Josh Richardson
EF4
Anybody see the dewpoints surging northward through IA? Already hitting 78 and higher in some places and its only 11 am. LOL, nice 6500 Cape Values over me already here....definitely a muggy day out there.
A recent ob from the AWOS at Algona: 90/86 with a heat index of 126! Wow.
You can check obs over Iowa easily every hour at http://mesonet.agron.iastate.edu/data/mesonet.gif
Yea it is always a shame to see these big moisture, extreme CAPE events go to waste but the once in a blue moon time they do happen can lead to some violent events. A few include August 28, 1990 Plainfield, IL F5 Tornado, where the dews were in the low 80s and CAPE soared to 8000+ j/kg, July 18, 1996 the Wisconsin F5, and Iowa has also had their share but I can't remember the name. I guess as long as you can get enough CAPE (at least 6500 j/kg) shear doesn't matter much.
[FONT=lucida sans typewriter, lucida console, courier]2000 UTC METARS:
[FONT=lucida sans typewriter, lucida console, courier]CITY SKY/WX TMP DP RH WIND PRES REMARKS
ATLANTIC * SUNNY 95 81 63 SW9 29.87S HX 115
COUNCIL BLFS * N/A 95 82 66 S9 29.85F HX 119
CRESTON * SUNNY 95 79 59 S14 29.88R HX 112
HARLAN * MOSUNNY 91 75 59 S3 29.88F HX 102
LAMONI SUNNY 94 76 55 S12 29.87F HX 106
RED OAK * SUNNY 97 82 63 S10 29.85S HX 121
SHENANDOAH * N/A 97 86 71 SW8 29.86S HX 130 [/FONT]
The Shenandoah site is planted in the middle of a corn field. Its dewpoint always reads a few degrees too high.