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Short Range Public Discussion
 
(Latest Discussion - Issued 0716Z Sep 24, 2021)
 
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 316 AM EDT Fri Sep 24 2021 Valid 12Z Fri Sep 24 2021 - 12Z Sun Sep 26 2021 ...Isolated instances of flash flooding possible across parts of New England, southern Florida, and the Southwest through this weekend... ...After a brief taste of autumn, well above average temperatures return to the Northern Plains by Saturday... A slow moving cold front pushing across the Northeast is expected to continue producing moderate to locally heavy rain across parts of New England today, with a few severe thunderstorms not out of the question as well. As the frontal boundary reaches central Maine on Saturday, it is expected to stall and lead to lingering showers. Widespread rainfall totals of 1 to 2 inches, with locally higher amounts, may lead to isolated instances of flash flooding. A Marginal Risk (level 1/4) of excessive rainfall has been issued for today across New England and for Saturday throughout most of Maine and coastal sections of New England. Farther south, this same cold front is currently draped over southern Florida and will be the focus for multiple rounds of showers and thunderstorms through the weekend across the southern half of the peninsula. The biggest concern with these storms will be the possibility of flash and urban flooding. Elsewhere, an unsettled weather pattern is in store for the Southwest thanks to a nearby upper-level low pressure system helping funnel monsoonal moisture into the region. Scattered showers and thunderstorms are forecast to potentially impact parts of Arizona, southwest New Mexico, and the Low Desert of Southern California. A few of these storms could produce intense rainfall rates and result in flash flooding. To highlight the concern, a Marginal Risk of excessive rainfall has been issued for today and Saturday across this section of the country. Temperature-wise, outside of New England much of the East will enjoy temperatures near or slightly below average through this upcoming weekend under a controlling high pressure system. The opposite is in store for the central U.S., as comfortable temperatures today are set to be replaced by well above average temperatures on Saturday. This is especially the case across the Northern Plains with highs jumping into the 80s by Saturday (nearly 20 degrees warmer than today). Snell Graphics are available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php