Drought - April 2007


NCDC transitioned to the nClimDiv dataset on Thursday, March 13, 2014. This was coincident with the release of the February 2014 monthly monitoring report. For details on this transition, please visit our public FTP site and our U.S. Climate Divisional Database site.

Contents Of This Report:
Map showing Palmer Z Index

Top of Page National Overview

  • A file containing the national monthly percent area severely dry and wet from 1900 to present is available for the severe to extreme and moderate to extreme categories.
  • Historical temperature, precipitation, and Palmer drought data from 1895 to present for climate divisions, states, and regions in the contiguous U.S. are available at the Climate Division: Temperature-Precipitation-Drought Data page in files having names that start with "drd964x" and ending with "txt" (without the quotes).


Top of Page Detailed Drought Discussion


At the end of April extreme drought was concentrated in the Southwest, the western High Plains, northern Minnesota, and the Southeast. Drought and abnormal dryness covered a broad swath from the Southwest through the northwestern Plains into the upper Midwest, as well as another area in most of the Southeast (May 1 Drought Monitor). Conditions in southern California and southwestern Arizona continued to deteriorate.

Storm systems throughout the month brought much needed precipitation to the Plains and upper Midwest and eliminated the drought conditions that had persisted for many months.

In the Southwest, Southeast and upper Midwest, soil moisture was low. At the end of the month vegetation was stressed over a large part of the country. Streamflow was low in a wide area of the Southeast.

Map showing Standardized Precipitation Index

Fires consumed over 50,000 acres in the Everglades in Florida in April. Low water levels in southern Florida delayed construction activities, caused increased silt in the intake of water supply systems, affected sales of landscape and horticulture materials, and led to more severe water usage restrictions. Alligators are being seen more frequently as they move in search of wetter habitat.

In central California water deliveries are being postponed, and farmers were affected by poor pastures and water shortages. Governor Arnold Schwarzenegger warned the state to plan for drought because the winter was extraordinarily dry. He also urged residents to conserve water.

Twenty-one counties in southeastern Georgia are in a state of emergency due to extreme fire danger from drought. A wildfire in the southeast part of the state was the largest in the history of Georgia.

Large ships on Lake Superior carried lighter loads to avoid striking the bottom of the lake. Recreational boats and sailboats had difficulty on Lake Superior because of low water levels. The water became so shallow that rowers in the Duluth, Minnesota Rowing Club could touch the bottom with their oars.

Impacts in drought-stricken areas have been collected and summarized by county at the National Drought Mitigation Center's Drought Impact Reporter.



Top of Page State/Regional/National Moisture Status


A detailed review of drought and moisture conditions is available for all contiguous U.S. states, the nine standard regions, and the nation (contiguous U.S.):

STATES:
Alabama Arizona Arkansas California Colorado Connecticut
Delaware Florida Georgia Idaho Illinois Indiana
Iowa Kansas Kentucky Louisiana Maine Maryland
Massachusetts Michigan Minnesota Mississippi Missouri Montana
Nebraska Nevada New Hampshire New Jersey New Mexico New York
North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania
Rhode Island South Carolina South Dakota Tennessee Texas Utah
Vermont Virginia Washington West Virginia Wisconsin Wyoming


REGIONS:
Northeast Region East North Central Region Central Region
Southeast Region West North Central Region South Region
Southwest Region Northwest Region West Region
Map showing the nine U.S. standard regions
NATIONAL:
Contiguous U.S.




Top of Page Pre-Instrumental Perspective


There is no April 2007 Paleoclimatic Perspective

Citing This Report

NOAA National Climatic Data Center, State of the Climate: Drought for April 2007, published online May 2007, retrieved on September 15, 2014 from http://www.ncdc.noaa.gov/sotc/drought/2007/4.