Alert archive / Iowa / Tornado Warnings in 2024
Tornado Warning 9, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Apr 16, 2024, 2:59 PM CDT for Lyon County, Osceola County, Sioux County, Iowa. It was in force for 31 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 16, 2024, 2:59 PM CDT (19:59 UTC)
- Expired
- Apr 16, 2024, 3:30 PM CDT
- In force
- 31 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Lyon County, IA, Osceola County, IA, Sioux County, IA
The radar
The Sioux Falls radar (KFSD), 67 km from the middle of the area, began a volume at 20:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 16, 2:59 PM CDT | TSTM WND DMG | 3 Wnw Matlock, IA | A couple buildings had their roofs blown off. |
| Apr 16, 3:01 PM CDT | TSTM WND DMG | 4 Wnw Matlock, IA | Damage to outbuilding. Time estimated via radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 16, 12:23 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 8.0 hours before the alert went out and 223 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 852 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1959 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.0
The text
As transmitted.
720
WFUS53 KFSD 161959
TORFSD
IAC119-143-167-162030-
/O.NEW.KFSD.TO.W.0009.240416T1959Z-240416T2030Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
259 PM CDT Tue Apr 16 2024
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
Eastern Lyon County in northwestern Iowa...
Western Osceola County in northwestern Iowa...
Northeastern Sioux County in northwestern Iowa...
* Until 330 PM CDT.
* At 258 PM CDT, a severe thunderstorm capable of producing a tornado
was located near George, or 11 miles southeast of Rock Rapids,
moving north at 30 mph. There are multiple circulations in this
warning, one northeast of Doon and the other northwest of Boyden.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Rock Rapids and George around 305 PM CDT.
Little Rock around 315 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4314 9592 4323 9622 4350 9622 4350 9570
TIME...MOT...LOC 1958Z 198DEG 24KT 4328 9607
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
SG2 follow-up statements
631
WWUS53 KFSD 162014
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
314 PM CDT Tue Apr 16 2024
IAC167-162023-
/O.CAN.KFSD.TO.W.0009.000000T0000Z-240416T2030Z/
Sioux IA-
314 PM CDT Tue Apr 16 2024
...THE TORNADO WARNING FOR NORTHEASTERN SIOUX COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 700 PM CDT for northwestern
Iowa.
&&
LAT...LON 4329 9583 4333 9620 4350 9620 4350 9570
TIME...MOT...LOC 2013Z 192DEG 27KT 4342 9605
$$
IAC119-143-162030-
/O.CON.KFSD.TO.W.0009.000000T0000Z-240416T2030Z/
Lyon IA-Osceola IA-
314 PM CDT Tue Apr 16 2024
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
NORTHEASTERN LYON AND NORTHWESTERN OSCEOLA COUNTIES...
At 313 PM CDT, a severe thunderstorm capable of producing a tornado
was located near George, or near Rock Rapids, moving north at 30 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Little Rock around 320 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4329 9583 4333 9620 4350 9620 4350 9570
TIME...MOT...LOC 2013Z 192DEG 27KT 4342 9605
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
SG781 WWUS53 KFSD 162030 SVSFSD Severe Weather Statement National Weather Service Sioux Falls SD 330 PM CDT Tue Apr 16 2024 IAC119-143-162040- /O.EXP.KFSD.TO.W.0009.000000T0000Z-240416T2030Z/ Lyon IA-Osceola IA- 330 PM CDT Tue Apr 16 2024 ...THE TORNADO WARNING FOR NORTHEASTERN LYON AND NORTHWESTERN OSCEOLA COUNTIES HAS EXPIRED... The storm which prompted the warning has weakened below severe limits, and has exited the warned area. Therefore, the warning has been allowed to expire. A Tornado Watch remains in effect until 700 PM CDT for northwestern Iowa. && LAT...LON 4329 9583 4333 9620 4350 9620 4350 9570 TIME...MOT...LOC 2030Z 198DEG 24KT 4352 9601 $$ SG
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 2:56 AM CDT | Wind Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 16 hr |
| Apr 16, 1:36 PM CDT | Tornado Warning | FSD | Plymouth, Woodbury | 24 min |
| Apr 16, 1:46 PM CDT | Tornado Warning | FSD | Plymouth, Woodbury | 29 min |
| Apr 16, 1:58 PM CDT | Tornado Warning | FSD | Plymouth, Sioux | 32 min |
| Apr 16, 2:15 PM CDT | Tornado Warning | FSD | Plymouth, Sioux | 30 min |
| Apr 16, 2:22 PM CDT | Tornado Warning | FSD | Sioux | 23 min |
| Apr 16, 2:38 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 22 min |
| Apr 16, 2:49 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 11 min |
| Apr 16, 3:10 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 35 min |
| Apr 16, 4:07 PM CDT | Tornado Warning | FSD | Clay, Dickinson | 23 min |
Nearby
Tornado Warnings in Iowa, 2024Every tornado warning in 2024Tornadoes in 2024
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.