Alert archive / Iowa / Tornado Warnings in 2018
Tornado Warning 29, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Sep 3, 2018, 6:05 PM CDT for 4 counties in Iowa. It was in force for 40 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
- Sep 3, 2018, 6:05 PM CDT (23:05 UTC)
- Expired
- Sep 3, 2018, 6:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Delaware County, IA, Dubuque County, IA, Jones County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 95 km from the middle of the area, began a volume at 23:04 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 |
|---|---|---|---|
| Sep 3, 6:08 PM CDT | TORNADO | 1 Wsw Prairieburg, IA | LAW ENFORCEMENT OBSERVED A BRIEF TORNADO WITH NO VISIBLE DAMAGE. |
| Sep 3, 6:08 PM CDT | TORNADO | 2 Sw Prairieburg, IA | TORNADO TOUCHED DOWN AND THEN LIFTED BACK UP. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.1 hours before the alert went out and 98 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
- 1178 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 851 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.5
The text
As transmitted.
696
WFUS53 KDVN 032305
TORDVN
IAC055-061-105-113-032345-
/O.NEW.KDVN.TO.W.0029.180903T2305Z-180903T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
605 PM CDT MON SEP 3 2018
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
Southwestern Dubuque County in northeastern Iowa...
Northern Jones County in east central Iowa...
Southeastern Delaware County in northeastern Iowa...
Northeastern Linn County in east central Iowa...
* Until 645 PM CDT.
* At 604 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Prairieburg, or 11 miles northwest of Anamosa,
moving east at 25 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...
Langworthy around 635 PM CDT.
Monticello and Hopkinton around 640 PM CDT.
Worthington around 645 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Pinicon Ridge Park, Buck Creek, Camp Courageous, Jones County
Fairgrounds, Pictured Rocks Wildlife Area, Buffalo Creek Park, Howard
H Cherry Scout Reservation, Temple Hill and Monticello Municipal
Airport.
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 4247 9107 4222 9095 4212 9150 4228 9158
TIME...MOT...LOC 2304Z 251DEG 20KT 4222 9145
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
163 follow-up statements
266
WWUS53 KDVN 032317
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
617 PM CDT MON SEP 3 2018
IAC055-061-105-113-032345-
/O.CON.KDVN.TO.W.0029.000000T0000Z-180903T2345Z/
Dubuque IA-Jones IA-Delaware IA-Linn IA-
617 PM CDT MON SEP 3 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
SOUTHWESTERN DUBUQUE...NORTHERN JONES...SOUTHEASTERN DELAWARE AND
NORTHEASTERN LINN COUNTIES...
At 616 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Prairieburg, or 10 miles northwest of Anamosa,
moving east at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Langworthy around 630 PM CDT.
Monticello around 635 PM CDT.
Hopkinton around 640 PM CDT.
Cascade and Worthington around 645 PM CDT.
A tornado touched down 2 miles southwest of Prairieburg at 608 PM
CDT.
Other locations impacted by this tornadic thunderstorm include
Pictured Rocks Wildlife Area, Buck Creek, Camp Courageous, Jones
County Fairgrounds, Temple Hill and Monticello Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4247 9107 4222 9095 4214 9139 4231 9147
TIME...MOT...LOC 2316Z 251DEG 20KT 4224 9136
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
16551
WWUS53 KDVN 032332
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
632 PM CDT MON SEP 3 2018
IAC113-032341-
/O.CAN.KDVN.TO.W.0029.000000T0000Z-180903T2345Z/
Linn IA-
632 PM CDT MON SEP 3 2018
...THE TORNADO WARNING FOR NORTHEASTERN LINN COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1000 PM CDT for northeastern
and east central Iowa.
LAT...LON 4247 9107 4222 9095 4217 9125 4236 9132
TIME...MOT...LOC 2331Z 251DEG 20KT 4227 9125
$$
IAC055-061-105-032345-
/O.CON.KDVN.TO.W.0029.000000T0000Z-180903T2345Z/
Dubuque IA-Jones IA-Delaware IA-
632 PM CDT MON SEP 3 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
SOUTHWESTERN DUBUQUE...NORTHERN JONES AND SOUTHEASTERN DELAWARE
COUNTIES...
At 631 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Monticello, or 11 miles north of Anamosa, moving
east at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Monticello and Hopkinton around 635 PM CDT.
Cascade and Worthington around 645 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Pictured Rocks Wildlife Area, Camp Courageous, Jones County
Fairgrounds, Temple Hill and Monticello Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4247 9107 4222 9095 4217 9125 4236 9132
TIME...MOT...LOC 2331Z 251DEG 20KT 4227 9125
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
16893
WWUS53 KDVN 032344 RRA
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
644 PM CDT MON SEP 3 2018
IAC055-061-105-032354-
/O.EXP.KDVN.TO.W.0029.000000T0000Z-180903T2345Z/
Dubuque IA-Jones IA-Delaware IA-
644 PM CDT MON SEP 3 2018
...THE TORNADO WARNING FOR SOUTHWESTERN DUBUQUE...NORTHERN JONES AND
SOUTHEASTERN DELAWARE COUNTIES WILL EXPIRE AT 645 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until 1000 PM CDT for northeastern
and east central Iowa.
LAT...LON 4247 9107 4222 9095 4217 9125 4236 9132
TIME...MOT...LOC 2344Z 251DEG 20KT 4229 9118
$$
16The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 7:12 PM CDT | Special Weather Statement | DVN | Clinton | 33 min |
| Sep 2, 7:23 PM CDT | Special Weather Statement | DVN | Muscatine | 37 min |
| Sep 2, 7:34 PM CDT | Special Weather Statement | DVN | Jefferson | 56 min |
| Sep 2, 7:39 PM CDT | Flash Flood Warning | DVN | Muscatine | 2 hr |
| Sep 3, 9:19 AM CDT | River Flood Warning | DVN | Cedar, Johnson, Linn | 9 days |
| Sep 3, 10:15 AM CDT | River Flood Warning | DVN | Buchanan, Linn | 7 days |
| Sep 3, 3:53 PM CDT | Special Weather Statement | DVN | Buchanan | 67 min |
| Sep 3, 4:21 PM CDT | Special Weather Statement | DVN | Scott | 24 min |
| Sep 3, 4:41 PM CDT | Tornado Warning | DVN | Benton, Buchanan, Linn | 34 min |
| Sep 3, 5:15 PM CDT | Tornado Warning | DVN | Buchanan, Delaware, Jones, Linn | 45 min |
| Sep 3, 6:21 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 39 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.