Alert archive / Iowa / Tornado Warnings in 2021
Tornado Warning 7, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 10, 2021, 5:00 PM CDT for Dallas County, Iowa. It was in force for 30 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
- Jul 10, 2021, 5:00 PM CDT (22:00 UTC)
- Expired
- Jul 10, 2021, 5:30 PM CDT
- In force
- 30 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
County Dallas County, IA
The radar
The Des Moines radar (KDMX), 28 km from the middle of the area, began a volume at 22:03 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 nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.0 hours before the alert went out and 197 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 976 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
267
WFUS53 KDMX 102200
TORDMX
IAC049-102230-
/O.NEW.KDMX.TO.W.0007.210710T2200Z-210710T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
500 PM CDT Sat Jul 10 2021
The National Weather Service in Des Moines has issued a
* Tornado Warning for...
Central Dallas County in central Iowa...
* Until 530 PM CDT.
* At 500 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Adel, moving east 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...
Dallas Center around 505 PM CDT.
Waukee around 520 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 4157 9409 4173 9420 4182 9397 4160 9387
TIME...MOT...LOC 2200Z 253DEG 23KT 4163 9405
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
Hagenhoff2 follow-up statements
991
WWUS53 KDMX 102217
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
517 PM CDT Sat Jul 10 2021
IAC049-102230-
/O.CON.KDMX.TO.W.0007.000000T0000Z-210710T2230Z/
Dallas IA-
517 PM CDT Sat Jul 10 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR CENTRAL
DALLAS COUNTY...
At 515 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Dallas Center, or near Waukee, moving east at 25
mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
central Dallas County, including the following locations... Minburn.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4158 9404 4175 9416 4182 9397 4160 9387
TIME...MOT...LOC 2215Z 253DEG 23KT 4166 9392
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
Hagenhoff153
WWUS53 KDMX 102228
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
528 PM CDT Sat Jul 10 2021
IAC049-102237-
/O.EXP.KDMX.TO.W.0007.000000T0000Z-210710T2230Z/
Dallas IA-
528 PM CDT Sat Jul 10 2021
...THE TORNADO WARNING FOR CENTRAL DALLAS COUNTY WILL EXPIRE AT 530
PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado. Broad
rotation is still exhibited and will be monitored. Therefore, the
warning will be allowed to expire.
LAT...LON 4158 9404 4175 9416 4182 9397 4160 9387
TIME...MOT...LOC 2227Z 253DEG 23KT 4168 9384
$$
HagenhoffThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 9:16 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 44 min |
| Jul 9, 9:31 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Ringgold, Union | 15 min |
| Jul 9, 9:38 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 52 min |
| Jul 9, 10:21 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 39 min |
| Jul 9, 11:41 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 49 min |
| Jul 9, 11:56 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass | 49 min |
| Jul 10, 12:41 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Ringgold, Taylor, Union | 64 min |
| Jul 10, 2:49 PM CDT | Special Weather Statement | DMX | Carroll, Crawford, Sac | 56 min |
| Jul 10, 4:36 PM CDT | Tornado Warning | DMX | Dallas, Guthrie | 24 min |
Nearby
Tornado Warnings in Iowa, 2021Every tornado warning in 2021Tornadoes in 2021
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.