Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 18, 2021, 11:21 PM CDT for Henry County, Jefferson County, Iowa. It was in force for 39 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 18, 2021, 11:21 PM CDT (04:21 UTC)
- Expired
- Jun 19, 2021, 12:00 AM CDT
- In force
- 39 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Henry County, IA, Jefferson County, IA
The radar
The Quad Cities radar (KDVN), 122 km from the middle of the area, began a volume at 04:21 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 19, 12:07 AM CDT | TSTM WND DMG | 1 Sse Fairfield, IA | TREE TOOK DOWN A POWER LINE AT THE INTERSECTION OF HARRISON AND MAIN STREETS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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, 4.4 hours before the alert went out and 128 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.
992
WUUS53 KDVN 190421
SVRDVN
IAC087-101-190500-
/O.NEW.KDVN.SV.W.0007.210619T0421Z-210619T0500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
1121 PM CDT Fri Jun 18 2021
The National Weather Service in the Quad Cities has issued a
* Severe Thunderstorm Warning for...
Western Henry County in southeastern Iowa...
Eastern Jefferson County in southeastern Iowa...
* Until midnight CDT.
* At 1121 PM CDT, a severe thunderstorm was located near Fairfield,
moving east at 30 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.
* This severe thunderstorm will be near...
Lockridge around 1135 PM CDT.
Other locations in the path of this severe thunderstorm include Rome,
Westwood and Mount Pleasant.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
&&
LAT...LON 4100 9204 4116 9202 4115 9150 4085 9152
TIME...MOT...LOC 0421Z 283DEG 25KT 4105 9190
HAIL...1.75IN
WIND...60MPH
$$
Gibbs4 follow-up statements
935
WWUS53 KDVN 190430
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1130 PM CDT Fri Jun 18 2021
IAC087-101-190500-
/O.CON.KDVN.SV.W.0007.000000T0000Z-210619T0500Z/
Henry IA-Jefferson IA-
1130 PM CDT Fri Jun 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR WESTERN HENRY AND NORTHEASTERN JEFFERSON COUNTIES...
At 1130 PM CDT, a severe thunderstorm was located near Lockridge, or
8 miles east of Fairfield, moving east at 30 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
This severe storm will be near...
Lockridge around 1135 PM CDT.
Other locations in the path of this severe thunderstorm include Rome,
Westwood and Mount Pleasant.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4101 9194 4108 9196 4116 9192 4115 9150
4085 9152
TIME...MOT...LOC 0430Z 283DEG 25KT 4103 9181
HAIL...1.75IN
WIND...60MPH
$$
Gibbs734
WWUS53 KDVN 190437 CCA
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1137 PM CDT Fri Jun 18 2021
IAC087-101-190500-
/O.COR.KDVN.SV.W.0007.000000T0000Z-210619T0500Z/
Henry IA-Jefferson IA-
1137 PM CDT Fri Jun 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR WESTERN HENRY AND NORTHEASTERN JEFFERSON COUNTIES...
At 1137 PM CDT, a severe thunderstorm was located over Lockridge, or
10 miles east of Fairfield, 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...
Rome around 1145 PM CDT.
Other locations in the path of this severe thunderstorm include
Westwood and Mount Pleasant.
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.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4101 9194 4108 9196 4116 9192 4115 9150
4085 9152
TIME...MOT...LOC 0430Z 283DEG 25KT 4103 9181
HAIL...1.50IN
WIND...60MPH
$$
Gibbs550
WWUS53 KDVN 190441
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1141 PM CDT Fri Jun 18 2021
IAC087-101-190500-
/O.CON.KDVN.SV.W.0007.000000T0000Z-210619T0500Z/
Henry IA-Jefferson IA-
1141 PM CDT Fri Jun 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR NORTHWESTERN HENRY AND NORTHEASTERN JEFFERSON COUNTIES...
At 1141 PM CDT, a severe thunderstorm was located over Lockridge, or
9 miles west of Mount Pleasant, moving east at 30 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Rome around 1145 PM CDT.
Westwood around 1150 PM CDT.
Other locations in the path of this severe thunderstorm include Mount
Pleasant.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4100 9185 4108 9184 4116 9182 4115 9150
4090 9153
TIME...MOT...LOC 0441Z 283DEG 25KT 4101 9171
HAIL...1.25IN
WIND...60MPH
$$
Gibbs865
WWUS53 KDVN 190454
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1154 PM CDT Fri Jun 18 2021
IAC087-101-190504-
/O.EXP.KDVN.SV.W.0007.000000T0000Z-210619T0500Z/
Henry IA-Jefferson IA-
1154 PM CDT Fri Jun 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HENRY AND
NORTHEASTERN JEFFERSON COUNTIES WILL EXPIRE AT MIDNIGHT CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
is still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
southeastern Iowa.
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 4100 9185 4108 9184 4116 9182 4115 9150
4090 9153
TIME...MOT...LOC 0454Z 283DEG 25KT 4099 9161
$$
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, 11:03 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 27 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.