Alert archive / Iowa / Special Weather Statements in 2018
Special Weather Statement, NWS Quad Cities, IA
NWS Quad Cities, IA issued this special weather statement at Aug 6, 2018, 12:21 AM CDT for Benton County, Iowa. It was in force for 39 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 6, 2018, 12:21 AM CDT (05:21 UTC)
- Expired
- Aug 6, 2018, 1:00 AM CDT
- In force
- 39 min
- Issued by
- NWS Quad Cities, IA
County Benton County, IA
The radar
The Quad Cities radar (KDVN), 143 km from the middle of the area, began a volume at 05:21 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 00:00Z, 5.4 hours before the alert went out and 148 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
- 1536 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 1707 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 198 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 7.7
The text
As transmitted.
435
WWUS83 KDVN 060521
SPSDVN
Special Weather Statement
National Weather Service Quad Cities IA/IL
1221 AM CDT MON AUG 6 2018
IAC011-019-060600-
Buchanan-Benton-
1221 AM CDT MON AUG 6 2018
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN BUCHANAN AND
NORTHERN BENTON COUNTIES UNTIL 100 AM CDT...
At 1220 AM CDT, a strong thunderstorm was located near Dysart, or 16
miles south of Waterloo, moving east at 40 mph.
Wind gusts up to 50 mph and nickel size hail are possible with this
storm.
Locations impacted include...
Independence, Vinton, Urbana, Dysart, Shellsburg, Garrison, Brandon,
Mount Auburn, Lime Creek County Park, Vinton Memorial Airport,
Rodgers Park, Benton City Park, Hoefle-Dulin Park, Spencers Grove,
Minne Estema Park, Benton County Fairgrounds, Independence Airport,
Wildcat Bluff Park and Cheney.
This includes Interstate 380 between mile markers 40 and 55.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
LAT...LON 4230 9230 4230 9207 4244 9206 4246 9186
4213 9183 4208 9184 4211 9230
TIME...MOT...LOC 0520Z 265DEG 34KT 4225 9236
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 7:37 PM CDT | Special Weather Statement | DVN | Johnson | 38 min |
| Aug 5, 7:39 PM CDT | Special Weather Statement | DVN | Buchanan, Delaware | 36 min |
| Aug 5, 9:21 PM CDT | Special Weather Statement | DVN | Buchanan, Delaware | 39 min |
| Aug 5, 10:11 PM CDT | Special Weather Statement | DVN | Dubuque, Jackson | 49 min |
| Aug 5, 10:20 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson, Jones | 55 min |
| Aug 6, 12:38 AM CDT | Special Weather Statement | DVN | Buchanan, Delaware | 82 min |
| Aug 6, 2:01 AM CDT | Flash Flood Warning | DVN | Buchanan, Delaware | 5 hr |
| Aug 6, 5:20 AM CDT | Special Weather Statement | DVN | Dubuque | 85 min |
| Aug 6, 6:49 PM CDT | Special Weather Statement | DVN | Lee, Van Buren | 26 min |
| Aug 6, 12:01 AM CDT | Special Weather Statement | DVN | Stephenson | 29 min |
Nearby
Special Weather Statements in Iowa, 2018Every special weather statement in 2018
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.