Tuesday, April 28, 2009
Strong spring storm to bring rain to southern MB.. heavy snow to southwest SK
A strong spring storm organizing in Montana will track slowly eastward into North Dakota Wednesday and over southern MB Thursday. Rain from this system will spread across southern MB from the south and southwest during the day Wednesday reaching Winnipeg by late afternoon. Rain will continue Wednesday night over the Red River valley with 10-20 mm possible. Heavier amounts of 20-30 mm are possible over southwest MB and along the US border. Colder air on the backside of the storm system will bring heavy snow to Montana and parts of southern SK Wednesday, and it's possible that rain will change over to wet snow over portions of western MB Wednesday night into Thursday morning.
Posted by rob at 2:27 PM
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The computer models are starting to show a "warm-up"
Maybe next week we will hit our first 20C!!!
GFS is advertising a faster warmup than the Canadian GLB beginning Sunday. GFS suggests sunny skies and temperatures near 16C Sunday, considerably warmer than GLB's current 8C high.ReplyDelete
NWS Storm Total Precipitation Radar shows an area of 75 to +125mm of rain since 3pm yesterday. Minot to Northgate SK To Boisevain MB with a small CanUS (hwy 10 MB) Border area around Bottineau receiving over 125mm
Is this confirmed by any other source?
Link on my name
I'm not aware of any amounts that high in that area. MB ag-mesonet reported 25-28 mm of rain around Boissevain and Pierson, while NWS recorded 22 mm in Minot and 35 mm south of Oxbow SK. The storm total radar map appears to be overestimating amounts.
Picked up 10 mm overnight here in Charleswood.. 7 mm at the Winnipeg airport. Looks like a general 7-15 mm across the RRV, with 25-35 mm across far southwest MB over the Souris river basin.ReplyDelete
Bismarck office has a list of rainfall totals from yesterday's event.. highest amount was 1.80 inches (45 mm) near Mohall, halfway between Minot and the Canadian border. In general, looks like 20-40 mm near the international border.ReplyDelete
Devils Lake, Grand Forks and Cavalier Mn also picked up 15 to 20mmReplyDelete
Intersting Graphical History of Devils Lake peaks, coinciding with RR Floods . It is forecast to exceed its all time measurable High since the 1870s
Link on my name
On Hwy 10 South of Brandon at the US/Can Border there is a steep forested incline and high plateau, Driving thru the area I've encountered localized wicked winter snowfalls and summer Rains That is the same area that the Radar detected heavy rain of tuesday to today shows just just north of Mohal near the The International Peace GardenReplyDelete
Interestingly there is a winter snow advisory for the same area today.
If you look at the visible satellite imagery, you will see an area of snow just around Moose Mountain in southeast SK. That extra elevation was just enough to turn yesterday's rain to snow last night. Looks nice and white in the higher elevations south of Moose Jaw as well.ReplyDelete
ROB As a golfer I share the angst of Daniel P in the wait for warmer weather. Unfortunately NOAA doesn't share our optimism . See their MAY QPF prediction. Link on my nameReplyDelete
That warm up May be here on Monday (pun intended) see the GRAPHIC at http://www.crh.noaa.gov/wxstory.php?site=fgfReplyDelete
I'm also waiting for my first thunderstorms of the season!ReplyDelete
Looks like this week will bring it's first 20 C reading.
Hopefully that will mean some convective thunderstorms will come along with the warmer temperatures!
Do you see the potential for any thunderstorms on Monday???
It looks like the warmest air of the year!!
Upper support looks favourable for thunderstorm development by Monday evening, but as usual for this time of year, it depends on how much low level moisture is available for convective activity. NAM indicates ribbon of +10c dewpoints developing over Dakotas/srn MB ahead of frontal trough Monday, so the potential is there for isolated tstms to pop up given upper support and lift. It'll be a narrow window though..ReplyDelete