Baum Posted August 10, 2020 NWS Des Moines @NWSDesMoines · 1m 11:50 AM CDT... 99 mph wind gust reported at Marshalltown Airport! #iawx Quote Share this post Link to post Share on other sites
mjwise Posted August 10, 2020 Just now, A-L-E-K said: the way that WAA wing came together The conditions in eastern Iowa in front of this thing are about as good as it gets. The WAA wing was ready to party. Quote Share this post Link to post Share on other sites
Chicago Storm Posted August 10, 2020 High risk worthy derecho in progress. 1 1 Quote Share this post Link to post Share on other sites
WeatherMonger Posted August 10, 2020 Happens every now and again, but I'm always impressed when the outflow/gust front prompts warnings ahead of it. People nit reading it probably confused at lack of a storm approaching yet under a warning. 1 Quote Share this post Link to post Share on other sites
janetjanet998 Posted August 10, 2020 SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1204 PM CDT MON AUG 10 2020 IAC099-123-125-127-157-171-101730- /O.CON.KDMX.SV.W.0151.000000T0000Z-200810T1730Z/ POWESHIEK IA-MARSHALL IA-MARION IA-TAMA IA-MAHASKA IA-JASPER IA- 1204 PM CDT MON AUG 10 2020 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CDT FOR POWESHIEK...EASTERN MARSHALL...NORTHEASTERN MARION...TAMA... MAHASKA AND EASTERN JASPER COUNTIES... AT 1203 PM CDT, SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR TRAER TO NEAR VICTOR TO 6 MILES WEST OF DELTA, MOVING EAST AT 60 MPH. THESE ARE VERY DANGEROUS STORMS. HAZARD...90 MPH WIND GUSTS AND QUARTER SIZE HAIL. SOME AREAS MAY HAVE WINDS IN EXCESS OF 100 MPH! 1 Quote Share this post Link to post Share on other sites
OceanStWx Posted August 10, 2020 11 minutes ago, Baum said: NWS Des Moines @NWSDesMoines · 1m 11:50 AM CDT... 99 mph wind gust reported at Marshalltown Airport! #iawx It looks like that gust was part of a mesovortex that formed a little north of town. Probably locally enhanced the wind, but looks like it has also set off a new descending RIJ that is now bowing the line out in the area between I-80 and Highway 30. 1 Quote Share this post Link to post Share on other sites
Hoosier Posted August 10, 2020 1 minute ago, janetjanet998 said: SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1204 PM CDT MON AUG 10 2020 IAC099-123-125-127-157-171-101730- /O.CON.KDMX.SV.W.0151.000000T0000Z-200810T1730Z/ POWESHIEK IA-MARSHALL IA-MARION IA-TAMA IA-MAHASKA IA-JASPER IA- 1204 PM CDT MON AUG 10 2020 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CDT FOR POWESHIEK...EASTERN MARSHALL...NORTHEASTERN MARION...TAMA... MAHASKA AND EASTERN JASPER COUNTIES... AT 1203 PM CDT, SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR TRAER TO NEAR VICTOR TO 6 MILES WEST OF DELTA, MOVING EAST AT 60 MPH. THESE ARE VERY DANGEROUS STORMS. HAZARD...90 MPH WIND GUSTS AND QUARTER SIZE HAIL. SOME AREAS MAY HAVE WINDS IN EXCESS OF 100 MPH! I remember the old school high end severe thunderstorm warnings where they would mention "siren activation is suggested" in times like this. Don't know if any offices still do that, but this is the perfect type of situation for it. 1 Quote Share this post Link to post Share on other sites
Chicago Storm Posted August 10, 2020 1 minute ago, Hoosier said: I remember the old school high end severe thunderstorm warnings where they would mention "siren activation is suggested" in times like this. Don't know if any offices still do that, but this is the perfect type of situation for it. And "hurricane force". 1 Quote Share this post Link to post Share on other sites
AppsRunner Posted August 10, 2020 Seems as if Tama county has had the worst winds so far, EM reporting up to 100mph gusts there. Just now, Hoosier said: I remember the old school high end severe thunderstorm warnings where they would mention "siren activation is suggested" in times like this. Don't know if any offices still do that, but this is the perfect type of situation for it. At least for DMX's CWA most of the larger cities (DSM/Ames) have siren activation for any warning with 70+ Quote Share this post Link to post Share on other sites
SchaumburgStormer Posted August 10, 2020 Cedar Rapids is lined up to get rocked 1 Quote Share this post Link to post Share on other sites
OceanStWx Posted August 10, 2020 4 minutes ago, Hoosier said: I remember the old school high end severe thunderstorm warnings where they would mention "siren activation is suggested" in times like this. Don't know if any offices still do that, but this is the perfect type of situation for it. Unless policy has changed the QCA has siren activation at 70+ and many surrounding towns had begun to adopt it. Quote Share this post Link to post Share on other sites
janetjanet998 Posted August 10, 2020 1 hour ago, cyclone77 said: Des Moines just officially gusted to 75mph at DSM. the VAD in the lower 3km on COD nexlab was interesting and still has 60 kts Quote Share this post Link to post Share on other sites
Indystorm Posted August 10, 2020 PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE DES MOINES IA 1208 PM CDT MON AUG 10 2020 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 1152 AM TSTM WND GST 2 WNW LE GRAND 42.02N 92.81W 08/10/2020 M106 MPH MARSHALL IA MESONET PERSONAL WEATHER STATION KIAMARSH15. 2 Quote Share this post Link to post Share on other sites
MUWX Posted August 10, 2020 The corn damage from this is going to be incredible. This could be an insanely costly storm for the upper Midwest. Quote Share this post Link to post Share on other sites
Chicago Storm Posted August 10, 2020 1151 AM TSTM WND DMG 2 S MARSHALLTOWN 42.01N 92.91W 08/10/2020 MARSHALL IA STORM CHASER SEVERAL LARGE SECTIONS OF ROOFS BLOWN OFF BUILDINGS ALONG OLD HIGHWAY 30 ON SOUTH PART OF MARSHALLTOWN. Quote Share this post Link to post Share on other sites
CheeselandSkies Posted August 10, 2020 Man, this is the kind of thing where I'm like "where the heck are these from May through July?" then here's one on what started out as a marginal risk day in August. 1 1 Quote Share this post Link to post Share on other sites
Calderon Posted August 10, 2020 Damn, Marshalltown can't catch a break these last 2 years. Quote Share this post Link to post Share on other sites
Indystorm Posted August 10, 2020 2 minutes ago, Calderon said: Damn, Marshalltown can't catch a break these last 2 years. Yeah, they had that tornado as well right downtown. Quote Share this post Link to post Share on other sites
hawkeye_wx Posted August 10, 2020 The wind just hit, limbs down. 1 1 Quote Share this post Link to post Share on other sites
janetjanet998 Posted August 10, 2020 1225 PM TSTM WND GST BLAIRSTOWN 41.91N 92.08W 08/10/2020 E90 MPH BENTON IA EMERGENCY MNGR WINDS IN EXCESS OF 90 MPH WITH MAJOR DAMAGE REPORTED IN TOWN. Quote Share this post Link to post Share on other sites
geddyweather Posted August 10, 2020 Quick mesoanalysis check: MUCAPE ballooning over 5000j/kg in IL with big time mid-level lapse rates, topping out at 8.5C/km in the area of Chicago metro. Maybe one of the best MCS environments we have been presented with all year? Quote Share this post Link to post Share on other sites
AppsRunner Posted August 10, 2020 Taken back in Luther, but this in that area of 110kt velocity northwest of DMX. Quote Share this post Link to post Share on other sites
OceanStWx Posted August 10, 2020 14 minutes ago, janetjanet998 said: 1225 PM TSTM WND GST BLAIRSTOWN 41.91N 92.08W 08/10/2020 E90 MPH BENTON IA EMERGENCY MNGR WINDS IN EXCESS OF 90 MPH WITH MAJOR DAMAGE REPORTED IN TOWN. They are one of the best counties at reporting storm damage too. Quote Share this post Link to post Share on other sites
Amped Posted August 10, 2020 Another MCS is forming to the north of the main one. There maybe a merger in N central IL. Quote Share this post Link to post Share on other sites
cyclone77 Posted August 10, 2020 Time lapse is rolling. Enjoying the final hour of electricity. Looks like a good shot at 70mph+ winds by 2pm. Very impressive and scary wind reports all along the I-80/highway 30 corridor. 5 Quote Share this post Link to post Share on other sites
SmokeEater Posted August 10, 2020 Best stations for live coverage once this thing gets into IL? Watching KGAN from Cedar Rapids now. Got crazy intense there. Sent from my SM-G973U using Tapatalk Quote Share this post Link to post Share on other sites
Chicago Storm Posted August 10, 2020 1258 PM TSTM WND DMG 4 ENE SHELLSBURG 42.12N 91.81W 08/10/2020 LINN IA EMERGENCY MNGR ESTIMATED GUSTS OVER 100 MPH WITH MULTIPLE CAMPERS BLOWN OVER, ALONG WITH THE SHELTER ROOF AT THE PARK BLOWN OFF. 1 Quote Share this post Link to post Share on other sites
AppsRunner Posted August 10, 2020 Local Storm Report by NWS DVN: 4 ENE Shellsburg [Linn Co, IA] emergency mngr reports TSTM WND DMG at 12:58 PM CDT -- estimated gusts over 100 mph with multiple campers blown over, along with the shelter roof at the park blown off. Quote Share this post Link to post Share on other sites
NEILwxbo Posted August 10, 2020 Has the potential to be one of the more widespread wind events N IL has seen in many years Quote Share this post Link to post Share on other sites
