Alert archive / Iowa / Tornado Warnings in 2021
Tornado Warning 29, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Dec 10, 2021, 6:26 PM CST for Des Moines County, Henry County, Louisa County, Iowa. It was in force for 20 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
- Dec 10, 2021, 6:26 PM CST (00:26 UTC)
- Expired
- Dec 10, 2021, 6:46 PM CST
- In force
- 20 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Des Moines County, IA, Henry County, IA, Louisa County, IA
The radar
The Quad Cities radar (KDVN), 68 km from the middle of the area, began a volume at 00:25 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
Davenport, (KDVN), launched 00:00Z, 0.4 hours before the alert went out and 73 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
- 450 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- 342 m²/s²
- 0-3 km storm-relative helicity
- 311 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
783
WFUS53 KDVN 110026
TORDVN
IAC057-087-115-110115-
/O.NEW.KDVN.TO.W.0029.211211T0026Z-211211T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
626 PM CST Fri Dec 10 2021
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
East central Henry County in southeastern Iowa...
Northern Des Moines County in southeastern Iowa...
Southeastern Louisa County in southeastern Iowa...
* Until 715 PM CST.
* At 626 PM CST, a severe thunderstorm capable of producing a tornado
was located over Mount Union, or 11 miles northeast of Mount
Pleasant, moving northeast at 50 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...
Morning Sun around 635 PM CST.
Wapello and Amber around 640 PM CST.
Oakville and Toolesboro around 645 PM CST.
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 4110 9141 4128 9111 4128 9110 4125 9111
4124 9111 4121 9107 4117 9104 4116 9103
4116 9100 4108 9095 4104 9094 4100 9140
TIME...MOT...LOC 0026Z 236DEG 45KT 4104 9135
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Gibbs3 follow-up statements
812
WWUS53 KDVN 110033
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
633 PM CST Fri Dec 10 2021
IAC057-087-110043-
/O.CAN.KDVN.TO.W.0029.000000T0000Z-211211T0115Z/
Henry IA-Des Moines IA-
633 PM CST Fri Dec 10 2021
...THE TORNADO WARNING FOR EAST CENTRAL HENRY AND NORTHERN DES MOINES
COUNTIES IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
LAT...LON 4128 9111 4128 9110 4124 9111 4121 9107
4117 9104 4116 9103 4116 9100 4107 9095
4107 9132 4114 9135
TIME...MOT...LOC 0033Z 235DEG 48KT 4111 9123
$$
IAC115-110115-
/O.CON.KDVN.TO.W.0029.000000T0000Z-211211T0115Z/
Louisa IA-
633 PM CST Fri Dec 10 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CST FOR
SOUTHEASTERN LOUISA COUNTY...
At 633 PM CST, a severe thunderstorm capable of producing a tornado
was located over Morning Sun, or near Wapello, moving northeast at 55
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...
Oakville and Amber around 640 PM CST.
Toolesboro around 645 PM CST.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4128 9111 4128 9110 4124 9111 4121 9107
4117 9104 4116 9103 4116 9100 4107 9095
4107 9132 4114 9135
TIME...MOT...LOC 0033Z 235DEG 48KT 4111 9123
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Gibbs934
WWUS53 KDVN 110041
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
641 PM CST Fri Dec 10 2021
IAC115-110115-
/O.CON.KDVN.TO.W.0029.000000T0000Z-211211T0115Z/
Louisa IA-
641 PM CST Fri Dec 10 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CST FOR
SOUTHEASTERN LOUISA COUNTY...
At 641 PM CST, a severe thunderstorm capable of producing a tornado
was located near Toolesboro, or near Wapello, moving northeast at 50
mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Amber around 645 PM CST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4128 9111 4128 9110 4124 9111 4121 9107
4117 9104 4116 9103 4116 9100 4107 9095
4107 9132 4115 9123 4120 9125
TIME...MOT...LOC 0041Z 236DEG 45KT 4117 9111
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Gibbs917
WWUS53 KDVN 110046
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
646 PM CST Fri Dec 10 2021
IAC115-110056-
/O.CAN.KDVN.TO.W.0029.000000T0000Z-211211T0115Z/
Louisa IA-
646 PM CST Fri Dec 10 2021
...THE TORNADO WARNING FOR SOUTHEASTERN LOUISA COUNTY IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Quad Cities.
LAT...LON 4128 9111 4128 9110 4124 9111 4121 9107
4117 9104 4116 9103 4116 9100 4107 9095
4107 9132 4115 9123 4120 9125
TIME...MOT...LOC 0045Z 236DEG 45KT 4121 9104
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 10, 6:52 PM CST | Special Weather Statement | DVN | Scott | 53 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.