Station Name: CAMBRIDGE RES., UNNAMED TRIB 2, NR LEXINGTON, MA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 207 feet

Nearest Address:
403 Lincoln St
Lexington, MA 02421
Middlesex County

GPS Coordinates: 42.43592855, -71.2600567

Nearby Water Temperatures

Heat Advisory issued May 18 at 12:57PM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Mon May 18, 2026, 12:57 PM
Expires: Tue May 19, 2026, 7:00 AM

* WHAT...Heat index values up to 96 expected. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...From 11 AM Tuesday to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night may cause heat illnesses. * ADDITIONAL DETAILS...This is the first multi-day period of hot temperatures. Those not yet accustomed to hot temperatures with a moderate degree of humidity should take appropriate heat-related precautions.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives, neighbors and pets. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Heat Advisory issued May 19 at 1:59AM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Tue May 19, 2026, 1:59 AM
Expires: Tue May 19, 2026, 5:00 PM

* WHAT...Heat index values up to 96 expected. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...From 11 AM this morning to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Air Quality Alert issued May 18 at 11:21PM EDT by NWS Boston/Norton MA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 11:21 PM
Expires: Tue May 19, 2026, 11:15 PM

The Massachusetts Department of Environmental Protection has issued an Air Quality Alert for Ground Level Ozone, from 11 AM to 11 PM EDT Tuesday. An Air Quality Alert day means that Ground Level Ozone concentrations within the region may approach or exceed levels that are Unhealthy for Sensitive Groups. Air is unhealthy for sensitive children and adults, such as those with asthma, lung or heart disease, and older adults. Sensitive children and adults should limit prolonged outdoor activity. For additional information, please visit the Massachusetts Department of Environmental Protection website at: https://mass.gov/dep/massair/forecast

Heat Advisory issued May 18 at 2:12PM EDT until May 19 at 8:00PM EDT by NWS Gray ME

Effective: Mon May 18, 2026, 2:12 PM
Expires: Tue May 19, 2026, 3:00 AM

* WHAT...Heat index values up to 95 expected. * WHERE...Western and Central Hillsborough, Eastern Hillsborough, and Interior Rockingham Counties. * WHEN...From 11 AM to 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...It will remain warm Tuesday night as overnight lows only dip into the lower 70s.

Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Air Quality Alert issued May 18 at 3:50PM EDT by NWS Gray ME

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 3:50 PM
Expires: Tue May 19, 2026, 10:00 PM

The New Hampshire Department of Environmental Services has issued an Air Quality Alert for ozone in from 10 AM to 10 PM EDT Tuesday. Ozone levels in Rockingham County are expected to rise into the Unhealthy for Sensitive Groups range. The New Hampshire Department of Environmental Services is predicting unhealthy air quality for sensitive individuals in the above- mentioned counties. Sensitive individuals include children and older adults; anyone with lung disease such as asthma, emphysema, and bronchitis; and people who are active outdoors. Even healthy individuals may experience mild health effects and should consider limiting strenuous or prolonged outdoor activities. For additional information, please visit the New Hampshire Department of Environmental Prediction website at, https://www4.des.state.nh.us/airdata/