Alert archive / Iowa / Tornado Warnings in 2018
Tornado Warning 30, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Sep 5, 2018, 2:27 PM CDT for Lee County, Iowa. It was in force for 22 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
- Sep 5, 2018, 2:27 PM CDT (19:27 UTC)
- Expired
- Sep 5, 2018, 2:49 PM CDT
- In force
- 22 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Lee County, IA
The radar
The Quad Cities radar (KDVN), 144 km from the middle of the area, began a volume at 19:30 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, 7.5 hours before the alert went out and 149 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
- 152 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 981 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
842
WFUS53 KDVN 051927
TORDVN
IAC111-052000-
/O.NEW.KDVN.TO.W.0030.180905T1927Z-180905T2000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
227 PM CDT WED SEP 5 2018
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
Northwestern Lee County in southeastern Iowa...
* Until 300 PM CDT.
* At 226 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Croton, or 10 miles north of Kahoka, moving east
at 15 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...
Donnellson around 255 PM CDT.
Montrose, Franklin and New Boston around 300 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Charleston, Pollmiller Park, Wilson Lake, Lee County Fairgrounds,
Shimek State Forest, Argyle and Battle of Athens Campground.
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 4054 9162 4055 9168 4056 9169 4058 9169
4060 9172 4063 9172 4072 9143 4053 9141
4053 9162
TIME...MOT...LOC 1926Z 255DEG 13KT 4057 9167
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Sheets2 follow-up statements
199
WWUS53 KDVN 051941
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
241 PM CDT WED SEP 5 2018
IAC111-052000-
/O.CON.KDVN.TO.W.0030.000000T0000Z-180905T2000Z/
Lee IA-
241 PM CDT WED SEP 5 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
NORTHWESTERN LEE COUNTY...
At 241 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Donnellson, or 11 miles west of Nauvoo, moving east
at 15 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Donnellson around 250 PM CDT.
Franklin and New Boston around 300 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Charleston, Wilson Lake, Lee County Fairgrounds and Pollmiller Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.
&&
LAT...LON 4056 9162 4059 9165 4064 9161 4072 9143
4056 9141 4055 9160
TIME...MOT...LOC 1941Z 255DEG 13KT 4058 9160
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Sheets224
WWUS53 KDVN 051949
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
249 PM CDT WED SEP 5 2018
IAC111-051958-
/O.CAN.KDVN.TO.W.0030.000000T0000Z-180905T2000Z/
Lee IA-
249 PM CDT WED SEP 5 2018
...THE TORNADO WARNING FOR NORTHWESTERN LEE COUNTY IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However heavy rain is
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 4056 9162 4059 9165 4064 9161 4072 9143
4056 9141 4055 9160
TIME...MOT...LOC 1947Z 255DEG 13KT 4059 9157
$$
SheetsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 12:36 PM CDT | Special Weather Statement | DVN | Johnson | 69 min |
| Sep 5, 1:01 PM CDT | Flash Flood Warning | DVN | Benton, Iowa, Johnson, Linn | 6 hr |
| Sep 5, 3:50 PM CDT | River Flood Warning | DVN | Johnson, Louisa, Washington | 4 days |
| Sep 5, 3:50 PM CDT | River Flood Warning | DVN | Johnson, Washington | 5 days |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.