4/30/2013 Frost Warning

Cold Temperatures on Wednesday Morning

Nic Loyd, Meteorologist, 509-786-9357
Gerrit Hoogenboom, Director, 509-786-9371

Time Period
High risk: Wednesday morning
Moderate risk: Thursday morning
Low risk: Friday morning and beyond

Locations Affected
Much of central and eastern Washington, and colder areas of western Washington away from water and cities.

Mid 20s in colder locations to the 30s elsewhere.

A cold and dry air mass will promote areas of frost on Wednesday morning, with generally colder temperatures compared to this morning. The frost coverage should be more widespread than Tuesday morning, especially in the Tri-Cities/Walla Walla area and the Basin. However, not all areas will experience sub-freezing low temperatures. It is important to note that some areas, especially slopes and hilltops, may be slightly warmer Wednesday morning relative to this morning. Mid 20s are expected in colder locations, with 30s elsewhere. The inversion will be stronger on Wednesday morning, with increasing effectiveness from wind machines.

Isolated frost is still likely on Thursday morning at the coldest sites, although safe conditions are expected for most areas. The coldest areas may fall into the upper 20s to low 30s, while most areas will be in the mid 30s to mid 40s. Milder temperatures will mean safe conditions in all areas beginning on Friday morning.

Please continue to monitor AgWeatherNet for weather forecast updates during this variable and critical time period. The Frost Risk page is updated daily, and additional frost risk detail will be available in the Friday outlook. For questions or further information, please contact Nic Loyd, (509)786-9367, nicholas.loyd@wsu.edu.

Washington State University