CHICAGO | Fri Jan 18, 2013 8:48am EST

CHICAGO (Reuters) - Dry weather should continue through at least the end of January in the drought-stricken U.S. Plains and a blast of Arctic cold air in the Midwest early next week poses a threat to unprotected livestock and possibly some wheat, an agricultural meteorologist said on Friday.

"The hard red winter wheat belt in the Plains looks quiet, dry and cooler next week, but there shouldn't be a cold air threat in the Plains," said John Dee, meteorologist for Global Weather Monitoring.

Dee said temperatures would fall to zero (degrees Fahrenheit) or below early next week in the northern Midwest, roughly north of Interstate 80. Coldest readings will be in the northern states of North and South Dakota, Minnesota, Wisconsin, northern Iowa, Illinois and Michigan.

"There's not a lot of snow cover so there is the potential for some damage. Zero readings could reach as far west as Nebraska," he said.

Commodity Weather Group (CWG) on Friday said most of the United States remained dry near the end of the week and showers next week would be limited to the eastern Midwest.

"Drought relief will be limited," said Joel Widenor, CWG meteorologist.

Cold air will push into the U.S. early next week and again late in January but the cold snaps do not appear to be strong enough to damage either U.S. wheat or Florida citrus, according to CWG's Friday report.

A series of rain showers helped ease drought conditions in parts of the United States over the last week, but drought expanded slightly in parts of the U.S. Plains, according to a report issued on Thursday.

Officials in north-central Oklahoma declared a state of emergency due to record-low reservoir conditions. Public and private interests throughout the central United States hardest hit by drought were examining measures to try to cope with ongoing drought.

The government declared much of the central and southern U.S. Wheat Belt a natural disaster area on Wednesday last week due to persistent drought threatening the winter wheat harvest.

In its first disaster declaration of the new year, the Agriculture Department made growers in large portions of four major wheat-growing states - Kansas, Colorado, Oklahoma and Texas - eligible for low-interest emergency loans.

(Additional reporting by Carey Gillam in Kansas City; Editing by Dale Hudson)

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Snow blows across US Highway 218 as near whiteout conditions begin in Waterloo, Iowa, December 20, 2012.

CHICAGO | Fri Dec 21, 2012 9:04am EST

CHICAGO (Reuters) - The first major snow storm of winter did little to ease the worst drought in more than 50 years in the crop growing Central Plains and Midwest, while snarling traffic and hampering feeding and transportation of livestock.

MDA EarthSat Weather meteorologist Kyle Tapley said six to 12 inches or more snow fell from Nebraska into Wisconsin during the past two days, the equivalent of about 0.50 inch to 1.00 inch of rain, that will help ease but not eliminate drought worries.

Tapley said roughly 10 inches of moisture or rainfall would be needed in a large portion of the Plains and Midwest to break the drought of 2012 that trimmed crop production and sapped soil moisture reserves.

"The snow put a small dent in the drought and I don't see any moisture for next week," Tapley said.

Commodity Weather Group (CWG) said the snow favored Wisconsin, far eastern Iowa, far northwestern Illinois and west-central Michigan on Thursday with better than a foot of snow in Wisconsin.

"Another storm over the weekend into early next week will bring rain to the Delta and Southeast and a chance for snow near the Ohio River Valley," said CWG meteorologist Joel Widenor.

Widenor said prospects for more rain or snow in the southern Plains hard red winter wheat producing states were more limited on Friday.

But there could be some light rain or snow in the area on Tuesday but "this would provide only limited additional drought relief," Widenor said.

Winterkill threats for wheat and frost threats for Florida citrus are still limited, despite cooling the next two weeks, according to CWG's advisory on Friday.

(Reporting By Sam Nelson; Editing by Grant McCool)

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