Prognostic Meteorological Discussion
Issued by NWS
Issued by NWS
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779 FXUS01 KWBC 012000 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 PM EST Sun Nov 1 2026 Valid 00Z Mon Nov 02 2026 - 00Z Wed Nov 04 2026 ...Impactful flash flooding expected in the Great Basin and Four Corners through tonight... ...Heavy rainfall threat continues along the east coast of Florida through Monday... ...Intensifying low pressure system brings gusty winds, locally heavy rain, and severe weather to the Great Plains... A widespread moderate to heavy rainfall event is currently in full swing across the Four Corners region this Sunday afternoon as a moisture-ladden low pressure system from the subtropical Pacific interacts with a deepening upper-level trough moving further inland into the southwestern U.S. WPC continues to highlight a very broad slight risk of flash flooding area for much of the Four Corners states through tonight, together with a moderate risk from central Arizona to southwestern Utah, and just to the north and east of the Four Corners. This merger will pick up its eastward motion, tapering the heavy precipitation from west to east across the Four Corners region through tonight. High-elevation wet snow can also be expected especially later tonight over the northern and central Rockies as far south as the San Juan Mountains, where a Winter Storm Warning and a handful of Winter Weather Advisories are in effect. In addition, the Storm Prediction Center (SPC) is highlighting a slight risk of severe thunderstorms from the southern Rockies to the southern High Plains through tonight into early Monday morning. Monday will feature a rather strong and deep cyclone spinning up rapidly and expanding across the northern Great Plains. Much of the Northern Plains will wake up to increasing winds, showers, and embedded thunderstorms to kick off the work week. The Central and Southern Plains can expect to see thunderstorms potentially turn severe later on Monday with locally heavy rainfall possible. SPC is highlighting portions of the Central and Southern Plains for a slight risk of severe thunderstorms Monday and Monday night. On Tuesday, a sweeping cold front will shift the focus for unsettled weather from the Plains into the Mid/Lower Mississippi Valley. Meanwhile, showers and embedded thunderstorms enhanced by sustained onshore flow from the Atlantic combined with weak upper-level troughing arriving from the Gulf Coast have resulting in deep convection and locally heavy rainfall for portions of south-central Florida Panhandle today. Continued onshore flow from a large high pressure system sliding off the East Coast will bring additional heavy rainfall threat for portions of southern Florida Peninsula on Monday with isolated to scattered flash flooding potential. In contrast, the same high pressure system will maintain dry weather for much of the eastern U.S. with colder than normal conditions in New England but milder than normal to the south. Kong/Asherman Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$