This article was originally published at 3:05 p.m. CDT on Monday, June 29. It was last updated with additional information at 3:46 p.m. CDT on Monday, June 29.

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OMAHA (DTN) -- U.S. corn and soybean crop conditions each declined 1 percentage point from the previous week, according to USDA NASS's weekly Crop Progress report released Monday.

A big heatwave will expand across the eastern half of the country this week, bringing extremely hot and humid conditions while drying out overly wet areas and shifting rain chances north, according to DTN Ag Meteorologist John Baranick.

CORN

-- Crop development: Corn silking was pegged at 9%, 2 percentage points ahead of last year's 7% and 3 percentage points ahead of the five-year average of 6%.

-- Crop condition: NASS estimated that 67% of the crop was in good-to-excellent condition, 1 point below the previous week and 6 points below last year's 73%. Eight percent of the crop was rated very poor to poor, 2 points above the previous week's 6% and 3 points above previous year of 5%. DTN Senior Analyst Dana Mantini noted that top-producing Iowa's corn crop remained rated 78% good to excellent, compared to just 60% in Illinois.

SOYBEANS

-- Crop development: 96% of soybeans had emerged as of Sunday, 3 points ahead of last year's pace and 1 point ahead of the five-year average of 95%. Soybeans blooming was pegged at 19%, 3 points ahead of last year's 16% and 4 points ahead of the five-year average of 15%. Soybeans setting pods was estimated at 4%, 1 point ahead of last year and up 2 points from the five-year average of 2%.

-- Crop condition: NASS estimated that 65% of soybeans that had emerged were in good-to-excellent condition, 1 point below the previous week and previous year of 66%. Iowa's soybean crop was rated 75% good to excellent, compared to 78% in Minnesota and 55% in Illinois, Mantini said.

WINTER WHEAT

-- Harvest progress: Harvest moved ahead 8 percentage points last week to reach 48% complete nationwide as of Sunday. That was 14 points ahead of last year's 34% and 9 points ahead of the five-year average pace of 39%. Mantini said the rapid pace is indicative of thin stands and high abandonment rates for hard red crops in the drought-affected Southern Plains. Meanwhile, Texas' winter wheat is at 82% complete, 3 points ahead of last year and 2 points ahead of the five-year average of 80%. Oklahoma harvest reached 98% complete compared to 95% last week, 32 points ahead of last year's 66% and 17 points ahead of the five-year average of 81%.

-- Crop condition: An estimated 26% of winter wheat was rated good to excellent as of June 28, steady with the previous week and 22 points below 48% a year ago, according to NASS.

SPRING WHEAT

-- Crop development: Thirty-two percent of spring wheat was headed, 3 points behind last year's pace of 35% and 2 points below the five-year average of 34%.

-- Crop condition: NASS estimated that 59% of the crop was in good-to-excellent condition nationwide, up 5 points from 54% the previous week.

THE WEEK AHEAD IN WEATHER

This week's heatwave could benefit many areas by drying excessive moisture in the South and boosting rain chances in the Northern Plains and northern Corn Belt, though the Central and Southern Plains may see increasing crop stress, according to DTN Ag Meteorologist John Baranick,

"A big heatwave has already started to move into the middle of the country on Monday and will be expanding across the eastern half throughout the week," Baranick said. "Extremely hot and humid conditions with a lot of highs in the 90s, lows in the 70s, and dew point temperatures in the 70s would normally be a major cause of concern ahead of corn pollination. However, this may be the type of heatwave the country needs.

"First of all, it will leave areas across the South and Southeast much drier this week. Areas that have been excessively wet will get a chance to use up some of that water or have ponding dry out with the extreme heat.

"Secondly, the heat will push the storm track to the north, giving multiple opportunities for some of the drier areas of the Northern Plains and northern Corn Belt to get some heavy precipitation. We will have to watch out for severe weather every day, but we should get multiple opportunities to provide some relief. We'll also see some spotty showers developing across the Delta, Southeast and into the Midwest later this week as the humidity peaks.

"Areas that will more likely be left out of the better conditions will be in the Central and Southern Plains. The heat will be in play for most areas, but precipitation will be very spotty. We could see some significant stresses developing for crops this week. It may be more beneficial to continue the wheat harvest, though.

"The heatwave comes to an end with a system that moves through over the holiday weekend and into early next week. Temperatures will return to a more summer-like heat, but we'll see showers continuing next week as well."

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To view weekly crop progress reports issued by National Ag Statistics Service offices in individual states, visit http://www.nass.usda.gov/…. Look for the U.S. map in the "Find Data and Reports by" section and choose the state you wish to view in the drop-down menu. Then look for that state's "Crop Progress & Condition" report.

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Editor's Note: How are your crops looking? Are they better, worse or right on track with USDA NASS' observations this week? Send us your comments, and we'll include them in next week's Crop Progress report story. You can email comments to talk@dtn.com. Please include the location of where you farm.

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National Crop Progress Summary
	This	Last	Last	5-Year
	Week	Week	Year	Avg.
Corn silking	9	5	7	6
Soybeans emerged	96	93	93	95
Soybeans blooming	19	9	16	15
Soybeans setting pods	4	NA	3	2
Winter wheat harvested	48	40	34	39
Spring wheat headed	32	16	35	34
Cotton planted	97	92	95	97
Cotton squaring	37	27	38	36
Cotton setting bolls	9	5	8	9
Sorghum planted	91	84	91	92
Sorghum headed	19	NA	17	19
Oats headed	74	61	72	70
Barley headed	39	20	32	32
Rice headed	19	13	18	14
Peanuts pegging	38	23	39	37

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National Crop Condition Summary
(VP=Very Poor; P=Poor; F=Fair; G=Good; E=Excellent)
	VP	P	F	G	E
Corn
This Week	2	6	25	53	14
Prev Week	1	5	26	56	12
Prev Year	1	4	22	58	15
DTN 5-Yr Avg	5	10	26	46	13
Soybeans
This Week	2	6	27	55	10
Prev Week	1	5	28	56	10
Prev Year	2	5	27	55	11
DTN 5-Yr Avg	4	10	28	47	11
Spring Wheat
This Week	1	6	34	55	4
Prev Week	1	5	40	50	4
Prev Year	1	13	33	48	5
DTN 5-Yr Avg	8	16	29	40	7
Winter Wheat
This Week	21	26	27	22	4
Prev Week	20	26	28	22	4
Prev Year	6	14	32	41	7
DTN 5-Yr Avg	14	18	31	32	6
Rice
This Week	1	3	22	56	18
Prev Week	0	2	27	55	16
Prev Year	0	2	18	56	24
DTN 5-Yr Avg	1	3	22	58	17
Oats
This Week	8	13	27	45	7
Prev Week	7	12	28	47	6
Prev Year	6	9	24	54	7
DTN 5-Yr Avg	7	9	30	48	6
Barley
This Week	1	7	40	49	3
Prev Week	1	5	45	47	2
Prev Year	1	11	45	41	2
DTN 5-Yr Avg	1	7	39	48	4
Peanuts
This Week	2	6	30	56	6
Prev Week	2	5	30	58	5
Prev Year	0	3	25	62	10
DTN 5-Yr Avg	2	8	32	51	7
Cotton
This Week	4	12	36	41	7
Prev Week	3	10	34	45	8
Prev Year	5	12	32	44	7
DTN 5-Yr Avg	12	17	30	34	6

EllaMae Reiff can be reached at ellamae.reiff@dtn.com

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