 18 Major Hurricane Erin remains in an environment of weak wind shear and warm sea surface temperatures and has begun to increase in size.  As Erin gains latitude later this… Read More »

Blue Hill Observatory Begins Search for New Executive Director

Job Announcement: Released August 15, 2025 Role: Executive Director Location: Blue Hill Observatory, 1 Observatory Service Road, Milton, MA 02186 Employment Type: Full-Time  Deadline: Open Until Position is Filled Click Here to Read the Full Job Announcement and to Apply The Blue Hill Observatory, a National Historic Landmark and renown weather observation station, is seeking… Read More »

Weather Blog: August 16, 2025 12 PM (Tropics)

ERIN HAS STRENGTHENED INTO A MAJOR HURRICANE AND WILL BRING HIGH SURF AND DANGEROUS RIP CURRENTS TO THE U.S. EAST COAST Erin Update as of Saturday Morning August 16 Having moved into a more favorable environment with warm sea surface temperatures and relatively light vertical wind shear, Erin has rapidly strengthened into a major category… Read More »

Weather Blog: August 14, 2025 5 PM (Tropics)

ERIN FORECAST TO BECOME A MAJOR HURRICANE Erin Update Warmer sea surface temperatures and light to moderate vertical wind shear provide an environment conducive for Erin to strengthen.  Although some increase in vertical wind shear is forecast this weekend due to a strengthening dome of high pressure over the southern United States, various intensity models… Read More »

Weather Blog: August 12, 2025 2 PM (Tropics)

NOW IS A GOOD TIME TO REVIEW HURRICANE PREPAREDNESS Hurricane Preparedness Tropical Storm Erin far out in the eastern tropical Atlantic as of Tuesday August 12 is a reminder that we are approaching the peak period of the hurricane season.  For those vulnerable to hurricanes, now is a good time to check and update their… Read More »

July 2025 Summary – Tenth Warmest on Record

Blue Hill Observatory July 2025 Summary:  July 2025 was much warmer and wetter than average with above average sunshine. The approximated 24-hour mean temperature for the month of 73.9 deg F was 3.9 degrees warmer than the 1891-2020 130-year average for July, and it was 2.2 degrees warmer than the 1991-2020 30-year average. The month… Read More »