Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 93, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 24, 2021, 5:05 PM CDT for Benton County, Iowa County, Iowa. It was in force for 40 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
- Aug 24, 2021, 5:05 PM CDT (22:05 UTC)
- Expired
- Aug 24, 2021, 5:45 PM CDT
- In force
- 40 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), 137 km from the middle of the area, began a volume at 22:06 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 |
|---|---|---|---|
| Aug 24, 1:52 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.1 hours before the alert went out and 143 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
- 1809 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 1284 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
281 WUUS53 KDVN 242205 SVRDVN IAC011-095-242245- /O.NEW.KDVN.SV.W.0093.210824T2205Z-210824T2245Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Quad Cities IA/IL 505 PM CDT Tue Aug 24 2021 The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Benton County in east central Iowa... Northern Iowa County in east central Iowa... * Until 545 PM CDT. * At 504 PM CDT, severe thunderstorms were located along a line extending from near La Porte City to near Van Horne to near Belle Plaine, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Severe thunderstorms will be near... Van Horne around 510 PM CDT. Newhall and Garrison around 515 PM CDT. Vinton, Marengo, Shellsburg and Norway around 520 PM CDT. Other locations in the path of these severe thunderstorms include Atkins, Walford, Urbana and Amana. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with these storms. 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 these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4229 9230 4229 9183 4173 9183 4183 9230 TIME...MOT...LOC 2204Z 284DEG 44KT 4229 9228 4205 9215 4183 9229 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Gibbs
3 follow-up statements
225 WWUS53 KDVN 242215 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 515 PM CDT Tue Aug 24 2021 IAC011-095-242245- /O.CON.KDVN.SV.W.0093.000000T0000Z-210824T2245Z/ Benton IA-Iowa IA- 515 PM CDT Tue Aug 24 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR BENTON AND NORTHERN IOWA COUNTIES... At 514 PM CDT, severe thunderstorms were located along a line extending from Mount Auburn to near Newhall to near Marengo, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe storms will be near... Shellsburg, Newhall and Norway around 520 PM CDT. Atkins and Walford around 525 PM CDT. Other locations in the path of these severe thunderstorms include Urbana and Amana. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with these storms. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4229 9230 4229 9183 4173 9183 4183 9230 TIME...MOT...LOC 2214Z 284DEG 44KT 4226 9212 4202 9199 4180 9213 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Gibbs
738
WWUS53 KDVN 242231
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
531 PM CDT Tue Aug 24 2021
IAC011-095-242245-
/O.CON.KDVN.SV.W.0093.000000T0000Z-210824T2245Z/
Benton IA-Iowa IA-
531 PM CDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR BENTON AND NORTHERN IOWA COUNTIES...
At 531 PM CDT, severe thunderstorms were located along a line
extending from near Vinton to Walford to near Williamsburg, moving
southeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Amana around 535 PM CDT.
Other locations in the path of these severe thunderstorms include
Atkins.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4229 9183 4173 9183 4183 9230 4201 9230
4202 9216 4229 9213
TIME...MOT...LOC 2231Z 293DEG 38KT 4213 9195 4189 9182 4167 9196
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gibbs433
WWUS53 KDVN 242242
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
542 PM CDT Tue Aug 24 2021
IAC011-095-242251-
/O.EXP.KDVN.SV.W.0093.000000T0000Z-210824T2245Z/
Benton IA-Iowa IA-
542 PM CDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR BENTON AND NORTHERN IOWA
COUNTIES WILL EXPIRE AT 545 PM CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
east central Iowa.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Quad Cities.
LAT...LON 4229 9183 4173 9183 4183 9230 4201 9230
4202 9216 4229 9213
TIME...MOT...LOC 2241Z 284DEG 44KT 4210 9181 4186 9168 4164 9182
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 2:21 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 39 min |
| Aug 24, 2:49 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Jones, Linn | 56 min |
| Aug 24, 3:03 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware, Dubuque | 42 min |
| Aug 24, 3:38 PM CDT | Tornado Warning | DVN | Dubuque | 25 min |
| Aug 24, 3:42 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 48 min |
| Aug 24, 4:07 PM CDT | Special Weather Statement | DVN | Cedar, Clinton, Jackson, Johnson | 23 min |
| Aug 24, 4:17 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 58 min |
| Aug 24, 4:54 PM CDT | Special Weather Statement | DVN | Benton | 36 min |
| Aug 24, 5:01 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 59 min |
| Aug 24, 5:23 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 37 min |
| Aug 24, 5:27 PM CDT | Special Weather Statement | DVN | Johnson | 48 min |
| Aug 24, 6:07 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Linn | 38 min |
| Aug 24, 6:49 PM CDT | Special Weather Statement | DVN | Scott | 41 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.