Casebook 19 June 2003: Difference between revisions

Latest revision as of 11:17, 6 November 2009

CSU-CHILL Casebook: 19 June, 2003

Scattered non-severe thunderstorms developed within the CSU-CHILL coverage area during the evening of 19 June 2003 (UTC date; locally 18 June). Some of these storms produced locally intense rain rates. (The NWS issued a flash flood warning for southeastern Larimer County at 0220 UTC). A thunderstorm RHI scan through a convective echo over Fort Collins was done at 0253 UTC (see VCHILL link below). The near-surface echo core contained reflectivity levels of ~50 dBZ, $Z_{dr}$ values of ~ +2 - 3 dB, and appreciable differential propagation phase shift. This combination of radar measurements is typical of high (~ 50 mm / hr or more) rain rates. Observers in Fort Collins reported "torrential rain" during the storm's passage.

example in VCHILL

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 ==CSU-CHILL Casebook: 19 June, 2003==
-Scattered thunderstorms developed within the CSU-CHILL coverage area during the evening of 19 June 2003 (UTC date; locally 18 June).  Some of these storms produced locally intense rain rates.  One such heavy rain area passed through southeastern Larimer County where a flash flood warning was issued around 0220 UTC.  The echo cores in this area typically contained reflectivity levels of ~50 dBZ, <math>Z_{dr}</math> values of ~ +2 - 3 dB, and appreciable differential propagation phase shift.  (See the echo area approximately 40 km west of the CHILL radar at 0153:47 UTC).  This echo area subsequently produced torrential rain over the western portions of Ft. Collins.
+Scattered non-severe thunderstorms developed within the CSU-CHILL coverage area during the evening of 19 June 2003 (UTC date; locally 18 June).  Some of these storms produced locally intense rain rates.  (The NWS issued a flash flood warning for southeastern Larimer County at 0220 UTC).  A thunderstorm RHI scan through a convective echo over Fort Collins was done at 0253 UTC (see VCHILL link below).  The near-surface echo core contained reflectivity levels of ~50 dBZ, <math>Z_{dr}</math> values of ~ +2 - 3 dB, and appreciable differential propagation phase shift.    This combination of radar measurements is typical of high (~ 50 mm / hr or more) rain rates.  Observers in Fort Collins reported "torrential rain" during the storm's passage.
-[[Casebook 3 June 2003|prev]] [[Casebook 18 August 2003|next]]
+[http://chill.colostate.edu/java/vchill.php?sweep=vchill.chill.colostate.edu:2510*/dsk/dnf/data/2003/06/19/%20DIR*CHL20030619_025345%20MPRHI1%20RHI*Sweep%2001&center=0.,0.&range=50.&plot=dBZ example in VCHILL]
+[[Casebook 3 June 2003|prev]] [[Casebook 29 July 2003|next]]
 [[Category:Casebook|20030619]]
-[[Category:Flash Flood]]
+[[Category:Heavy Rain|20030619]]
-[[Category:Heavy Rain]]