Freezing Start, a Brief Warmup, then More Seasonably Cool Weather.March 26th, 2012 at 10:35 am by Don Paul under 4 Warn Weather
The survival of many prematurely blossoming plants’ and trees’ blossoms will be in jeopardy Monday night. Clear skies, dry air, and a cold airmass will combine to produce Hard Freeze conditions in the interior and lighter Freeze conditions closer to the lake. The evening may begin with a brisk breeze, but that wind will gradually diminish. Temperatures will recover somewhat on a Sunny Tuesday, and move well above average on Wednesday ahead of another cooldown for Thur-Fri. That cool airmass does not look as potent as the current ridge of Canadian high pressure, but some frost could reoccur those nights in the interior. Night time lows will be returning to the 30s. Tonight’s (Monday) lows will range from the teens in sheltered valleys to the mid 20s in the eastern suburbs to the upper 20s close to the lakeshores. The overall pattern in the Day 6 and beyond time range looks somewhat unstable, with ups and downs in the temperatures, rather than persistent warmth or chill. There is no sign of a return to the extraordinary warmth experienced last week. 3 consecutive 80 degree days in March, as many of you have figured out, is something we’re statistically unlikely to see again–even with global warming–for many years.
The installation of the Dual Polarization upgrade to the NWS Doppler radar is now underway, taking the radar out of action for this week. The exact power-up date is undetermined, but Judy Levan says these installations have been going very smoothly and somewhat faster than expected at other NWS offices as of late. Fortunately, major convection is unlikely this week, so this is going to turn out to be an opportune time for the work to be done. Hopefully, our luck will hold until the radar is back up and running.