Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 32, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 9, 2021, 5:16 PM CDT for 4 counties in Iowa. It was in force for 29 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 9, 2021, 5:16 PM CDT (22:16 UTC)
- Expired
- Jul 9, 2021, 5:45 PM CDT
- In force
- 29 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Iowa County, IA, Johnson County, IA, Keokuk County, IA, Washington County, IA
The radar
The Quad Cities radar (KDVN), 109 km from the middle of the area, began a volume at 22:18 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 nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.3 hours before the alert went out and 116 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1131 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
197 WUUS53 KDVN 092216 SVRDVN IAC095-103-107-183-092245- /O.NEW.KDVN.SV.W.0032.210709T2216Z-210709T2245Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Quad Cities IA/IL 516 PM CDT Fri Jul 9 2021 The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Northeastern Keokuk County in southeastern Iowa... Southwestern Johnson County in east central Iowa... Northwestern Washington County in southeastern Iowa... Southeastern Iowa County in east central Iowa... * Until 545 PM CDT. * At 515 PM CDT, a severe thunderstorm was located over Parnell, or 13 miles south of Marengo, moving east at 30 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will be near... Wellman around 535 PM CDT. Other locations in the path of this severe thunderstorm include Kalona and Richmond. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4153 9212 4167 9206 4162 9155 4140 9161 TIME...MOT...LOC 2215Z 281DEG 28KT 4160 9200 HAIL...1.00IN WIND...<50MPH $$ DC
3 follow-up statements
366 WWUS53 KDVN 092225 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 525 PM CDT Fri Jul 9 2021 IAC095-103-107-183-092245- /O.CON.KDVN.SV.W.0032.000000T0000Z-210709T2245Z/ Keokuk IA-Johnson IA-Washington IA-Iowa IA- 525 PM CDT Fri Jul 9 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR NORTHEASTERN KEOKUK...SOUTHWESTERN JOHNSON...NORTHWESTERN WASHINGTON AND SOUTHEASTERN IOWA COUNTIES... At 525 PM CDT, a severe thunderstorm was located near Parnell, or 17 miles southeast of Marengo, moving east at 30 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. This severe storm will be near... Wellman around 535 PM CDT. Other locations in the path of this severe thunderstorm include Kalona, Richmond and Riverside. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. && LAT...LON 4153 9212 4167 9206 4162 9155 4140 9161 TIME...MOT...LOC 2225Z 281DEG 28KT 4158 9190 HAIL...1.00IN WIND...<50MPH $$ DC
856 WWUS53 KDVN 092235 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 535 PM CDT Fri Jul 9 2021 IAC095-103-107-183-092245- /O.CON.KDVN.SV.W.0032.000000T0000Z-210709T2245Z/ Keokuk IA-Johnson IA-Washington IA-Iowa IA- 535 PM CDT Fri Jul 9 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR NORTHEASTERN KEOKUK...SOUTHWESTERN JOHNSON...NORTHWESTERN WASHINGTON AND SOUTHEASTERN IOWA COUNTIES... At 535 PM CDT, a severe thunderstorm was located 7 miles north of Wellman, or 14 miles southwest of Iowa City, moving east at 30 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. This severe storm will be near... Kalona and Richmond around 545 PM CDT. Other locations in the path of this severe thunderstorm include Riverside. LAT...LON 4153 9212 4167 9206 4162 9155 4140 9161 TIME...MOT...LOC 2235Z 281DEG 28KT 4156 9180 HAIL...1.00IN WIND...<50MPH $$ DC
396
WWUS53 KDVN 092243
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
543 PM CDT Fri Jul 9 2021
IAC095-103-107-183-092252-
/O.EXP.KDVN.SV.W.0032.000000T0000Z-210709T2245Z/
Keokuk IA-Johnson IA-Washington IA-Iowa IA-
543 PM CDT Fri Jul 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KEOKUK...
SOUTHWESTERN JOHNSON...NORTHWESTERN WASHINGTON AND SOUTHEASTERN IOWA
COUNTIES WILL EXPIRE AT 545 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
and heavy rain are still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Quad Cities.
LAT...LON 4153 9212 4167 9206 4162 9155 4140 9161
TIME...MOT...LOC 2242Z 281DEG 28KT 4155 9174
$$
DCThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 2:49 AM CDT | Flash Flood Watch | DVN | Des Moines, Henry, Jefferson, Lee, Van Buren | 40 hr |
| Jul 9, 5:04 PM CDT | Special Weather Statement | DVN | Iowa | 26 min |
| Jul 9, 5:34 PM CDT | Special Weather Statement | DVN | Benton | 26 min |
| Jul 9, 5:59 PM CDT | Special Weather Statement | DVN | Benton, Des Moines, Henry, Iowa, Jefferson, Johnson and 3 more | 31 min |
| Jul 9, 6:07 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Washington | 23 min |
| Jul 9, 6:23 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Louisa | 37 min |
| Jul 9, 6:37 PM CDT | Special Weather Statement | DVN | Iowa | 23 min |
| Jul 9, 6:50 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry | 25 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.