Descriptor pages for multiple versions of a publication may be retrieved. Users should carefully check the version or date to match publications to their needs.
Document Identification
Title
Two record rainstorms during August 2002 in the Midwest. (2003) [DCS-2003-02]
Access this Publication
Connect to the document
- Two record rainstorms during August 2002 in the Midwest. (20061005194154_ISWSDCS2003-02.pdf)
The OCLC Open WorldCat number for the electronic document record is '160145043'.
Description
Two August 2002 rainstorms, one centered in Illinois and Indiana on August 18-19, and one in Iowa, Illinois, and Wisconsin on August 21-22, created record-setting point rainfalls of >10 inches and >12 inches, respectively. Return intervals of both storms' heavy rain amounts for 3-, 6-, and 12- hour durations exceeded once in 100-year values. Storm characteristics were similar to those of 36 past rainstorms during 1951-2001 that also were investigated in comparable detail. The similarities included the fact that most of the rain fell over 8 hours at night, storm areas were oriented west-east, and the region with >2 inches covered more than 9,000 square miles. Synoptically, conditions were similar to those of most past rainstorms: the storms developed south of an west-east-oriented front, precipitable water values were exceptionally high, >1.7 inches, and the frontal position and low-level jet stream proximity led to training of thunderstorms along the same path. However, the August 2002 rainstorms were different than past rainstorms in that the two storm events occurred just 2.5 days apart and in relatively adjacent areas. No other major past storms had occurred in such close time proximity. Both storms occurred where the prior 2.5-month rainfall was much below normal, creating much below normal soil moisture and droughtlike conditions for crops. All 36 previous major assessed rainstorms occurred after prolonged periods of average to much above average rainfall. This pre-storm difference in moisture conditions greatly affected the storms' impacts, and both August storms produced small economic losses compared to those of comparable prior storms. A much greater percentage of total storm rainfall infiltrated the soil, resulting in less runoff. High early peak flows in rivers where the heaviest rain fell quickly returned to normal levels within 10-22 days. Flooding, mostly near river courses, quickly dissipated, and flood losses were minimal. The major economic impact of the two August storms related to the added soil moisture and, in turn, the positive effects on soybean crops. Soybeans were in the pod-filling stage and shy of soil moisture when the storms occurred, and the rain-filled soils led to increased yields valued at $51 million in Illinois and Iowa.
Subject Classification
Sample text from the file
.Two Record Rainstorms during August 2002 in the Midwest by Stanley A. Changnon, Steven D. Hilberg, and David Changnon Illinois State Water Survey Division of the Illinois Department of Natural Resources 2003 Data/Case Study 2003-02 Two Record Rainstorms during August 2002in the Midwest Stanley A. Changnon, Steven D. Hilberg, and David Changnon Data/Case StudyMidwestern Regional Climate Center Illinois State Water Survey December 2003 iiiii Abstract Two August 2002 rainstorms, one centered in Illinois and Indiana on August 18-19, and onein Iowa, Illinois, and Wisconsin on August 21-22, created record-setting point rainfalls of >10 inches and >12 inches, respectively. Return intervals of both storms' heavy rain amounts for 3-,6-, and 12- hour durations exceeded once in 100-year values. Storm characteristics were similar to those of past rainstorms during 1951-2001 that also were investigated in comparable detail.The similarities included the fact that most of the rain fell over hours a
Issuing Agency
Illinois State Water Survey
Contact
Name: Pat Morse
Organization: Illinois State Water Survey
2204 Griffith Dr.
Champaign, IL 61820
Phone: 217 244-5459
Fax: 217 333-4983
Document Descriptive Information
File Data
- MIME Type: application/pdf
- Language(s): EN-English
- Creation Date (from issuing agency): 9 24 2004
- File Modification Date On Web Server: Mon, 26 Apr 2004 20:48:42 GMT
- Document Modification Date (from issuing agency): 4 26 2004
- Date Accepted Into Depository: Wed, 18 Oct 2006 19:06:22 GMT
- Reported Length: 1830512 bytes
- Checksum Algorithm: MD5 SHA1
- Document File Checksum:
- 20061005194154_ISWSDCS2003-02.pdf - checksum='02b4b7cc1a10ffd57542988c26e0454e' byte count= '1830512'
- Web Address On Date Of Deposition: http://www.sws.uiuc.edu/pubdoc/DCS/ISWSDCS2003-02.pdf
Other Results from the Document Acquisition System
- Accept Ranges: bytes
- Connection Parameters: keep-alive
- Entity Tag: c3faf2dbcf2bc41:8d4
- Host Machine Dns Address: 130.126.104.13
- New X- Powered- By: ASP.NET
- Observed Transfer Rate: 4.72 MB/s
- Server Reported Date Of Transfer: Fri, 06 Oct 2006 00:41:54 GMT
- Server Response Code: HTTP/1.1 416 Requested Range Not Satisfiable
- Server Specification: Microsoft-IIS/6.0
- Transfer Completion Localhost Time HHMMSS: 19:41:54
- Transfer Initiation Localhost Time HHMMSS: 19:41:54
- Tries Required To Retrieve: 2