Still all playing out like '19, '20, and '21.
Try a mental exercise, close your eyes.
Think of cold, snow, a wintery landscape. Think of the cityscapes of Vancouver, Seattle, Portland, and Eugene, and picture them with just globs of snow heaped over them. Keep your eyes closed and imagine maps filled with those pepto pinks and purples. Imagine that arctic air spilling over Vancouver Island and making its way back to Washington and Oregon. Imagine regional blizzard warnings and snow cov
Yeah, the delta on Monday will be telling with Graphcast and Spire. People forget (or don't know) that both models only work off of initialization data and then use various degrees of image based machine learning at very high terrain definitions. Its effectively taking those analog lists to the next level. This means though that there is no real condition modeling taking place, but rather a "I think this feature will develop here because it typically does when these patterns at these levels are
The official H/L yesterday at Grand Rapids was 64/34 there was 0.01” of rainfall and the sun was out 52% of the time. The average wind speed was 13.1MPH and the highest wind was 33 MPH out of the SE. For today the average H/L is 63/42 the record high of 85 was set in 1990 and the record low of 27 was set in 1928. The most rainfall of 1.90” was in 1956 the record snowfall was 0.2” in 2004. Last year the H/L was 64/29. Here in MBY I had 0.09” of rain since 7AM yesterday and the overnight low of 53 was around midnight. At the current time it is cloudy and 58 here.
For the early afternoon SRH is limited but CAPE is huge. The CAPE is probably overstated given entrainment, but this does certainly support large hail
Later in the day the hodograph blows out as the LLJ kicks in. This looks more like a QLCS tornado threat as a presumably linear feature moves in.
We've got a moderate for severe from SPC and for rain from WPC:
Some ML guidance shows the highest threat more towards my area like nadocast:
But others like CSU is a bit further west:
I'm inclined to think the biggest severe weather threat will be further west towards OKC. I expect to see several strong tornadoes and reports of very large hail. As the storms congeal we will get a wind/QLCS threat morphing into a heavy rain/flood threat overnight. I don't think we will get anything truly crazy, but a couple of inches wouldn't shock me.
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