Epi Week #37 - 2017 General Statements

Massachusetts has confirmed 276 WNV-positive mosquito pools so far this season, with WNV activity in every mainland county in the state. There are 155 towns and cities in 11 counties at MODERATE risk for WNV, more than 40% of the state. Unseasonably warm temperatures will continue to contribute to mosquito activity, prolonging WNV risk statewide.

Weather

Epi Week 37 marked a return to drier conditions for most of the state, with the exception of western Essex County

At the time this report goes to press, a cold front has come through, finally bringing fall-like temperatures to Massachusetts. Rain is expected at the end of Epi Week 39, followed by a slow creep back up to summer-like daytime temperatures for the central portion of the state. However, nights are expected to remain in the 40s and 50s. Outlook