Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 43, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 14, 2021, 11:40 AM CDT for Jo Daviess County, Illinois; Delaware County, Dubuque County, Jackson County, Iowa. It was in force for 35 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
- Jul 14, 2021, 11:40 AM CDT (16:40 UTC)
- Expired
- Jul 14, 2021, 12:15 PM CDT
- In force
- 35 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Delaware County, IA, Dubuque County, IA, Jackson County, IA, Jo Daviess County, IL
The radar
The Quad Cities radar (KDVN), 100 km from the middle of the area, began a volume at 16:39 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 |
|---|---|---|---|
| Jul 14, 8:54 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 4.7 hours before the alert went out and 101 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
- 573 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1106 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
225
WUUS53 KDVN 141640
SVRDVN
ILC085-IAC055-061-097-141715-
/O.NEW.KDVN.SV.W.0043.210714T1640Z-210714T1715Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
1140 AM CDT Wed Jul 14 2021
The National Weather Service in the Quad Cities has issued a
* Severe Thunderstorm Warning for...
Northwestern Jo Daviess County in northwestern Illinois...
North central Jackson County in east central Iowa...
Dubuque County in northeastern Iowa...
Southeastern Delaware County in northeastern Iowa...
* Until 1215 PM CDT.
* At 1140 AM CDT, a severe thunderstorm was located near Dyersville,
or 18 miles east of Manchester, moving east 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...
Farley around 1145 AM CDT.
Epworth and Bankston around 1150 AM CDT.
Peosta around 1155 AM CDT.
Dubuque and Centralia around 1200 PM CDT.
Other locations in the path of this severe thunderstorm include
Asbury, Durango, Sageville and East Dubuque.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4257 9066 4256 9066 4254 9064 4251 9064
4251 9060 4234 9058 4233 9124 4251 9127
4260 9069
TIME...MOT...LOC 1640Z 263DEG 38KT 4244 9109
HAIL...1.00IN
WIND...60MPH
$$
DC4 follow-up statements
870
WWUS53 KDVN 141651
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1151 AM CDT Wed Jul 14 2021
ILC085-IAC055-061-097-141715-
/O.CON.KDVN.SV.W.0043.000000T0000Z-210714T1715Z/
Jo Daviess IL-Jackson IA-Dubuque IA-Delaware IA-
1151 AM CDT Wed Jul 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR NORTHWESTERN JO DAVIESS...NORTH CENTRAL JACKSON...DUBUQUE AND
SOUTHEASTERN DELAWARE COUNTIES...
At 1151 AM CDT, a severe thunderstorm was located over Epworth, or 12
miles west of Dubuque, moving east at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Peosta around 1155 AM CDT.
Dubuque and Centralia around 1200 PM CDT.
Other locations in the path of this severe thunderstorm include
Asbury, Durango, East Dubuque and Sageville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
&&
LAT...LON 4257 9066 4256 9066 4254 9064 4251 9064
4251 9060 4234 9058 4233 9123 4252 9123
4260 9069
TIME...MOT...LOC 1651Z 263DEG 38KT 4245 9093
HAIL...1.00IN
WIND...60MPH
$$
DC734
WWUS53 KDVN 141700
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1200 PM CDT Wed Jul 14 2021
ILC085-IAC055-061-097-141715-
/O.CON.KDVN.SV.W.0043.000000T0000Z-210714T1715Z/
Jo Daviess IL-Jackson IA-Dubuque IA-Delaware IA-
1200 PM CDT Wed Jul 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR NORTHWESTERN JO DAVIESS...NORTH CENTRAL JACKSON...DUBUQUE AND
EAST CENTRAL DELAWARE COUNTIES...
At 1200 PM CDT, a severe thunderstorm was located over Peosta, or 9
miles west of Dubuque, moving east 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 storm will be near...
Dubuque around 1205 PM CDT.
Asbury, Sageville and Durango around 1210 PM CDT.
Other locations in the path of this severe thunderstorm include East
Dubuque.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
&&
LAT...LON 4257 9066 4256 9066 4254 9064 4251 9064
4251 9060 4234 9058 4233 9114 4253 9116
4260 9069
TIME...MOT...LOC 1700Z 262DEG 36KT 4246 9086
HAIL...1.00IN
WIND...60MPH
$$
DC317
WWUS53 KDVN 141707
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1207 PM CDT Wed Jul 14 2021
IAC055-141716-
/O.CAN.KDVN.SV.W.0043.000000T0000Z-210714T1715Z/
Delaware IA-
1207 PM CDT Wed Jul 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DELAWARE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 300 PM CDT for
northeastern Iowa.
LAT...LON 4257 9066 4256 9066 4254 9064 4251 9064
4251 9060 4234 9058 4233 9109 4253 9107
4260 9069
TIME...MOT...LOC 1706Z 262DEG 36KT 4247 9078
$$
ILC085-IAC061-097-141715-
/O.CON.KDVN.SV.W.0043.000000T0000Z-210714T1715Z/
Jo Daviess IL-Jackson IA-Dubuque IA-
1207 PM CDT Wed Jul 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR NORTHWESTERN JO DAVIESS...NORTH CENTRAL JACKSON AND CENTRAL
DUBUQUE COUNTIES...
At 1206 PM CDT, a severe thunderstorm was located near Asbury, or
near Dubuque, moving east 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 storm will be near...
Dubuque and Sageville around 1210 PM CDT.
East Dubuque around 1215 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4257 9066 4256 9066 4254 9064 4251 9064
4251 9060 4234 9058 4233 9109 4253 9107
4260 9069
TIME...MOT...LOC 1706Z 262DEG 36KT 4247 9078
HAIL...1.00IN
WIND...60MPH
$$
DC717
WWUS53 KDVN 141712
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1212 PM CDT Wed Jul 14 2021
IAC061-097-ILC085-141721-
/O.EXP.KDVN.SV.W.0043.000000T0000Z-210714T1715Z/
Jo Daviess IL-Jackson IA-Dubuque IA-
1212 PM CDT Wed Jul 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN JO DAVIESS...
NORTH CENTRAL JACKSON AND CENTRAL DUBUQUE COUNTIES WILL EXPIRE AT
1215 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 300 PM CDT for
northeastern Iowa.
LAT...LON 4257 9066 4256 9066 4254 9064 4251 9064
4251 9060 4234 9058 4233 9109 4253 9107
4260 9069
TIME...MOT...LOC 1711Z 263DEG 38KT 4247 9078
$$
DCThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 12:35 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess | 40 min |
| Jul 14, 1:07 PM CDT | Special Weather Statement | DVN | Rock Island | 38 min |
| Jul 14, 1:13 PM CDT | Special Weather Statement | DVN | Carroll, Jo Daviess, Stephenson, Whiteside | 32 min |
| Jul 14, 1:47 PM CDT | Special Weather Statement | DVN | Whiteside | 28 min |
| Jul 14, 2:03 PM CDT | Special Weather Statement | DVN | Stephenson | 42 min |
| Jul 14, 2:17 PM CDT | Special Weather Statement | DVN | Henry, Whiteside | 28 min |
| Jul 14, 2:49 PM CDT | Special Weather Statement | DVN | Bureau | 41 min |
| Jul 14, 3:30 PM CDT | Special Weather Statement | DVN | Bureau | 45 min |
| Jul 14, 4:27 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 33 min |
| Jul 14, 5:38 AM CDT | Special Weather Statement | DVN | Buchanan | 37 min |
| Jul 14, 9:32 AM CDT | Special Weather Statement | DVN | Keokuk | 28 min |
| Jul 14, 10:02 AM CDT | Special Weather Statement | DVN | Benton, Iowa, Jefferson, Keokuk, Washington | 28 min |
| Jul 14, 10:28 AM CDT | Special Weather Statement | DVN | Benton, Buchanan, Henry, Iowa, Jefferson, Johnson and 1 more | 32 min |
| Jul 14, 10:58 AM CDT | Special Weather Statement | DVN | Delaware, Johnson, Linn, Louisa, Washington | 32 min |
| Jul 14, 11:31 AM CDT | Special Weather Statement | DVN | Cedar, Clinton, Dubuque, Jackson, Jones, Scott | 29 min |
| Jul 14, 12:15 PM CDT | Special Weather Statement | DVN | Clinton, Dubuque, Jackson | 30 min |
| Jul 14, 6:04 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 41 min |
| Jul 14, 6:25 PM CDT | Tornado Warning | DVN | Buchanan | 50 min |
| Jul 14, 6:32 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan | 43 min |
| Jul 14, 6:56 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 49 min |
| Jul 14, 6:58 PM CDT | Tornado Warning | DVN | Benton | 47 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2021Severe Thunderstorm Warnings in Illinois, 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.