Drought Monitor Weekly: Record High Temps in Some Areas

    Drought stressed corn in Nebraska. Photo: Kristen Ulmer, UN-L

    Summary

    As Tropical Storm Isaias churned through the northern Caribbean and then northward along the east coast of the United States, an active pattern from the central Plains through the Midwest also brought precipitation with it.

    Temperatures were cooler through the center of the country, with departures of 6 to 8 degrees below normal in Kansas and Oklahoma while temperatures were well above normal in the Northwest, Southwest and from the Mid-Atlantic up into New England.

    Several areas broke or tied temperature records for the month: Phoenix had their all-time warmest month ever with an average temperature of 98.9 degrees and Tucson also had their warmest July ever at 91.5 degrees, breaking the previous warmest July by almost a full degree (90.6 degrees in 2005).

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    Sitka, Alaska reached 88 degrees on July 31, tying an all-time record high originally set on July 30, 1976. Richland, Washington recorded 113 degrees on July 30, tying an all-time record high first achieved on August 5, 1961.

    Southeast

    As has been the recent pattern, precipitation has been spotty throughout the region, with some coastal areas of Florida, Georgia, and into the Carolinas impacted by Isaias. Overall, the region is drying out and will need to be monitored for rapidly changing conditions over the coming weeks.

    Temperatures were near normal to 2-4 degrees above normal for the week. This week, abnormally dry conditions were improved over northern portions of Georgia and South Carolina into both North Carolina and Virginia where recent rains were enough to shift the conditions for the time being.

    Abnormally dry conditions were expanded in portions of southern Alabama and into southern Georgia with an expansion of moderate drought in this region as well. A new area of moderate drought was added to central Georgia due to continued dryness in the region.

    Moderate drought conditions were improved over northern Virginia this week too.

    Midwest

    Temperatures were cooler than normal over the northern and western portions of the region and near normal to slightly above in the eastern portions. Departure from normal temperatures were 2-4 degrees below normal in Missouri, Illinois, and portions of southern Iowa.

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    Wet conditions dominated the region from Missouri to southern Ohio where 200+ percent of normal precipitation was recorded for the week. Improvements were made to the abnormally dry and moderate drought conditions in southern Missouri.

    Abnormally dry and moderate drought conditions were improved in Illinois, Indiana, Kentucky, and into portions of Ohio in response to the greatest rains. Portions of the upper Midwest continue to remain dry, with new areas of abnormally dry conditions introduced into northern Minnesota, western Wisconsin, southeast Minnesota and northeast Iowa.

    In western Iowa, the areas of moderate and severe drought were expanded with a new area of extreme drought introduced this week.

    High Plains

    Cooler than normal temperatures helped to slow down some of the drought development in the region this week. Temperatures were generally 2-4 degrees below normal, with pockets in Kansas that were 6-8 degrees below normal.

    Precipitation was mixed as areas of eastern Kansas, eastern Wyoming, central South Dakota, south central and southwest Nebraska and far southwest Kansas all had above-normal precipitation for the week with thunderstorm activity.

    Improvements to the moderate drought and abnormally dry conditions were made in southeast Kansas and central Nebraska. Moderate drought was expanded in the Nebraska panhandle and northeast Colorado while abnormally dry conditions were introduced here as well.

    A new area of severe drought was added in eastern Nebraska in response to dryness that has lingered in the region since last fall. Moderate drought was expanded in southeast Wyoming and abnormally dry conditions were expanded in northwest Wyoming.

    South

    In typical summer fashion, precipitation was spotty through the region, with Oklahoma and Arkansas and into northern Texas recording the most widespread precipitation this week. Portions of the Texas panhandle and central into west Texas as well as eastern Arkansas and into Mississippi remained dry this week.

    Temperatures were 2-4 degrees below normal in Arkansas, Louisiana, western Mississippi, east Texas and north Texas. Portions of central Oklahoma were 6-8 degrees below normal for the week while much of west Texas was normal to 4-6 degrees above normal.

    Almost a full category improvement was made from central Oklahoma into northwest Arkansas in response to both the cooler temperatures and above-normal precipitation. Areas of southeast Texas were improved with both abnormally dry and moderate drought reduced.

    Areas of central and west Texas had degradation with an expansion and introduction of extreme drought in this region. Continued improvement occurred over the panhandle of Texas where rains have helped local conditions while neighboring counties saw degradation.

    Abnormally dry conditions were improved in Louisiana but were expanded in northern Mississippi.

    West

    Well above normal and record-setting temperatures continued in the region, with many areas 2-4 degrees or more above normal for the week. Much of the region was dry for the week with only some spotty precipitation in places; the bulk of the precipitation was in eastern New Mexico and southwest Colorado as the monsoon brought some relief to this region.

    The hot and dry conditions allowed for a full category degradation over much of Arizona and into portions of southern Nevada and southern California. Even with the rains in New Mexico, the issues related to drought continued and further degradation was shown in the north and southeast portions of the state this week as a mix of both short and long-term issues continue.

    Northeast

    Temperatures in the region were generally 2-4 degrees above normal with some coastal areas in New England 6-8 degrees above normal. Precipitation was mixed, with the bulk of the precipitation coming into the region after the Tuesday morning cutoff for consideration for this week’s map.

    Areas of the Mid-Atlantic did record above-normal precipitation, mainly in western Maryland, Virginia, and into West Virginia.

    For this week’s map, abnormally dry conditions were improved in West Virginia and into Maryland. Moderate drought was improved on the Maryland border with Pennsylvania.

    In New York, abnormally dry conditions were improved in the western portions of the state while moderate drought was expanded over Massachusetts, Rhode Island, and Connecticut. Conditions will be assessed next week to determine any improvements associated with Isaias.

    Alaska, Hawaii, and Puerto Rico

    With Isaias impacting Puerto Rico with up to and over 10 inches of rain in places, a full 2 category improvement was made this week over much of the island, with only a few remaining pockets of abnormally dry conditions remaining.

    Alaska had abnormally dry conditions expand over the Prince William Sound region while on Hawaii, improvements were made on the Big Island and Kauai to both moderate drought and abnormally dry conditions in response to recent rains over those islands.

    Looking Ahead

    Over the next 5-7 days, it is anticipated that the West remains dry with only light precipitation over portions of New Mexico and southeast Arizona and into the coastal regions of the Pacific Northwest. The greatest precipitation is anticipated over the Midwest and areas from Florida north along the East coast.

    Temperatures during this time will be warmest over the West with departures of 3-6 degrees above normal widespread over the Southwest and into the Rocky Mountains. Cooler than normal temperatures are projected over the lower Mississippi Valley with departures of up to 3 degrees below normal.

    The 6-10 day outlooks show the greatest likelihood of above-normal temperatures over the areas east of the Rocky Mountains, with the greatest probabilities over southern New Mexico and the Great Lakes. There are also above-normal chances of below-normal temperatures over the west coast and into the Great Basin.

    The greatest chances of above-normal precipitation are over the eastern half of the country, centered on the Midwest, and also over the Pacific Northwest. The highest chances of below-normal precipitation are centered over Colorado and New Mexico and dominating the Rocky Mountain states and into the Plains.




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