The major winter storm will continue to impact the Northeast U.S. today with heavy snow as it shifts away from the East Coast. Frigid temperatures will impact the eastern two-thirds of the U.S. this week, and numerous record lows are forecast. Sub-zero lows are expected nearly every morning from the Northern Plains through the Ohio Valley and into the Northeast. Read More >
Event Overview
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Cold core low moved over the area, dragging along a weak and slow moving surface low pressure. While weak, sufficient low level and upper forcing aided in developing strong to severe storms. While instability was more than sufficient, the shear was lacking, but was enough to help develop a few supercell thunderstorms. Due to the weak forcing overall and the slow moving nature of the storms, some storms anchored over locations for an extended period of time, resulting in Flash Flooding. Some repeated storms over the same area also led to similar results. Severe weather reports were mostly in the form of hail, as these storms produced hail very efficiently. Some hail reaching 1.5", with some isolated reports of damaging winds.
This event not only impacted the area on 8/19, but due to little movement of the system as a whole, repeated events were seen the following day, on 8/20. Storm action generally hovered over counties along and east of the Mississippi River on the second day. 8/20 was filled with many mini supercells, where many led to funnel clouds. Along with the funnel clouds, some reports of brief tornadoes were received.
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 Surface Map on August 20th |
Tornado Information
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1.0 NW Scotch Grove, IA
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2.0 SSE Mannon, IL
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1.0 NNE Aledo, IL
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Storm Reports
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PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE QUAD CITIES IA IL 515 AM CDT SAT AUG 20 2022 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0746 PM Heavy Rain 3 N Muscatine 41.46N 91.07W 08/19/2022 U0.00 inch Muscatine IA Amateur Radio Delayed report. Water 3-4 inches deep across Tipton Road. 0518 PM Hail 1 ESE Vinton 42.16N 92.01W 08/19/2022 E0.25 inch Benton IA Public 0724 PM Hail Lanark 42.10N 89.83W 08/19/2022 E0.25 inch Carroll IL Trained Spotter Pea sized hail occurring for the past 5 minutes. 0820 PM Hail 1 SSW Muscatine Municip 41.35N 91.16W 08/19/2022 E0.25 inch Muscatine IA Trained Spotter Delayed report. Lasted 10 minutes. 0902 PM Hail Monticello 42.24N 91.19W 08/19/2022 E0.25 inch Jones IA Public Occurring right now with heavy winds. 0904 PM Hail 3 SSW Center Junction 42.08N 91.11W 08/19/2022 E0.25 inch Jones IA Trained Spotter Delayed report. Pea sized hail for a couple of minutes with heavy rain and estimated 40 mph wind gusts. 0623 PM Hail 2 WNW Letts 41.34N 91.27W 08/19/2022 E0.50 inch Muscatine IA Public Report from mPING: Half-inch (0.50 in.). 0855 PM Hail 2 N Monticello 42.26N 91.19W 08/19/2022 E0.50 inch Jones IA Trained Spotter 0741 PM Hail 2 WSW Freeport 42.28N 89.67W 08/19/2022 E0.70 inch Stephenson IL Public Occurring right now. 0841 PM Hail 1 ESE Anamosa 42.10N 91.27W 08/19/2022 E0.70 inch Jones IA Public Delayed report via social media and time estimated from radar. Pea to dime sized hail. 0818 PM Hail 3 W Penrose 41.89N 89.73W 08/19/2022 E0.75 inch Whiteside IL Public Delayed report from social media and time estimated from radar. Pea to penny hail covered the ground. 0736 PM Hail Lanark 42.10N 89.83W 08/19/2022 E0.88 inch Carroll IL Public Occurring right now. 0503 PM Hail 3W Vinton 42.22N 91.88W 08/19/2022 E1.00 inch Benton IA Trained Spotter Corrects previous hail report from Urbana. Delayed report. 0707 PM Hail 2 SSW Muscatine Municip 41.35N 91.16W 08/19/2022 E1.00 inch Muscatine IA Public Report from mPING: Quarter (1.00 in.). 0724 PM Hail Conesville 41.38N 91.35W 08/19/2022 E1.00 inch Muscatine IA Fire Dept/Rescue Via amatuer radio. Occurring right now. 0733 PM Hail 2 N Pekin 41.19N 92.17W 08/19/2022 E1.00 inch Keokuk IA Trained Spotter Hail falling the past 10 minutes with most stones pea to nickel size. 0703 PM Hail Conesville 41.38N 91.35W 08/19/2022 E1.50 inch Muscatine IA Amateur Radio Reported relayed be ARES from fire chief. Time shortly after 7PM. 0922 PM Heavy Rain 1 SSW Muscatine Municip 41.35N 91.16W 08/19/2022 M1.50 inch Muscatine IA Trained Spotter Occurred over a 2 hour period. 1051 PM Heavy Rain 1 NNW Mount Carroll 42.11N 89.98W 08/19/2022 M2.25 inch Carroll IL Trained Spotter Occurred 1012 to 1045 PM. 0845 PM Tstm Wnd Gst Morley 42.01N 91.24W 08/19/2022 E65 MPH Jones IA Fire Dept/Rescue Wind gust estimated by Morley Fire Chief. 0700 PM Tstm Wnd Dmg 2 N Conesville 41.40N 91.35W 08/19/2022 Muscatine IA Law Enforcement Delayed report Via amateur radio. Trees down blocking the road on the north side of Conesville. 0846 PM Tstm Wnd Dmg Muscatine 41.42N 91.07W 08/19/2022 Muscatine IA Law Enforcement Tree down on fletcher. Time estimated from radar. 0905 PM Flash Flood Conesville 41.38N 91.35W 08/19/2022 Muscatine IA Public Several yards and alleyways with water up to a foot deep on the south side of Conesville.
0425 PM FUNNEL CLOUD LISBON 41.92N 91.39W
08/20/2022 LINN IA FIRE DEPT/RESCUE
FUNNEL CLOUD SIGHTED NEAR LISBON.
0315 PM FUNNEL CLOUD 4 S ANNAWAN 41.34N 89.90W
08/20/2022 HENRY IL TRAINED SPOTTER
BRIEF FUNNEL CLOUD OBSERVED OFF TO THE SOUTH
OF THIS LOCATION.
0250 PM FUNNEL CLOUD 2 W STANWOOD 41.89N 91.19W
08/20/2022 CEDAR IA LAW ENFORCEMENT
FUNNEL CLOUD THIRD OF WAY DOWN FROM CLOUD
BASE THEN RETREATED.
0245 PM HAIL 3 WSW MC NABB 41.16N 89.26W
08/20/2022 E1.00 INCH PUTNAM IL TRAINED SPOTTER
REPORT OF ESTIMATED PENNY TO QUARTER SIZE
HAIL.
0205 PM TORNADO 3 NW VIOLA 41.24N 90.69W
08/20/2022 MERCER IL TRAINED SPOTTER
TRAINED SPOTTER REPORTED MULTI VORTEX
TORNADO IN CORN FIELD KICKING UP SOME
DEBRIS. STARTED TO BECOME RAIN WRAPPED AGAIN
AT END OF REPORT.
0155 PM TORNADO 2 N ALEDO 41.22N 90.74W
08/20/2022 MERCER IL STORM CHASER
STORM CHASERS REPORTED A BRIEF TOUCHDOWN
NEAR ALEDO, BUT QUICKLY GOT RAIN WRAPPED. NO
DAMAGE REPORTED AT THIS TIME.
0117 PM FUNNEL CLOUD 3 SSE MANNON 41.20N 90.93W
08/20/2022 MERCER IL TRAINED SPOTTER
TRAINED SPOTTER REPORTS A FUNNEL CLOUD,
WHERE PHOTOS SHOW A POTENTIAL BRIEF
TOUCHDOWN. HAS SINCE LIFTED. NO DAMAGE
REPORTS AT THIS TIME.
1220 PM TSTM WND DMG 1 NNW SCOTCH GROVE 42.19N 91.11W
08/20/2022 JONES IA EMERGENCY MNGR
EM RELAYED POSSIBLE TORNADO TOUCHDOWN,
DAMAGE TO CROPS. WILL INVESTIGATE FURTHER.
1205 PM FUNNEL CLOUD 2 NE CENTER JUNCTION 42.14N 91.06W
08/20/2022 JONES IA EMERGENCY MNGR
FUNNEL CLOUD REPORTED VERY CLOSE TO THE
GROUND. RELAYED BY LOCAL EM.
Photos & Video
Header
Discussions / Environmental Information
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| Figure 1: 12z 08/19 DVN Sounding | Figure 2: 00z 08/20 DVN Sounding | Figure 3: SPC Outlook 8/19 |
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| Figure 4: SPC Severe Thunderstorm Watch - 8/19 | Figure 5: SPC Tornado Threat - 8/19 | Figure 6: SPC Damaging Wind Threat - 8/19 |
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| Figure 7: SPC Hail Threat - 8/19 | Figure 8: 12z 08/20 DVN Sounding | Figure 9: 8/20 Mesoscale Discussion |
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| Figure 10: SPC Outlook - 8/20 | Figure 11: SPC Tornado Threat - 8/20 | Figure 12: SPC Damaging Wind Threat - 8/20 |
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