Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 54, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 14, 2021, 10:14 PM CDT for 4 counties in Iowa. It was in force for 46 min. 3 reports 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
- Jul 14, 2021, 10:14 PM CDT (03:14 UTC)
- Expired
- Jul 14, 2021, 11:00 PM CDT
- In force
- 46 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cedar County, IA, Johnson County, IA, Jones County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 60 km from the middle of the area, began a volume at 03:17 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 |
|---|---|---|---|
| Jul 14, 10:15 PM CDT | TSTM WND GST 40 | University Heights, IA | ESTIMATED A WIND GUST OF 40 MPH WITH PEA SIZED HAIL AND HEAVY RAIN. |
| Jul 14, 10:30 PM CDT | TSTM WND DMG | West Branch, IA | A TRAINED SPOTTER RELAYED A PUBLIC REPORT OF A WALNUT TREE THAT SNAPPED AND LANDED ON THRE VEHICLES IN WEST BRANCH. |
| Jul 14, 10:33 PM CDT | TSTM WND GST 60 | 2 Ne Buchanan, IA | COUNTY OFFICIAL REPORTED ESTIMATED WIND GUSTS OF UP TO 60 MPH GENERALLY 6 MILES WEST OF THE TIPTON AREA. |
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 |
|---|---|---|---|
| Jul 14, 6:13 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 3.2 hours before the alert went out and 66 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.
505 WUUS53 KDVN 150314 SVRDVN IAC031-103-105-113-150400- /O.NEW.KDVN.SV.W.0054.210715T0314Z-210715T0400Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Quad Cities IA/IL 1014 PM CDT Wed Jul 14 2021 The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Cedar County in east central Iowa... Northeastern Johnson County in east central Iowa... Southern Jones County in east central Iowa... Southeastern Linn County in east central Iowa... * Until 1100 PM CDT. * At 1013 PM CDT, severe thunderstorms were located along a line extending from near Bertram to near Iowa City, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Severe thunderstorms will be near... West Branch, Mount Vernon, Lisbon and Martelle around 1025 PM CDT. Other locations in the path of these severe thunderstorms include Mechanicsville, Morley, Tipton, Olin, Rochester, Stanwood, Bennett and Durant. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until midnight CDT for east central Iowa. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4210 9099 4160 9092 4165 9156 4197 9160 TIME...MOT...LOC 0313Z 267DEG 37KT 4192 9154 4170 9152 HAIL...<.75IN WIND...60MPH $$ Speck
3 follow-up statements
715 WWUS53 KDVN 150330 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 1030 PM CDT Wed Jul 14 2021 IAC031-103-105-113-150400- /O.CON.KDVN.SV.W.0054.000000T0000Z-210715T0400Z/ Cedar IA-Johnson IA-Jones IA-Linn IA- 1030 PM CDT Wed Jul 14 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT FOR CEDAR...NORTHEASTERN JOHNSON...SOUTHERN JONES AND SOUTHEASTERN LINN COUNTIES... At 1030 PM CDT, severe thunderstorms were located along a line extending from near Lisbon to near West Branch, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Mechanicsville, Morley, Tipton, Stanwood, Olin, Rochester, Bennett and Durant. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until midnight CDT for east central Iowa. For your protection move to an interior room on the lowest floor of a sturdy building. && LAT...LON 4210 9099 4160 9092 4165 9156 4197 9160 TIME...MOT...LOC 0330Z 269DEG 36KT 4192 9135 4170 9133 HAIL...<.75IN WIND...60MPH $$ Speck
601 WWUS53 KDVN 150339 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 1039 PM CDT Wed Jul 14 2021 IAC103-113-150348- /O.CAN.KDVN.SV.W.0054.000000T0000Z-210715T0400Z/ Johnson IA-Linn IA- 1039 PM CDT Wed Jul 14 2021 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JOHNSON AND SOUTHEASTERN LINN COUNTIES IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. A Tornado Watch remains in effect until midnight CDT for east central Iowa. LAT...LON 4210 9099 4160 9092 4165 9135 4198 9136 TIME...MOT...LOC 0338Z 267DEG 37KT 4192 9125 4170 9123 $$ IAC031-105-150400- /O.CON.KDVN.SV.W.0054.000000T0000Z-210715T0400Z/ Cedar IA-Jones IA- 1039 PM CDT Wed Jul 14 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT FOR CEDAR AND SOUTHERN JONES COUNTIES... At 1038 PM CDT, severe thunderstorms were located along a line extending from Mechanicsville to near Rochester, moving east at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Trained weather spotters. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Tipton, West Branch, Durant, Mechanicsville, Stanwood, Olin, Wyoming, Bennett, Morley, Rochester, Buchanan, Clarence, Springdale, Cedar Valley, Cedar Bluff, Sunbury, Hale, Cedar Valley Park, Herbert Hoover National Historic Site and Tipton Matthews Airport. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until midnight CDT for east central Iowa. && LAT...LON 4210 9099 4160 9092 4165 9135 4198 9136 TIME...MOT...LOC 0338Z 267DEG 37KT 4192 9125 4170 9123 HAIL...<.75IN WIND...60MPH $$ Speck
391
WWUS53 KDVN 150356
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
1056 PM CDT Wed Jul 14 2021
IAC031-105-150406-
/O.EXP.KDVN.SV.W.0054.000000T0000Z-210715T0400Z/
Cedar IA-Jones IA-
1056 PM CDT Wed Jul 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR CEDAR AND SOUTHERN JONES
COUNTIES WILL EXPIRE AT 1100 PM CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until midnight CDT for east central
Iowa.
LAT...LON 4210 9099 4160 9092 4165 9135 4198 9136
TIME...MOT...LOC 0356Z 267DEG 37KT 4193 9101 4171 9099
$$
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, 9:08 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa | 32 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, 10:34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.