Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 9, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 16, 2021, 10:23 PM CDT for 4 counties in Iowa. It was in force for 53 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
- Jun 16, 2021, 10:23 PM CDT (03:23 UTC)
- Expired
- Jun 16, 2021, 11:16 PM CDT
- In force
- 53 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Audubon County, IA, Carroll County, IA, Greene County, IA, Guthrie County, IA
The radar
The Des Moines radar (KDMX), 95 km from the middle of the area, began a volume at 03:23 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 |
|---|---|---|---|
| Jun 16, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.4 hours before the alert went out and 133 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
- 2997 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1946 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 435 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 27.9
The text
As transmitted.
581
WUUS53 KDMX 170323
SVRDMX
IAC009-027-073-077-170430-
/O.NEW.KDMX.SV.W.0009.210617T0323Z-210617T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
1023 PM CDT Wed Jun 16 2021
The National Weather Service in Des Moines has issued a
* Severe Thunderstorm Warning for...
Southwestern Greene County in west central Iowa...
Guthrie County in west central Iowa...
Audubon County in west central Iowa...
Southeastern Carroll County in west central Iowa...
* Until 1130 PM CDT.
* At 1023 PM CDT, a severe thunderstorm was located near Coon Rapids,
or 10 miles northeast of Audubon, moving southeast at 40 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.
* This severe thunderstorm will remain over mainly rural areas of
southwestern Greene, Guthrie, Audubon and southeastern Carroll
Counties, including the following locations... Exira, Gray,
Kimballton, Yale, Elk Horn, Casey, Menlo, Bayard, Dedham and
Brayton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4186 9509 4209 9448 4150 9424 4151 9504
4160 9504 4160 9509
TIME...MOT...LOC 0323Z 336DEG 33KT 4183 9480
HAIL...1.00IN
WIND...60MPH
$$
Small3 follow-up statements
393
WWUS53 KDMX 170344
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
1044 PM CDT Wed Jun 16 2021
IAC027-170353-
/O.CAN.KDMX.SV.W.0009.000000T0000Z-210617T0430Z/
Carroll IA-
1044 PM CDT Wed Jun 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARROLL COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
central, south central, southwestern and west central Iowa.
LAT...LON 4186 9509 4186 9463 4193 9463 4204 9446
4150 9424 4151 9504 4160 9504 4160 9509
TIME...MOT...LOC 0343Z 335DEG 34KT 4162 9466
$$
IAC009-073-077-170430-
/O.CON.KDMX.SV.W.0009.000000T0000Z-210617T0430Z/
Greene IA-Guthrie IA-Audubon IA-
1044 PM CDT Wed Jun 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR SOUTHWESTERN GREENE...GUTHRIE AND AUDUBON COUNTIES...
At 1043 PM CDT, a severe thunderstorm was located 9 miles southwest
of Guthrie Center, moving southeast at 40 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...
Audubon, Guthrie Center, Stuart, Panora, Lake Panorama, Exira, Adair,
Elk Horn, Bayard, Casey, Diamondhead Lake, Menlo, Kimballton, Bagley,
Yale, Brayton, Gray, Audubon County Airport and Springbrook State
Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4186 9509 4186 9463 4193 9463 4204 9446
4150 9424 4151 9504 4160 9504 4160 9509
TIME...MOT...LOC 0343Z 335DEG 34KT 4162 9466
HAIL...1.00IN
WIND...60MPH
$$
Small683
WWUS53 KDMX 170401
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
1101 PM CDT Wed Jun 16 2021
IAC009-073-077-170430-
/O.CON.KDMX.SV.W.0009.000000T0000Z-210617T0430Z/
Greene IA-Guthrie IA-Audubon IA-
1101 PM CDT Wed Jun 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR SOUTHWESTERN GREENE...GUTHRIE AND AUDUBON COUNTIES...
At 1100 PM CDT, a severe thunderstorm was located 12 miles northwest
of Greenfield, moving southeast at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Audubon, Guthrie Center, Stuart, Panora, Lake Panorama, Exira, Adair,
Elk Horn, Bayard, Casey, Diamondhead Lake, Menlo, Kimballton, Bagley,
Yale, Brayton, Gray, Audubon County Airport and Springbrook State
Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4186 9509 4186 9463 4193 9463 4204 9446
4150 9424 4151 9504 4160 9504 4160 9509
TIME...MOT...LOC 0400Z 336DEG 33KT 4147 9457
HAIL...0.75IN
WIND...60MPH
$$
Small257
WWUS53 KDMX 170416
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
1116 PM CDT Wed Jun 16 2021
IAC009-073-077-170426-
/O.CAN.KDMX.SV.W.0009.000000T0000Z-210617T0430Z/
Greene IA-Guthrie IA-Audubon IA-
1116 PM CDT Wed Jun 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GREENE...GUTHRIE
AND AUDUBON COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled. However gusty winds are still possible with this
thunderstorm.
A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
central, south central, southwestern and west central Iowa.
LAT...LON 4186 9509 4186 9463 4193 9463 4204 9446
4150 9424 4151 9504 4160 9504 4160 9509
TIME...MOT...LOC 0414Z 336DEG 33KT 4133 9449
$$
SmallThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 8:57 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 63 min |
| Jun 16, 9:39 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford | 51 min |
| Jun 16, 10:18 PM CDT | Special Weather Statement | DMX | Audubon, Guthrie | 42 min |
| Jun 16, 10:53 PM CDT | Special Weather Statement | DMX | Adair, Cass, Madison | 52 min |
| Jun 16, 11:31 PM CDT | Special Weather Statement | DMX | Adams, Ringgold, Taylor, Union | 59 min |
| Jun 17, 2:54 PM CDT | Special Weather Statement | DMX | Cerro Gordo, Hancock, Winnebago, Worth | 66 min |
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.