Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 53, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 14, 2021, 9:08 PM CDT for Benton County, Iowa County, Iowa. It was in force for 32 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, 9:08 PM CDT (02:08 UTC)
- Expired
- Jul 14, 2021, 9:40 PM CDT
- In force
- 32 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Benton County, IA, Iowa County, IA
The radar
The Quad Cities radar (KDVN), 130 km from the middle of the area, began a volume at 02:11 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 |
|---|---|---|---|
| Jul 14, 2:35 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 2.1 hours before the alert went out and 137 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
- 2569 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 253 m²/s²
- 0-3 km storm-relative helicity
- 346 m²/s²
- Significant tornado parameter
- 3.2
- Supercell composite
- 23.4
The text
As transmitted.
858 WUUS53 KDVN 150208 SVRDVN IAC011-095-150300- /O.NEW.KDVN.SV.W.0053.210715T0208Z-210715T0300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Quad Cities IA/IL 908 PM CDT Wed Jul 14 2021 The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Southern Benton County in east central Iowa... Iowa County in east central Iowa... * Until 1000 PM CDT. * At 907 PM CDT, a severe thunderstorm was located 7 miles north of Brooklyn, or 12 miles southeast of Toledo, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * This severe thunderstorm will be near... Belle Plaine and Victor around 920 PM CDT. Other locations in the path of this severe thunderstorm include Ladora, Luzerne, Blairstown, Marengo, Williamsburg, Conroy, Walford and Amana. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 1100 PM CDT for east central Iowa. For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4200 9230 4199 9184 4160 9184 4166 9230 TIME...MOT...LOC 0207Z 277DEG 33KT 4184 9245 HAIL...<.75IN WIND...60MPH $$ Speck
3 follow-up statements
837 WWUS53 KDVN 150221 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 921 PM CDT Wed Jul 14 2021 IAC011-095-150300- /O.CON.KDVN.SV.W.0053.000000T0000Z-210715T0300Z/ Benton IA-Iowa IA- 921 PM CDT Wed Jul 14 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR SOUTHERN BENTON AND IOWA COUNTIES... At 921 PM CDT, a severe thunderstorm was located near Belle Plaine, or 10 miles west of Marengo, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Ladora, Luzerne, Blairstown, Marengo, Williamsburg, Conroy, Norway, Walford and Amana. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 1100 PM CDT for east central Iowa. For your protection move to an interior room on the lowest floor of a sturdy building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4200 9230 4199 9184 4160 9184 4166 9230 TIME...MOT...LOC 0221Z 277DEG 33KT 4182 9227 HAIL...<.75IN WIND...60MPH $$ Speck
302 WWUS53 KDVN 150230 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 930 PM CDT Wed Jul 14 2021 IAC011-095-150300- /O.CON.KDVN.SV.W.0053.000000T0000Z-210715T0300Z/ Benton IA-Iowa IA- 930 PM CDT Wed Jul 14 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR SOUTHERN BENTON AND IOWA COUNTIES... At 930 PM CDT, a severe thunderstorm was located near Ladora, or near Marengo, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Marengo, Williamsburg, Belle Plaine, Atkins, Walford, Victor, Newhall, Blairstown, Keystone, Norway, Ladora, Luzerne, Amana, Conroy, Middle Amana, Upper South Amana, East Amana, Hannen Lake Park, Koszta and High Amana. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 1100 PM CDT for east central Iowa. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4200 9230 4199 9184 4160 9184 4166 9230 TIME...MOT...LOC 0230Z 277DEG 33KT 4181 9215 HAIL...<.75IN WIND...60MPH $$ Speck
109
WWUS53 KDVN 150240
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
940 PM CDT Wed Jul 14 2021
IAC011-095-150249-
/O.CAN.KDVN.SV.W.0053.000000T0000Z-210715T0300Z/
Benton IA-Iowa IA-
940 PM CDT Wed Jul 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BENTON AND IOWA
COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm. Trained weather spotters in
Iowa county reported wind gusts of 30 to 40 MPH.
A Tornado Watch remains in effect until 1100 PM CDT for east central
Iowa.
LAT...LON 4200 9230 4199 9184 4160 9184 4166 9230
TIME...MOT...LOC 0237Z 277DEG 33KT 4180 9203
$$
SpeckThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 7:28 PM CDT | Tornado Warning | DVN | Buchanan, Delaware | 17 min |
| Jul 14, 7:37 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Linn | 38 min |
| Jul 14, 7:40 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 35 min |
| Jul 14, 7:43 PM CDT | Tornado Warning | DVN | Benton | 32 min |
| Jul 14, 7:43 PM CDT | Tornado Warning | DVN | Buchanan, Delaware | 32 min |
| Jul 14, 7:53 PM CDT | Tornado Warning | DVN | Benton | 27 min |
| Jul 14, 8:11 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 19 min |
| Jul 14, 8:14 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Linn | 46 min |
| Jul 14, 8:19 PM CDT | Tornado Warning | DVN | Benton, Linn | 22 min |
| Jul 14, 8:31 PM CDT | Tornado Warning | DVN | Benton, Linn | 29 min |
| Jul 14, 8:56 PM CDT | Tornado Warning | DVN | Delaware, Linn | 49 min |
| Jul 14, 9:29 PM CDT | Tornado Warning | DVN | Delaware, Jones | 46 min |
| Jul 14, 10:02 PM CDT | Tornado Warning | DVN | Jones | 43 min |
| Jul 14, 10:14 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Jones, Linn | 46 min |
| Jul 14, 10:34 PM CDT | Tornado Warning | DVN | Cedar | 26 min |
| Jul 14, 10:41 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 49 min |
| Jul 14, 10:52 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jones, Scott | 38 min |
| Jul 14, 11:10 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 50 min |
| Jul 15, 8:58 AM CDT | Special Weather Statement | DVN | Henry, Jefferson | 47 min |
| Jul 15, 5:23 PM CDT | Special Weather Statement | DVN | Clinton | 37 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.