In the West, cool weather accompanies rain and snow showers in northern California and the Pacific Northwest. Lingering warmth is confined to the southern Rockies.
On the Plains, cooler air has overspread the northwestern half of the region. A few rain and snow showers are providing limited drought relief from the Dakotas into Wyoming. Meanwhile on the southern Plains, a final day of warm weather is promoting winter wheat growth and summer crop harvesting.
In the Corn Belt, a cold front is draped across the upper Midwest. Elsewhere, warm, mostly dry weather favors winter wheat germination and establishment, as well as late-season harvest efforts.
In the South, easterly winds are gradually increasing across Florida’s peninsula in conjunction with Tropical Storm Sandy’s approach. Elsewhere, very warm, dry weather is conducive to summer crop harvesting.
Outlook: The complex interaction between Tropical Storm Sandy (currently approaching Jamaica), a cold front crossing the nation’s mid-section, and a blocking high-pressure system over the northern Atlantic Ocean will result in a low-confidence, potentially high-impact forecast across the eastern U.S. Toward week’s end, coastal impacts will include large waves and beach erosion. Inland—especially in the Northeast—conditions developing during the weekend and persisting well into next week should include high winds and heavy rainfall. Precipitation may eventually change to snow in some Eastern mountain locations. Farther west, mid- to late-week rainfall associated with the cold front could total 1 to 2 inches in the Midwest. Similar precipitation totals should also occur during the next 5 days in the Northwest. In contrast, dry weather will prevail from southern California to the southern Plains. Cold air will overspread the remainder of the Plains by Thursday and engulf the East (excluding New England) by early next week. The NWS 6- to 10-day outlook for October 29 – November 2 calls for above-normal temperatures in New England and the West, while cooler-than-normal conditions will prevail in most areas from the Plains to the East Coast. Meanwhile, near- to below-normal rainfall across the majority of the U.S. will contrast with wetterthan- normal weather in the Northwest and from the lower Great Lakes region into the Northeast.