After a very chilly week across roughly the eastern two thirds of the country, this week will be warmer and eventually very wet. Last week saw the first major cold outbreak of the fall season. The result was widespread freeze and/or frost conditions that made there way down all the way into the deep south. The major grain growing areas of the country have seen an end to the growing season for this year. It was an interesting year as conditions started out cool very wet and eventually became warm and very dry, especially over the west half of the grain growing areas of the country.
A strong upper level system is diving south along the Pacific coast this Sunday afternoon. The system will carve out a large upper level trough over the Rockies by Wednesday and then move east over the Plains Thursday, accelerating east Friday. A strong south flow of increasing warmth and humidity will develop ahead of the system. The graphic from the NWS shows the expected average rainfall amounts through Friday evening. Areas from eastern Texas into northwest Missouri will experience the heaviest rainfall through the period. This is good news, as parts of those areas are experiencing drought conditions.
For the Chicago metro area, after a very chilly week that saw highs mostly in the low to mid 40s, the low 50s were finally reached Saturday. Highs this week will range from the mid 50s Monday and Tuesday into the mid 60s Wednesday and Thursday. Friday will only cool into the upper 50s. The normal high is now 58 and falling. Rain chances will increase beginning Tuesday afternoon, becoming more likely Wednesday into Thursday. It looks like it will be wet and mild for Halloween, any masks will likely become wet.
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