Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 99, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 26, 2021, 2:16 PM CDT for Appanoose County, Davis County, Wapello County, Iowa. It was in force for 44 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
- Aug 26, 2021, 2:16 PM CDT (19:16 UTC)
- Expired
- Aug 26, 2021, 3:00 PM CDT
- In force
- 44 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Appanoose County, IA, Davis County, IA, Wapello County, IA
The radar
The Des Moines radar (KDMX), 149 km from the middle of the area, began a volume at 19:15 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 nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.3 hours before the alert went out and 178 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
- 458 J/kg
- Mixed-layer CIN
- -249 J/kg
- Mixed-layer LCL
- 817 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- -15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
615
WUUS53 KDMX 261916
SVRDMX
IAC007-051-179-262000-
/O.NEW.KDMX.SV.W.0099.210826T1916Z-210826T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
216 PM CDT Thu Aug 26 2021
The National Weather Service in Des Moines has issued a
* Severe Thunderstorm Warning for...
Davis County in southeastern Iowa...
Southeastern Wapello County in southeastern Iowa...
Southeastern Appanoose County in south central Iowa...
* Until 300 PM CDT.
* At 216 PM CDT, severe thunderstorms were located along a line
extending from 6 miles west of Batavia to 6 miles north of
Lancaster, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* These severe thunderstorms will remain over mainly rural areas of
Davis, southeastern Wapello and southeastern Appanoose Counties,
including the following locations... Eldon, Agency, Floris,
Pulaski, Drakesville, Bloomfield Municipal Airport, Moulton and
Lake Wapello State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4104 9236 4102 9218 4060 9218 4059 9279
TIME...MOT...LOC 1916Z 285DEG 19KT 4097 9228 4062 9257
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Donavon3 follow-up statements
628
WWUS53 KDMX 261933
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
233 PM CDT Thu Aug 26 2021
IAC007-051-179-262000-
/O.CON.KDMX.SV.W.0099.000000T0000Z-210826T2000Z/
Davis IA-Wapello IA-Appanoose IA-
233 PM CDT Thu Aug 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR DAVIS...SOUTHEASTERN WAPELLO AND SOUTHEASTERN APPANOOSE
COUNTIES...
At 233 PM CDT, severe thunderstorms were located along a line
extending from near Batavia to 6 miles northeast of Lancaster, moving
east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Bloomfield, Eldon, Agency, Pulaski, Drakesville, Floris and
Bloomfield Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4102 9218 4060 9218 4059 9270 4104 9232
TIME...MOT...LOC 1933Z 285DEG 19KT 4095 9218 4060 9247
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Donavon112
WWUS53 KDMX 261947
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
247 PM CDT Thu Aug 26 2021
IAC007-261957-
/O.CAN.KDMX.SV.W.0099.000000T0000Z-210826T2000Z/
Appanoose IA-
247 PM CDT Thu Aug 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN APPANOOSE COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 4100 9218 4060 9218 4059 9263
TIME...MOT...LOC 1947Z 286DEG 16KT 4093 9210 4058 9239
$$
IAC051-179-262000-
/O.CON.KDMX.SV.W.0099.000000T0000Z-210826T2000Z/
Davis IA-Wapello IA-
247 PM CDT Thu Aug 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR DAVIS AND SOUTHEASTERN WAPELLO COUNTIES...
At 247 PM CDT, severe thunderstorms were located along a line
extending from near Libertyville to 6 miles north of Downing, moving
east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Bloomfield, Eldon, Pulaski, Floris and Bloomfield Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4100 9218 4060 9218 4059 9263
TIME...MOT...LOC 1947Z 286DEG 16KT 4093 9210 4058 9239
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Donavon766
WWUS53 KDMX 262000
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
300 PM CDT Thu Aug 26 2021
IAC051-179-262010-
/O.EXP.KDMX.SV.W.0099.000000T0000Z-210826T2000Z/
Davis IA-Wapello IA-
300 PM CDT Thu Aug 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR DAVIS AND SOUTHEASTERN WAPELLO
COUNTIES HAS EXPIRED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been allowed to expire.
LAT...LON 4100 9218 4060 9218 4059 9263
TIME...MOT...LOC 2000Z 285DEG 19KT 4091 9202 4056 9231
$$
DonavonThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 3:30 AM CDT | Heat Advisory | DMX | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 16 more | 17 hr |
| Aug 26, 8:03 AM CDT | Special Weather Statement | DMX | Audubon, Calhoun, Carroll, Pocahontas, Sac | 42 min |
| Aug 26, 8:18 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Greene, Sac | 42 min |
| Aug 26, 8:55 AM CDT | Special Weather Statement | DMX | Adair, Audubon, Dallas, Guthrie | 65 min |
| Aug 26, 9:18 AM CDT | Special Weather Statement | DMX | Boone, Hamilton, Webster | 57 min |
| Aug 26, 10:02 AM CDT | Special Weather Statement | DMX | Dallas, Jasper, Madison, Polk, Warren | 43 min |
| Aug 26, 12:29 PM CDT | Special Weather Statement | DMX | Boone, Story | 46 min |
| Aug 26, 1:46 PM CDT | Special Weather Statement | DMX | Davis, Wapello | 44 min |
| Aug 26, 3:03 PM CDT | Flood Watch | DMX | Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo, Emmet and 13 more | 16 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 2021Every severe thunderstorm warning 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.