From: Sam Barricklow (k5kj@PULSE.NET): Subject: Bustola Saturday > The data looked better than the results. > > I opted to go east on I-20 instead of ENE on I-30 due to the higher CAPE > values along I-20 and due to a traffic jam on I-30 in eastern Dallas > County. > > The UOKNOR ADAP run at 16Z had a 4000 j/kg CAPE bullseye centered in > Kaufman County, one county east of Dallas. Helicity values were > indicated to be around 150, with values steadily increasing toward a > maximum in northern OK. Early towers were crisp and hard, but after the > initial storms went up and quickly moved northeast, most subsequent > convection was soft and had that soft fuzzy tropical look. > > Golf ball hail was reported near Paris and a 70 mph wind gust was > reported at Lake Tawokini. Brief falls of marble and smaller hail > occurred along the I-20 corridor with one inch diameter hail reported > just SE of Tyler. > > One of the reasons for weakening of the convection was evident in the > wind field. A scattered line of storms stretched SSE from the "Paris" > storm and lead the dryline storms farther south. ("Banding" features of > this type are often associated with meso lows or meso-cyclones. Did the > "Paris" hailer have a radar indicated meso?) The surface wind field was > better ahead of this line, with 20 to 30 mph gusts from the ESE and SE. > Behind this leading line and ahead of the dryline, the winds veared to > the south and SW at 10 to 15 mph. > > As the Paris storm moved into Oklahoma, a fairly good looking storm that > had formed near Corsicana came into view and moved northeast toward > Canton along or just ahead of the dryline. I had high hopes for this > storm at the time. It produced a strong anvil and hard towers, but > shortly after it crossed I-20 it collapsed and produced the high winds > at Lake Tawokini. The surface wind field in this area never recovered > from the Paris storm's influence. I suspect that the higher CAPE air > had been pushed eastward ahead of the leading line. > > It was an interesting but frustrating chase. Visibilities were better > than I had expected, although there was some ground fog just behind the > first line with an air temp of 74 degrees. RADAR updates were heard via > 444.825 MHz from NWSFO FTW and via the East Texas SKYWARN net on 147.32 > MHz. More info than expected was available. > > Sam Barricklow > http://www.stormchaser.net/k5kj/mineola.htm > Images of a similar, but more productive chase into East Texas a few > years ago.
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