Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 51, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 22, 2021, 6:09 PM CDT for 5 counties in Iowa. It was in force for 51 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 22, 2021, 6:09 PM CDT (23:09 UTC)
- Expired
- Jun 22, 2021, 7:00 PM CDT
- In force
- 51 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Boone County, IA, Calhoun County, IA, Carroll County, IA, Greene County, IA, Webster County, IA
The radar
The Des Moines radar (KDMX), 77 km from the middle of the area, began a volume at 23:11 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 22, 4:49 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.2 hours before the alert went out and 180 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1910 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 259 m²/s²
- 0-3 km storm-relative helicity
- 324 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
100
WUUS53 KDMX 222309
SVRDMX
IAC015-025-027-073-187-230000-
/O.NEW.KDMX.SV.W.0051.210622T2309Z-210623T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
609 PM CDT Tue Jun 22 2021
The National Weather Service in Des Moines has issued a
* Severe Thunderstorm Warning for...
Greene County in west central Iowa...
Southwestern Webster County in central Iowa...
Southeastern Calhoun County in west central Iowa...
Northwestern Boone County in central Iowa...
Northeastern Carroll County in west central Iowa...
* Until 700 PM CDT.
* At 609 PM CDT, a severe thunderstorm was located 11 miles west of
Gowrie, or 13 miles southeast of Rockwell City, moving southeast at
45 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 be near...
Jefferson around 625 PM CDT.
Other locations in the path of this severe thunderstorm include
Ogden.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4221 9486 4221 9481 4236 9453 4215 9386
4186 9425 4186 9428
TIME...MOT...LOC 2309Z 302DEG 41KT 4223 9450
HAIL...1.00IN
WIND...60MPH
$$
Krull3 follow-up statements
729
WWUS53 KDMX 222327
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
627 PM CDT Tue Jun 22 2021
IAC187-222336-
/O.CAN.KDMX.SV.W.0051.000000T0000Z-210623T0000Z/
Webster IA-
627 PM CDT Tue Jun 22 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WEBSTER COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
west central Iowa.
LAT...LON 4221 9486 4221 9481 4226 9458 4203 9403
4186 9425 4186 9428
TIME...MOT...LOC 2326Z 311DEG 45KT 4206 9452
$$
IAC015-025-027-073-230000-
/O.CON.KDMX.SV.W.0051.000000T0000Z-210623T0000Z/
Greene IA-Calhoun IA-Boone IA-Carroll IA-
627 PM CDT Tue Jun 22 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR GREENE...SOUTH CENTRAL CALHOUN...WEST CENTRAL BOONE AND
NORTHEASTERN CARROLL COUNTIES...
At 626 PM CDT, a severe thunderstorm was located 7 miles northwest of
Jefferson, moving southeast at 50 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...
Jefferson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4221 9486 4221 9481 4226 9458 4203 9403
4186 9425 4186 9428
TIME...MOT...LOC 2326Z 311DEG 45KT 4206 9452
HAIL...1.00IN
WIND...60MPH
$$
Krull256
WWUS53 KDMX 222338
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
638 PM CDT Tue Jun 22 2021
IAC015-025-027-073-230000-
/O.CON.KDMX.SV.W.0051.000000T0000Z-210623T0000Z/
Greene IA-Calhoun IA-Boone IA-Carroll IA-
638 PM CDT Tue Jun 22 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR GREENE...SOUTHEASTERN CALHOUN...WEST CENTRAL BOONE AND EAST
CENTRAL CARROLL COUNTIES...
At 638 PM CDT, a severe thunderstorm was located 8 miles west of
Jefferson, moving southeast at 40 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Jefferson, Ogden, Grand Junction, Scranton, Churdan, Rippey, Dana,
Beaver and Jefferson Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4210 9468 4213 9465 4221 9446 4203 9403
4186 9425 4186 9428
TIME...MOT...LOC 2338Z 316DEG 33KT 4199 9454
HAIL...1.50IN
WIND...60MPH
$$
Krull537
WWUS53 KDMX 222343
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
643 PM CDT Tue Jun 22 2021
IAC025-222353-
/O.CAN.KDMX.SV.W.0051.000000T0000Z-210623T0000Z/
Calhoun IA-
643 PM CDT Tue Jun 22 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CALHOUN COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
west central Iowa.
LAT...LON 4209 9465 4211 9461 4215 9442 4201 9406
4186 9425 4186 9428
TIME...MOT...LOC 2343Z 302DEG 41KT 4196 9447
$$
IAC015-027-073-230000-
/O.CON.KDMX.SV.W.0051.000000T0000Z-210623T0000Z/
Greene IA-Boone IA-Carroll IA-
643 PM CDT Tue Jun 22 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR CENTRAL GREENE...WEST CENTRAL BOONE AND NORTHEASTERN CARROLL
COUNTIES...
At 643 PM CDT, a severe thunderstorm was located near Jefferson,
moving southeast at 45 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Jefferson, Grand Junction, Scranton, Rippey, Beaver and Jefferson
Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4209 9465 4211 9461 4215 9442 4201 9406
4186 9425 4186 9428
TIME...MOT...LOC 2343Z 302DEG 41KT 4196 9447
HAIL...1.75IN
WIND...60MPH
$$
KrullThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 4:59 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 46 min |
| Jun 22, 5:22 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 38 min |
| Jun 22, 5:30 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 45 min |
| Jun 22, 5:50 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 40 min |
| Jun 22, 5:52 PM CDT | Special Weather Statement | DMX | Poweshiek | 23 min |
| Jun 22, 5:58 PM CDT | Severe Thunderstorm Warning | DMX | Polk, Warren | 47 min |
| Jun 22, 6:30 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Marion, Warren | 45 min |
| Jun 22, 6:33 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene | 42 min |
| Jun 22, 6:42 PM CDT | Special Weather Statement | DMX | Tama | 63 min |
| Jun 22, 6:49 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 41 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.