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<br />Date sent: <br />From: <br />To: <br />Subject: <br /> <br />Sun, 12 Apr 1998 23:40:25 -0600 (MDT) <br />Nolan Doesken <nolan@ulysses.,atmos.coll:>State.edu> <br />MLR@riverside.com <br />Re: Report <br /> <br />On Sun, 12 Apr 1998, Nolan Doesken wrote: <br /> <br />I reviewed your write-up last week, but failed_ t~o get back to you. <br /> <br />When you refer to "typical" for May and early June, what are you <br />really refering to. I would just omit that sentence, as it doesn't <br />say much, and I'm not really SUrE! it really wa.s typical. There were <br />some fairl v Generous rains in NE Colorado in _~~ate May, and -m~~h m(J"ri_ <br />May precip. than average ln~ much of W. --Cci1.or-a<;!Q. June was wetter <br />than average in many areas, but was typical in terms of having much <br />of the precip fall in the first 2 weeks of June, and having late ,June <br />be dry. I believe there were 2 episodes of heavy localized precip <br />producing some amount of locala flooding in the first week of June <br />mostly in NE Colorado. I recall June 2 as a possible additional <br />date, although I have not looked it up. <br /> <br />Actually, the change from dry to wet in late lJuly was not exactly <br />"abrupt". There was a gradual moistening of the atmosphere beginning <br />in mid July as the humid tropical air advanced northward. It was <br />then enhanced sharply with the influx of low-level moisture July <br />27-28 when the cold front and high pressure area over the northern <br />plains pushed moisture from the plains westward into E. Colorado. It <br />turns out that a high pressure area nartr: of Colorado i.s often a <br />necessary condition for heavy summer rains in E. Colorado. <br /> <br />> Trailed off by the end of Sept., not the month of Sept.. <br />> <br />> Dont't forget the extreme rainfall conditions that caused the Elk <br />> and Yampa Rivers to return to near flood sta~Je in NW Colorado Sept <br />> 18-21. While not associated with significant: damage or a disaster <br />> declaration, rainfall totals in NW Colorado of 4-8" for a 4-day <br />> period make this one of the heaviest rainfal=~ events in recorded <br />> history for that area of the Sta.te (Meeker to Steamboat) . <br />> <br />> Write up should also include something about LTuly 29th ',,,,hen the <br />> monstrous Pawnee Creek storm developed. Conditions were similar to <br />> July 28, but the stationary front may have quit being stationary <br />> against the Front Range foothills and may have been moving eastward <br />> a bit. I have not studied this in detail, but I should. 'rhEm the <br />> next week continued to produce locally heavy rains else'tJhere in :r:. <br />> Colorado. Some description of the weather pattern contributi.ng to <br />> the continued heavy rain should be added. <br />> <br />> Nolan <br />> <br /> <br />Markus Ritsch <br /> <br />__ 1 n <br /> <br />Ncn, 13 Apr 199f1 08:29:02 <br />