Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 6, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 18, 2021, 11:03 PM CDT for Des Moines County, Iowa. It was in force for 27 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 18, 2021, 11:03 PM CDT (04:03 UTC)
- Expired
- Jun 18, 2021, 11:30 PM CDT
- In force
- 27 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Des Moines County, IA
The radar
The Quad Cities radar (KDVN), 83 km from the middle of the area, began a volume at 04:04 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 18, 10:08 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 4.1 hours before the alert went out and 87 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
- 4 J/kg
- Mixed-layer CIN
- -335 J/kg
- Mixed-layer LCL
- 2572 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
198
WUUS53 KDVN 190403
SVRDVN
IAC057-190430-
/O.NEW.KDVN.SV.W.0006.210619T0403Z-210619T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
1103 PM CDT Fri Jun 18 2021
The National Weather Service in the Quad Cities has issued a
* Severe Thunderstorm Warning for...
Northeastern Des Moines County in southeastern Iowa...
* Until 1130 PM CDT.
* At 1103 PM CDT, a severe thunderstorm was located over Mediapolis,
or 9 miles northwest of Oquawka, moving east at 35 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...
Oquawka around 1120 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
&&
LAT...LON 4092 9129 4107 9125 4107 9095 4103 9094
4098 9096 4096 9095 4093 9096 4092 9097
4091 9100 4083 9108
TIME...MOT...LOC 0403Z 278DEG 30KT 4101 9111
HAIL...1.00IN
WIND...60MPH
$$
Gibbs2 follow-up statements
553
WWUS53 KDVN 190412
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1112 PM CDT Fri Jun 18 2021
IAC057-190430-
/O.CON.KDVN.SV.W.0006.000000T0000Z-210619T0430Z/
Des Moines IA-
1112 PM CDT Fri Jun 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHEASTERN DES MOINES COUNTY...
At 1112 PM CDT, a severe thunderstorm was located near Mediapolis, or
near Oquawka, moving east at 30 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Oquawka.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4092 9129 4107 9125 4107 9095 4103 9094
4098 9096 4096 9095 4093 9096 4092 9097
4091 9100 4083 9108
TIME...MOT...LOC 0412Z 283DEG 25KT 4098 9107
HAIL...1.25IN
WIND...60MPH
$$
Gibbs517
WWUS53 KDVN 190418
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1118 PM CDT Fri Jun 18 2021
IAC057-190430-
/O.CON.KDVN.SV.W.0006.000000T0000Z-210619T0430Z/
Des Moines IA-
1118 PM CDT Fri Jun 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHEASTERN DES MOINES COUNTY...
At 1117 PM CDT, a severe thunderstorm was located near Oquawka,
moving east at 30 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.
This severe storm will be near...
Oquawka around 1125 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4091 9122 4101 9114 4107 9095 4103 9094
4098 9096 4096 9095 4093 9096 4092 9097
4091 9100 4083 9108
TIME...MOT...LOC 0417Z 283DEG 25KT 4097 9102
HAIL...1.50IN
WIND...60MPH
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 10:17 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Louisa, Washington | 58 min |
| Jun 18, 11:21 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson | 39 min |
| Jun 18, 11:29 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Louisa | 46 min |
| Jun 18, 11:47 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Washington | 29 min |
| Jun 19, 12:02 AM CDT | Severe Thunderstorm Warning | DVN | Keokuk, Washington | 43 min |
| Jun 19, 12:12 AM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk, Van Buren, Washington | 48 min |
| Jun 19, 12:27 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa | 27 min |
| Jun 19, 1:08 AM CDT | Severe Thunderstorm Warning | DVN | Lee, Van Buren | 49 min |
| Jun 19, 1:28 AM CDT | Special Weather Statement | DVN | Louisa | 2 hr |
| Jun 19, 2:01 AM CDT | Special Weather Statement | DVN | Lee, Van Buren | 59 min |
| Jun 19, 4:33 AM CDT | Severe Thunderstorm Warning | DVN | Lee, Van Buren | 57 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.