Alert archive / Iowa / Tornado Warnings in 2023
Tornado Warning 3, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 12, 2023, 8:16 PM CDT for Plymouth County, Woodbury County, Iowa. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 12, 2023, 8:16 PM CDT (01:16 UTC)
- Expired
- May 12, 2023, 8:45 PM CDT
- In force
- 29 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Plymouth County, IA, Woodbury County, IA
The radar
The Sioux Falls radar (KFSD), 125 km from the middle of the area, began a volume at 01:15 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 12, 1:09 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.3 hours before the alert went out and 130 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
- 1363 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1536 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 331 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 8.4
The text
As transmitted.
114
WFUS53 KFSD 130116
TORFSD
IAC149-193-130145-
/O.NEW.KFSD.TO.W.0003.230513T0116Z-230513T0145Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
816 PM CDT Fri May 12 2023
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
Northwestern Woodbury County in west central Iowa...
Southwestern Plymouth County in northwestern Iowa...
* Until 845 PM CDT.
* At 816 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Sergeant Bluff, or near Sioux City, moving north
at 25 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...
Sioux City around 820 PM CDT.
Hinton around 840 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 4244 9639 4247 9638 4249 9640 4249 9642
4263 9651 4265 9614 4242 9625 4241 9637
TIME...MOT...LOC 0116Z 175DEG 23KT 4246 9631
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
SST2 follow-up statements
677
WWUS53 KFSD 130131 RRA
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
831 PM CDT Fri May 12 2023
IAC149-193-130145-
/O.CON.KFSD.TO.W.0003.000000T0000Z-230513T0145Z/
Woodbury IA-Plymouth IA-
831 PM CDT Fri May 12 2023
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
NORTHWESTERN WOODBURY AND SOUTH CENTRAL PLYMOUTH COUNTIES...
At 831 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Hinton, or near Sioux City, moving north at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Hinton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4251 9635 4263 9645 4265 9614 4251 9624
TIME...MOT...LOC 0131Z 175DEG 23KT 4256 9632
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
SST798
WWUS53 KFSD 130141
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
841 PM CDT Fri May 12 2023
IAC149-193-130150-
/O.EXP.KFSD.TO.W.0003.000000T0000Z-230513T0145Z/
Woodbury IA-Plymouth IA-
841 PM CDT Fri May 12 2023
...THE TORNADO WARNING FOR NORTHWESTERN WOODBURY AND SOUTH CENTRAL
PLYMOUTH COUNTIES WILL EXPIRE AT 845 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
A Tornado Watch remains in effect until 900 PM CDT for northwestern
and west central Iowa.
Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Plymouth and Woodbbury County!
LAT...LON 4251 9635 4263 9645 4265 9614 4251 9624
TIME...MOT...LOC 0140Z 175DEG 23KT 4261 9633
$$
SSTThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 7:27 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 33 min |
| May 12, 7:46 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 44 min |
| May 12, 7:50 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 40 min |
| May 12, 7:55 PM CDT | Tornado Warning | FSD | Woodbury | 35 min |
| May 12, 8:17 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 28 min |
| May 12, 8:27 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 48 min |
| May 13, 11:02 AM CDT | River Flood Warning | FSD | Dickinson | 7 days |
| May 13, 1:48 PM CDT | Tornado Warning | FSD | Buena Vista | 27 min |
| May 13, 4:25 PM CDT | Tornado Warning | FSD | Buena Vista | 35 min |
| May 13, 4:36 PM CDT | Tornado Warning | FSD | Buena Vista | 24 min |
Nearby
Tornado Warnings in Iowa, 2023Every tornado warning in 2023Tornadoes in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.