Alert archive / Iowa / Tornado Warnings in 2018
Tornado Warning 40, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 19, 2018, 3:26 PM CDT for 4 counties in Iowa. It was in force for 34 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 19, 2018, 3:26 PM CDT (20:26 UTC)
- Expired
- Jul 19, 2018, 4:00 PM CDT
- In force
- 34 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Hamilton County, IA, Hardin County, IA, Marshall County, IA, Story County, IA
The radar
The Des Moines radar (KDMX), 60 km from the middle of the area, began a volume at 20:26 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 19, 3:11 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 8.4 hours before the alert went out and 242 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
- 1807 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- -21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
965
WFUS53 KDMX 192026
TORDMX
IAC079-083-127-169-192100-
/O.NEW.KDMX.TO.W.0040.180719T2026Z-180719T2100Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
326 PM CDT THU JUL 19 2018
The National Weather Service in Des Moines has issued a
* Tornado Warning for...
Northeastern Story County in central Iowa...
Southern Hardin County in central Iowa...
Northwestern Marshall County in central Iowa...
Southeastern Hamilton County in central Iowa...
* Until 400 PM CDT.
* At 325 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Roland, or 10 miles north of Nevada, 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 tornadic thunderstorm will remain over mainly rural areas of
northeastern Story...southern Hardin...northwestern Marshall and
southeastern Hamilton Counties, including the following
locations... Zearing, New Providence, Whitten, St. Anthony, Garden
City, Clemons, McCallsburg, Union, Liscomb and Eldora 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 4209 9352 4224 9355 4237 9301 4212 9300
TIME...MOT...LOC 2025Z 259DEG 47KT 4217 9343
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Johnson2 follow-up statements
606
WWUS53 KDMX 192033
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
333 PM CDT THU JUL 19 2018
IAC079-083-127-169-192100-
/O.CON.KDMX.TO.W.0040.000000T0000Z-180719T2100Z/
Story IA-Hardin IA-Marshall IA-Hamilton IA-
333 PM CDT THU JUL 19 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR
NORTHEASTERN STORY...SOUTHERN HARDIN...NORTHWESTERN MARSHALL AND
SOUTHEASTERN HAMILTON COUNTIES...
At 333 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Roland, or 11 miles north of Nevada, moving east at
25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Eldora, Roland, Hubbard, Zearing, Union, McCallsburg, Liscomb, New
Providence, Whitten, Clemons, St. Anthony, Garden City and Eldora
Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4209 9352 4224 9355 4237 9301 4212 9300
TIME...MOT...LOC 2033Z 267DEG 21KT 4218 9341
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Johnson799
WWUS53 KDMX 192044
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
344 PM CDT THU JUL 19 2018
IAC079-192053-
/O.CAN.KDMX.TO.W.0040.000000T0000Z-180719T2100Z/
Hamilton IA-
344 PM CDT THU JUL 19 2018
...THE TORNADO WARNING FOR SOUTHEASTERN HAMILTON 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 central Iowa.
LAT...LON 4210 9341 4228 9340 4237 9301 4212 9300
TIME...MOT...LOC 2043Z 259DEG 47KT 4221 9323
$$
IAC083-127-169-192100-
/O.CON.KDMX.TO.W.0040.000000T0000Z-180719T2100Z/
Story IA-Hardin IA-Marshall IA-
344 PM CDT THU JUL 19 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR
NORTHEASTERN STORY...SOUTHEASTERN HARDIN AND NORTHWESTERN MARSHALL
COUNTIES...
At 343 PM CDT, a severe thunderstorm capable of producing a tornado
was located 12 miles southwest of Eldora, moving east at 55 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Eldora, Hubbard, Zearing, Union, McCallsburg, Liscomb, New
Providence, Whitten, Clemons, St. Anthony, Garden City and Eldora
Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4210 9341 4228 9340 4237 9301 4212 9300
TIME...MOT...LOC 2043Z 259DEG 47KT 4221 9323
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
JohnsonThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 3:14 AM CDT | Special Weather Statement | DMX | Mahaska | 61 min |
| Jul 19, 12:17 PM CDT | Special Weather Statement | DMX | Emmet, Humboldt, Kossuth | 58 min |
| Jul 19, 2:41 PM CDT | Special Weather Statement | DMX | Franklin, Hamilton, Hardin, Wright | 64 min |
| Jul 19, 2:50 PM CDT | Tornado Warning | DMX | Jasper, Marshall, Polk | 25 min |
| Jul 19, 3:05 PM CDT | Tornado Warning | DMX | Franklin, Hamilton, Hardin, Wright | 40 min |
| Jul 19, 3:11 PM CDT | Tornado Warning | DMX | Jasper | 34 min |
| Jul 19, 3:22 PM CDT | Tornado Warning | DMX | Marshall, Story | 38 min |
| Jul 19, 3:37 PM CDT | Tornado Warning | DMX | Jasper, Mahaska, Marion | 23 min |
| Jul 19, 3:40 PM CDT | Tornado Warning | DMX | Franklin, Hardin | 35 min |
| Jul 19, 3:54 PM CDT | Tornado Warning | DMX | Grundy, Hardin, Marshall, Story | 51 min |
| Jul 19, 3:54 PM CDT | Tornado Warning | DMX | Jasper, Mahaska, Marion | 36 min |
| Jul 19, 4:14 PM CDT | Tornado Warning | DMX | Mahaska, Marion | 31 min |
| Jul 19, 4:18 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 42 min |
| Jul 19, 4:36 PM CDT | Tornado Warning | DMX | Mahaska, Wapello | 24 min |
| Jul 19, 4:37 PM CDT | Tornado Warning | DMX | Marshall, Tama | 23 min |
| Jul 19, 4:52 PM CDT | Tornado Warning | DMX | Mahaska, Wapello | 38 min |
| Jul 19, 4:52 PM CDT | Tornado Warning | DMX | Marshall, Poweshiek, Tama | 38 min |
| Jul 19, 5:12 PM CDT | Tornado Warning | DMX | Poweshiek, Tama | 18 min |
| Jul 19, 5:13 PM CDT | Tornado Warning | DMX | Davis, Mahaska, Wapello | 47 min |
| Jul 19, 5:55 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 20 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.