Iowa Weather Report October 21st 2013 – Iowa Weather Network Archives

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BLAST!: Cold weather is here to stay for a while. Along with the colder air, some disturbances will come down the northwesterly flow and may give us some rain/snow mix to the state later tonight into Tuesday. Some of the models have been hinting that the rain/snow mix late tonight into Tuesday could accumulate. The NAM and the GFS earlier on Sunday had swaths of snow of at least a few inches across the state. The NAM being a little more than the GFS. Still not totally buying that solution at this time, however. There could be some accumulation by Tuesday morning on some grassy areas or on vehicles left outdoors. There may also be some icy patches on bridges and overpasses as well. Any accumulations during the day are likely not to occur due to ground temperatures being sufficient enough to melt any snow or sleet on contact. Another disturbance Wednesday into Wednesday night may bring some more rain and or rain snow mix as well to the state. There will be less moisture with that system so any possible accumulations are bound to be light and not impact travel at this time. Highs today through Wednesday will be in the 40s to low 50s with lows in the 20s to lower 30s.

MORE NORTHWESTERLY FLOW: Temperatures will moderate a bit on Friday ahead of another disturbance coming down the northwesterly flow pike. This would looks to take aim at the Great Lakes with some rain and or snow there. Temperatures will drop a little heading into the weekend but nothing to the extent of the cold this week. Highs will likely be in the 50s to near 60 this coming weekend. Another push of cold air looks to come by Monday of next week.

THE TRANSITIONAL FUN OF OCTOVEMBER: Cold air looks to return next Monday the 28th with another storm system. Rain is possible on Monday into Tuesday with any snow likely staying to our west and northwest. Denver could get a dumping of snow if the model is correct along with Cheyenne and the panhandle of Nebraska. Several more disturbances with shots of colder air are possible. Then at the end of the run (around the 4th and 5th of November), an interesting feature, another push of cold air with a possible former Eastern Pacific Tropical system coming up from the southwest. This was also seen on the 18z run earlier on Sunday and the GFS continues to show it here. It’s still way out there in the land of voo-doo but it’s something to watch for in the first week of November.