In contrast to the prior week, most of the country had a relatively dry week, with the significant exception of the Pacific Northwest and northern Intermountain West. Amounts over 1.5 inches were common, with parts of the Cascades and the coastline recording 4 to as much as 8 inches of precipitation.
Elsewhere, most of New England had moderate precipitation, with over 1.5 inches falling on southern Maine and adjacent New Hampshire.
Areas from the upper Midwest eastward through the Great Lakes Region and lower Northeast recorded 0.25 to locally 1.0 inch, but the entire remainder of the nation received little or none. But given the time of year, the dry week did not lead to widespread deterioration.
Most areas did not change, and significant improvement was limited to the Pacific Northwest.
Little or no precipitation fell on the region; however, moisture deficits are not sufficient to introduce broadscale D0 conditions from Virginia through Georgia. Extant areas of abnormal dryness persisted, with some expansion in central Florida and part of western Georgia.
Farther east, larger areas of D0 were introduced in Alabama in conjunction with larger moisture deficits in adjacent parts of the South Region. Over the new areas of D0, Precipitation has totaled 2 to 5 inches below normal over the past 60 days.
Little or no precipitation fell region-wide, leading to a few areas of deterioration in southern and western Texas. D2 to D4 conditions have become entrenched. Meanwhile, the dry weather led to the introduction of abnormal dryness through much of Tennessee and large sections of Mississippi. Smaller areas developed in Arkansas and Louisiana.
AgFax Weed Solutions
Since mid-October 2020, between 4 and 8 inches less precipitation than normal in a swath from northeastern Louisiana through northwestern Mississippi and western Tennessee.
Most of the region recorded light to moderate precipitation (0.25 to locally 1.0 inches), with little or none falling on the Ohio Valley, northwestern Minnesota, and Missouri. The dry week did not change conditions enough to bring in any improvement, save a portion of southeastern Missouri adjacent to the dryness farther south, and small areas in the D2 to D3 areas established in northwestern Iowa.
Similar to conditions in other regions, little or no precipitation was observed this week, outside parts of eastern North Dakota. Almost the entire region was unchanged compared to last week keeping most areas intact.
Exceptions were found in eastern North Dakota, where light precipitation was sufficient to reduce the extent of D2 conditions. Farther west, small areas of deterioration were noted in north-central Wyoming (to D1) and the west-central Dakotas (deteriorating to D1-D2).
In stark contrast to areas farther east and south, heavy precipitation was dropped on parts of the Pacific Northwest and the northern Intermountain West. Much of the Idaho Panhandle and adjacent parts of Montana reported heavy precipitation, with the highest elevations measuring up to 4 inches.
Farther west, heavy precipitation also soaked the Cascades, and the Pacific Coast from Washington southward to northwestern California. Most of these areas – including lower elevations between the Cascades and the coastal areas – recorded at least 1.5 inches of precipitation while parts of the higher elevations were covered by 4 to locally 8 inches of precipitation.
Patches of improvement were introduced as a result, with D3 removed entirely from central Washington, and spotty reductions in the D0 to D3 coverage across Oregon and northwesternmost California.
With large sections of the central and southern parts of the West Region already in D3 to D4, not much more deterioration can be introduced, but a few small areas deteriorated enough to be reflected on the map, specifically north-central Utah (to D2), interior northeastern Utah (to D4), and southeasternmost New Mexico along the Mexican border (to D4).
Light to moderate precipitation fell on New England while little or none was recorded farther south. Most areas remained unchanged due to lingering long-term moisture deficits, except in southern Maine, where 1.5 to 2.0 inches of precipitation prompted removal of D0.
Alaska, Hawaii, and Puerto Rico
Heavy precipitation pushed into much of Hawaii late in the period. No improvement was introduced this week, allowing for impact assessment after the entire storm moves away. Meanwhile, unremarkable weather kept dry areas unchanged.
The most significant weather for the next 5 days (January 21-26, 2021) will be widespread heavy precipitation across the Southeast. Between 1.5 and 4.0 inches are forecast from eastern Texas through southern Alabama and northern Georgia. Light to moderate amounts should dampen the rest of the Southeast.
Farther west, from the central and southern Rockies to the California Coast, significant precipitation will fall on the higher elevations. Most of the mountains are expecting 1 to 3 inches. The rest of the Southwest and the Pacific Northwest are expecting 0.5 to 2.5 inches.
Elsewhere, light to moderate precipitation of up to 0.5 inch is forecast for the upper Midwest, and little none is expected over the Northeast, High Plains, and the remainder of the Midwest and Great Pains.
The 6-10 day CPC extended range outlook (January 27-31, 2021) favors surplus precipitation from the Rockies to the West Coast, most of the Midwest, and part of the interior Southeast. Much of Alaska is also expecting above-normal precipitation.
Meanwhile, the odds favor subnormal precipitation across Florida, in the Northeast and Ohio Valley, southern Plains, and eastern Montana. Meanwhile, cooler than normal weather is anticipated in the Northeast, the middle Atlantic States, and a broad area from the Rockies to the West Coast.
In contrast, enhanced chances for above-normal temperatures cover roughly the southeastern quarter of the country