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Title: A comparison of NEXRAD WSR-88D radar estimates of rain accumulation with gauge measurements for high- and low-reflectivity horizontal gradient precipitation events.

Abstract

Radar-estimated rainfall amounts from the NEXRAD Weather Surveillance Radar precipitation accumulation algorithm were compared with measurements from numerous rain gauges (1639 radar versus gauge comparisons). Storm total rain accumulations from 43 rain events from 10 radar sites were analyzed. These rain events were stratified into two precipitation types: (1) high-reflectivity horizontal gradient storms and (2) low-reflectivity horizontal gradient events. Overall, the radar slightly overestimated rainfall accumulations for high-reflectivity gradient cases and significantly underestimated accumulations for low-reflectivity gradient cases. Varying degrees of range effects were observed for these two types of precipitation. For high-reflectivity gradient cases, the radar underestimated rainfall at the nearest ranges, overestimated at the middle ranges, and had fairly close agreements at the farthest ranges. A much stronger range bias was evident for low-reflectivity gradient cases. The radar underestimated rainfall by at least a factor of 2 in the nearest and farthest ranges, and to a somewhat lesser extent at midranges.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
938250
Report Number(s):
ANL/ER/JA-28539
TRN: US200908%%147
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Atmos. Ocean. Technol.; Journal Volume: 16; Journal Issue: 11, Pt. 2 ; Nov. 1999
Country of Publication:
United States
Language:
ENGLISH
Subject:
54 ENVIRONMENTAL SCIENCES; ALGORITHMS; COMPARATIVE EVALUATIONS; RADAR; RAIN; STORMS; WEATHER; METEOROLOGY; FORECASTING; PERFORMANCE

Citation Formats

Klazura, G. E., Thomale, J. M., Kelly, D. S., Jendrowski, P., Environmental Research, Univ. of Oklahoma, and National Weather Service. A comparison of NEXRAD WSR-88D radar estimates of rain accumulation with gauge measurements for high- and low-reflectivity horizontal gradient precipitation events.. United States: N. p., 1999. Web. doi:10.1175/1520-0426(1999)016<1842:ACONWR>2.0.CO;2.
Klazura, G. E., Thomale, J. M., Kelly, D. S., Jendrowski, P., Environmental Research, Univ. of Oklahoma, & National Weather Service. A comparison of NEXRAD WSR-88D radar estimates of rain accumulation with gauge measurements for high- and low-reflectivity horizontal gradient precipitation events.. United States. doi:10.1175/1520-0426(1999)016<1842:ACONWR>2.0.CO;2.
Klazura, G. E., Thomale, J. M., Kelly, D. S., Jendrowski, P., Environmental Research, Univ. of Oklahoma, and National Weather Service. Mon . "A comparison of NEXRAD WSR-88D radar estimates of rain accumulation with gauge measurements for high- and low-reflectivity horizontal gradient precipitation events.". United States. doi:10.1175/1520-0426(1999)016<1842:ACONWR>2.0.CO;2.
@article{osti_938250,
title = {A comparison of NEXRAD WSR-88D radar estimates of rain accumulation with gauge measurements for high- and low-reflectivity horizontal gradient precipitation events.},
author = {Klazura, G. E. and Thomale, J. M. and Kelly, D. S. and Jendrowski, P. and Environmental Research and Univ. of Oklahoma and National Weather Service},
abstractNote = {Radar-estimated rainfall amounts from the NEXRAD Weather Surveillance Radar precipitation accumulation algorithm were compared with measurements from numerous rain gauges (1639 radar versus gauge comparisons). Storm total rain accumulations from 43 rain events from 10 radar sites were analyzed. These rain events were stratified into two precipitation types: (1) high-reflectivity horizontal gradient storms and (2) low-reflectivity horizontal gradient events. Overall, the radar slightly overestimated rainfall accumulations for high-reflectivity gradient cases and significantly underestimated accumulations for low-reflectivity gradient cases. Varying degrees of range effects were observed for these two types of precipitation. For high-reflectivity gradient cases, the radar underestimated rainfall at the nearest ranges, overestimated at the middle ranges, and had fairly close agreements at the farthest ranges. A much stronger range bias was evident for low-reflectivity gradient cases. The radar underestimated rainfall by at least a factor of 2 in the nearest and farthest ranges, and to a somewhat lesser extent at midranges.},
doi = {10.1175/1520-0426(1999)016<1842:ACONWR>2.0.CO;2},
journal = {J. Atmos. Ocean. Technol.},
number = 11, Pt. 2 ; Nov. 1999,
volume = 16,
place = {United States},
year = {Mon Nov 01 00:00:00 EST 1999},
month = {Mon Nov 01 00:00:00 EST 1999}
}