Overview
During the afternoon of August 8th, 2023, a strong thunderstorm had formed in northeastern Washington county in Colorado. By 4:57pm MDT the thunderstorm had become a supercell and was producing a tornado just a mile and a half south of Highway 34 and a mile west of the Washington/Yuma county lines. The tornado proceeded to move generally southeast while looping in on itself a few times. At the end of its lifecycle, the tornado would try to loop on itself one more time causing it to change its track to move north toward the town of Yuma and increase its wind speed. The tornado would proceed to veer southwest just before town and dissipate around 5:25 pm MDT. The supercell storm would then proceed to move south/southeast across the county producing a few more tornadoes and a Colorado state record hail stone of 5.25 inches on Highway 36 between Kirk and Idalia. A final brief tornado was produced a few miles south of Kanorado.
Tornadoes:
Tornado - SW of Yuma
Track Map |
Tornado - Yuma Multivortex Tornado
Track Map |
Tornado - CR 23 to 21 Tornado
Track Map |
Tornado - East of Abarr Tornado
Track Map |
Tornado - County Road J Tornado
Track Map |
Tornado - County Road 8 Tornado
Track Map |
Tornado - Southern Yuma Wildlife Area Tornado
Track Map |
Tornado - South of Kanorado Tornado
Track Map |
The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
Hail
While the supercell was producing tornadoes, the supercell was also producing large to giant hail with numerous reports of 2+ inch hail stones. The supercell also produced a new Colorado state record hail stone with a diameter of 5.25 inches.
Picture of record hailstone between Kirk and Idalia. (Photo By: Dan Fitts) |
Record hail stone being measured (some melting had occurred). (Photo By: NWS Goodland) |
A variety of hailstones just east of Yuma, Colorado. (Photo By: Lynda Harper) |
Giant hail just southeast of Yuma. (Photo By: Lila Hahn) |
Photos & Video
Pictures of the Yuma Tornado damage.
Overturned irrigation sprinklers. (NWS Survey) |
Power poles being replaced. (NWS survey) |
Damaged building. (NWS Survey) |
Damage building. (NWS Survey) |
Roof torn off building. (NWS Survey) |
Damaged shed. (NWS Survey) |
Outside of damaged shed. (NWS Survey) |
Machine shed collapsed. (NWS Survey) |
Radar
Header
Radar Loop (Coming Soon) | Reflectivity and Velocity at start of Yuma Tornado | Reflectivity and Velocity at end of Yuma Tornado | Reflectivity and Velocity when the record hail stone fell. |
Storm Reports
Preliminary Local Storm Report...Summary National Weather Service Goodland KS 315 AM MDT Wed Aug 9 2023 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 1025 PM Hail 12 NNE Aroya 39.02N 103.08W 08/08/2023 E2.50 inch Cheyenne CO Broadcast Media Baseball size hail broke numerous double paned windows in a home in extreme northwest Cheyenne County. A few miles away, quarter to golf ball size hail accumulated to a depth of 6 inches. 0921 PM Tornado 3 SSE Kanorado 39.29N 102.01W 08/08/2023 Sherman KS Official NWS Obs Tornado debris signature (TDS) observed via KGLD 0.5 and 0.9 degree tilts at 0321 UTC. Correlation Coefficient dropout to 0.60-0.75 coincident with velocity couplet and reflectivity values ranging from 40-50 dBZ. Signature was only present for 1 volume scan. 0921 PM Tornado 3 SSE Kanorado 39.29N 102.01W 08/08/2023 Sherman KS Storm Chaser Possible tornado damage to an abandoned structure along with downed powerlines east of County Rd 3 on County Rd 61. Timing estimated via radar. 0920 PM Hail 3 E Peconic 39.33N 102.10W 08/08/2023 M1.00 inch Kit Carson CO Public Hail observed on I-70 at MM 447. 0920 PM Hail 3 E Peconic 39.33N 102.10W 08/08/2023 M1.00 inch Kit Carson CO Trained Spotter Hail observed at MM 447 on I-70. 0920 PM Hail 3 E Peconic 39.33N 102.10W 08/08/2023 M1.00 inch Kit Carson CO Public Hail observed at MM 447 on I-70. 0727 PM Tornado 8 SSW Idalia 39.60N 102.37W 08/08/2023 Yuma CO Public Chaser reported ongoing stovepipe tornado. Chaser was located 21 miles NW of Burlington. Location of report based on radar. 0725 PM Tornado 8 SW Idalia 39.61N 102.40W 08/08/2023 Yuma CO Storm Chaser Partially condensed cone tornado now rain wrapped. Location estimated via radar. Chaser was 11 miles SW of Idalia. 0722 PM Hail 8 ENE Kirk 39.66N 102.45W 08/08/2023 M5.00 inch Yuma CO Storm Chaser Corrects previous hail report from 8 WSW Idalia. Hail measured at 5.25 inches fell on Hwy 36. Time estimated. New LSR created with exact location stone was picked up. 0716 PM Hail Idalia 39.70N 102.29W 08/08/2023 E1.50 inch Yuma CO Public Report from mPING: Ping Pong Ball (1.50 in.). 0713 PM Hail Idalia 39.70N 102.29W 08/08/2023 E1.25 inch Yuma CO Public Report from mPING: Half Dollar (1.25 in.). 0711 PM Tornado 7 NE Kirk 39.69N 102.51W 08/08/2023 Yuma CO Storm Chaser Delayed report via social media. Brief condensed and uncondensed circulations roughly 7 miles NE of Kirk from 7 to 7:15 PM MDT. Image taken at County Rd 3 and R. Location estimated for tornado. 0710 PM Tornado 8 W Idalia 39.68N 102.45W 08/08/2023 Yuma CO Storm Chaser Chaser sent video of ongoing tornado that was dissipated as of 7:13 PM. Video observed from Roads T and 8. Time and location estimated via radar. 0709 PM Hail Idalia 39.70N 102.29W 08/08/2023 E1.00 inch Yuma CO Public Report from mPING: Quarter (1.00 in.). 0707 PM Hail Idalia 39.70N 102.29W 08/08/2023 E0.75 inch Yuma CO Public Report from mPING: Dime (0.75 in.). 0630 PM Tornado 5 SE Abarr 39.80N 102.65W 08/08/2023 Yuma CO Public Ongoing tornado reported. Location roughly 10 miles NW of Kirk. Location estimated via radar and report. 0630 PM Hail 6 WSW Heartstrong 39.93N 102.68W 08/08/2023 E4.00 inch Yuma CO Storm Chaser Storm chaser reported 3.5 inch to 4 inch hail near the intersection of Highway 59 and County Road 25 at approximately 6:30 pm MDT. 0625 PM Tornado 3 E Abarr 39.85N 102.66W 08/08/2023 Yuma CO Storm Chaser Storm chasers were 7 miles north of Joes looking to the northwest. They commented they saw rope tornado for about a minute and a half, emerging out of rain shaft. Position estimated by radar. 0620 PM Hail 6 N Abarr 39.94N 102.71W 08/08/2023 E2.50 inch Yuma CO Public Report from mPING: Tennis Ball (2.50 in.). 0619 PM Tstm Wnd Gst 1 ESE Abarr 39.85N 102.70W 08/08/2023 E60 MPH Yuma CO Trained Spotter 0619 PM Tornado 5 SW Heartstrong 39.89N 102.63W 08/08/2023 Yuma CO Storm Chaser Tornado just touched down via Chaser live feed. Location estimated via radar. 0617 PM Hail 7 N Abarr 39.95N 102.71W 08/08/2023 E1.50 inch Yuma CO Public Report from mPING: Ping Pong Ball (1.50 in.). 0606 PM Tornado 2 NNE Abarr 39.87N 102.71W 08/08/2023 Yuma CO Storm Chaser Brief tornado lasted about 2 minutes (6:08PM) roughly 2-3 miles NW of County Rds L and and 18 intersection. 0559 PM Hail 7 S Yuma 40.03N 102.72W 08/08/2023 E1.25 inch Yuma CO Public Report from mPING: Half Dollar (1.25 in.). 0545 PM Hail 6 SSW Yuma 40.05N 102.77W 08/08/2023 E1.75 inch Yuma CO Trained Spotter Up to golf ball hail observed. Power was out at the residence. 0534 PM Hail 6 NNW Heartstrong 40.04N 102.61W 08/08/2023 E3.00 inch Yuma CO Public Delayed report via social media with photo of hailstones. Time estimated. 0530 PM Tornado 7 NNW Heartstrong 40.05N 102.62W 08/08/2023 Yuma CO Storm Chaser Delayed report via social media. Multi-vortex tornado reported roughly 7-8 miles southeast of Yuma. Location approximate based on radar. Tornado has lifted prior to 5:51 PM MDT. 0518 PM Hail 4 ESE Yuma 40.10N 102.66W 08/08/2023 E1.75 inch Yuma CO Public Hail was ongoing at the location. 0516 PM Hail 4 SE Yuma 40.08N 102.66W 08/08/2023 E1.00 inch Yuma CO Public Report from mPING: Quarter (1.00 in.). 0515 PM Hail 7 N Abarr 39.95N 102.72W 08/08/2023 E2.75 inch Yuma CO Public Corrects previous hail report from 7 N Abarr. Delayed report via social media with picture. Time estimated. 0513 PM Tornado 5 S Yuma 40.05N 102.72W 08/08/2023 Yuma CO Storm Chaser 5 power poles snapped along Hwy 59. Time estimated. 0508 PM Hail 3 W Yuma 40.12N 102.78W 08/08/2023 E4.00 inch Yuma CO Storm Chaser 0502 PM Tornado 2 SW Yuma 40.10N 102.76W 08/08/2023 Yuma CO Fire Dept/Rescue Tornado on the ground estimated 3 miles west of the airport. Location estimated. 0500 PM Hail 4 NE Yuma 40.16N 102.67W 08/08/2023 E1.75 inch Yuma CO Public Delayed report via social media.
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