Alert archive / Iowa / Tornado Warnings in 2018
Tornado Warning 40, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Oct 9, 2018, 3:06 PM CDT for Benton County, Iowa County, Iowa. It was in force for 39 min. 2 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
- Oct 9, 2018, 3:06 PM CDT (20:06 UTC)
- Expired
- Oct 9, 2018, 3:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Benton County, IA, Iowa County, IA
The radar
The Des Moines radar (KDMX), 126 km from the middle of the area, began a volume at 20:05 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 |
|---|---|---|---|
| Oct 9, 3:48 PM CDT | TORNADO | 1 Se Blairstown, IA | EF0 BRIEF TOUCHDOWN OBSERVED IN FIELD BY BROADCAST METEOROLOGIST. NO DAMAGE OBSERVED. TORNADO LASTED LESS THAN 30 SECONDS. |
| Oct 9, 3:48 PM CDT | TORNADO | Blairstown, IA | BRIEF TOUCH DOWN NEAR BLARSTOWN. TIME ESTIMATED. |
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 |
|---|---|---|---|
| Oct 9, 1:46 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 8.1 hours before the alert went out and 144 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
- 459 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1071 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
The text
As transmitted.
025
WFUS53 KDVN 092006
TORDVN
IAC011-095-092045-
/O.NEW.KDVN.TO.W.0040.181009T2006Z-181009T2045Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
306 PM CDT TUE OCT 9 2018
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
Southern Benton County in east central Iowa...
Western Iowa County in east central Iowa...
* Until 345 PM CDT.
* At 305 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Victor, or 11 miles southwest of Marengo, moving
north at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Victor and Ladora around 315 PM CDT.
Marengo around 325 PM CDT.
Belle Plaine and Luzerne around 335 PM CDT.
Blairstown around 340 PM CDT.
Newhall, Van Horne and Keystone around 345 PM CDT.
Other locations impacted by this tornadic thunderstorm include Genoa
Bluff, Hannen Lake Park, Watkins, Koszta, Iowa County Fairgrounds,
Lake Iowa Park and Victor.
This includes Interstate 80 in Iowa between mile markers 205 and 217.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4191 9230 4205 9229 4199 9193 4156 9212
4160 9230
TIME...MOT...LOC 2005Z 195DEG 29KT 4166 9221
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Gibbs5 follow-up statements
297
WWUS53 KDVN 092010
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
310 PM CDT TUE OCT 9 2018
IAC011-095-092045-
/O.CON.KDVN.TO.W.0040.000000T0000Z-181009T2045Z/
Benton IA-Iowa IA-
310 PM CDT TUE OCT 9 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR SOUTHERN
BENTON AND WESTERN IOWA COUNTIES...
At 310 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Ladora, or 10 miles southwest of Marengo, moving
north at 30 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported a funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Ladora around 320 PM CDT.
Marengo around 330 PM CDT.
Luzerne around 340 PM CDT.
Newhall, Blairstown and Van Horne around 345 PM CDT.
Other locations impacted by this tornadic thunderstorm include Genoa
Bluff, Hannen Lake Park, Watkins, Koszta, Iowa County Fairgrounds,
Lake Iowa Park and Victor.
This includes Interstate 80 in Iowa between mile markers 205 and 217.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4191 9230 4205 9229 4199 9193 4156 9212
4160 9230
TIME...MOT...LOC 2010Z 197DEG 27KT 4168 9219
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Speck400
WWUS53 KDVN 092017
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
317 PM CDT TUE OCT 9 2018
IAC011-095-092045-
/O.CON.KDVN.TO.W.0040.000000T0000Z-181009T2045Z/
Benton IA-Iowa IA-
317 PM CDT TUE OCT 9 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR SOUTHERN
BENTON AND NORTHWESTERN IOWA COUNTIES...
At 317 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Ladora, or 9 miles southwest of Marengo, moving
north at 30 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported a funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Ladora around 325 PM CDT.
Marengo around 335 PM CDT.
Blairstown and Luzerne around 345 PM CDT.
Other locations impacted by this tornadic thunderstorm include Genoa
Bluff, Hannen Lake Park, Koszta, Iowa County Fairgrounds and Victor.
This includes Interstate 80 in Iowa between mile markers 205 and 214.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4191 9230 4205 9229 4199 9193 4163 9216
4166 9230
TIME...MOT...LOC 2017Z 197DEG 27KT 4168 9219
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Speck258
WWUS53 KDVN 092028
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
328 PM CDT TUE OCT 9 2018
IAC011-095-092045-
/O.CON.KDVN.TO.W.0040.000000T0000Z-181009T2045Z/
Benton IA-Iowa IA-
328 PM CDT TUE OCT 9 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR SOUTHERN
BENTON AND NORTHWESTERN IOWA COUNTIES...
At 327 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Ladora, or near Marengo, moving north at 35 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported a funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Blairstown and Luzerne around 340 PM CDT.
Van Horne and Keystone around 345 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Koszta, Hannen Lake Park and Iowa County Fairgrounds.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4190 9226 4204 9222 4199 9193 4171 9212
4176 9227
TIME...MOT...LOC 2027Z 195DEG 29KT 4181 9216
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Speck613
WWUS53 KDVN 092035
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
335 PM CDT TUE OCT 9 2018
IAC011-095-092045-
/O.CON.KDVN.TO.W.0040.000000T0000Z-181009T2045Z/
Benton IA-Iowa IA-
335 PM CDT TUE OCT 9 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR SOUTHERN
BENTON AND NORTHWESTERN IOWA COUNTIES...
At 335 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Marengo, moving north at 25 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported a funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Blairstown and Luzerne around 345 PM CDT.
Other locations impacted by this tornadic thunderstorm include Koszta
and Hannen Lake Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4190 9224 4204 9222 4199 9193 4176 9209
4180 9226
TIME...MOT...LOC 2035Z 196DEG 22KT 4183 9214
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Gibbs545
WWUS53 KDVN 092046
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
346 PM CDT TUE OCT 9 2018
IAC011-095-092054-
/O.EXP.KDVN.TO.W.0040.000000T0000Z-181009T2045Z/
Benton IA-Iowa IA-
346 PM CDT TUE OCT 9 2018
...THE TORNADO WARNING FOR SOUTHERN BENTON AND NORTHWESTERN IOWA
COUNTIES WILL EXPIRE AT 345 PM CDT...
The Tornado Warning that was previously in effect has been reissued
for Benton and Iowa counties and is in effect until 430 PM CDT.
Please refer to that bulletin for the latest severe weather
information.
A Tornado Watch remains in effect until 900 PM CDT for east central
Iowa.
LAT...LON 4190 9224 4204 9222 4199 9193 4176 9209
4180 9226
TIME...MOT...LOC 2044Z 195DEG 29KT 4190 9211
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 8, 7:45 PM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Linn | 90 min |
| Oct 8, 8:20 PM CDT | Tornado Warning | DVN | Keokuk | 29 min |
| Oct 8, 9:23 PM CDT | Special Weather Statement | DVN | Buchanan, Delaware | 82 min |
| Oct 8, 10:29 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa | 46 min |
| Oct 9, 2:27 AM CDT | Special Weather Statement | DVN | Benton, Buchanan | 63 min |
| Oct 9, 3:42 AM CDT | Flash Flood Watch | DVN | Clinton, Des Moines, Henry, Jackson, Lee, Louisa and 3 more | 33 hr |
| Oct 9, 11:23 AM CDT | River Flood Warning | DVN | Buchanan, Linn | 5 days |
| Oct 9, 11:26 AM CDT | River Flood Warning | DVN | Delaware, Jones | 3 days |
| Oct 9, 12:45 PM CDT | River Flood Warning | DVN | Dubuque, Jackson | 6 days |
| Oct 9, 1:31 PM CDT | River Flood Warning | DVN | Dubuque | 16 days |
| Oct 9, 2:12 PM CDT | Tornado Warning | DVN | Dubuque | 48 min |
| Oct 9, 3:09 PM CDT | Tornado Warning | DVN | Delaware | 51 min |
| Oct 9, 3:38 PM CDT | Tornado Warning | DVN | Benton, Iowa | 52 min |
| Oct 9, 4:03 PM CDT | Tornado Warning | DVN | Iowa, Keokuk, Washington | 27 min |
| Oct 9, 4:31 PM CDT | Tornado Warning | DVN | Iowa, Johnson | 44 min |
| Oct 9, 5:14 PM CDT | Tornado Warning | DVN | Benton, Iowa, Johnson, Linn | 46 min |
| Oct 9, 5:51 PM CDT | Tornado Warning | DVN | Linn | 24 min |
Nearby
Tornado Warnings in Iowa, 2018Every tornado warning in 2018Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.