Thursday, March 19, 2009
Warming trend this weekend.. system threatens rain by Monday
Temperatures will be on the rise again this weekend as a complex storm system begins to take shape over the northern Rockies. This storm system will draw an increasingly warm and moist southerly flow into southern MB for Sunday into Monday with temperatures rising into the plus 5-10 range. The weather will become increasingly unsettled by Sunday night with an area of rain developing over western MB along an inverted trof slowly moving east towards the Red River valley by Monday morning. This trof may bring some significant rainfall to portions of southern MB, mainly west and north of the Red River valley with 15-25 mm possible. Current indications are rainfall amounts may be less over the Red River valley, with 5-15 mm Monday.. however embedded convection may give locally higher amounts. There should be a break in the precipitation Monday night into Tuesday morning before another wave of precipitation moves in Tuesday into Wednesday as the main storm system over the central plains moves up towards Minnesota. This will likely change precipitation over to snow over southern MB as colder air feeds into the system. There still remains considerable uncertainty in the timing and precipitation amounts with this complex and slowly evolving system.. so residents are advised to listen for updated forecasts and statements over the next few days on this developing situation. Whatever the case, melting temperatures and several days of unsettled weather will bring further flooding concerns throughout the Red River valley. Stay tuned..
Posted by rob at 8:35 PM