Alert archive / Iowa / Tornado Warnings in 2018
Tornado Warning 48, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 19, 2018, 4:52 PM CDT for Mahaska County, Wapello County, Iowa. It was in force for 38 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
- Jul 19, 2018, 4:52 PM CDT (21:52 UTC)
- Expired
- Jul 19, 2018, 5:30 PM CDT
- In force
- 38 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Mahaska County, IA, Wapello County, IA
The radar
The Des Moines radar (KDMX), 125 km from the middle of the area, began a volume at 21:53 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 |
|---|---|---|---|
| Jul 19, 5:12 PM CDT | TSTM WND GST 71 | 4 Se Kirkville, IA | |
| Jul 19, 5:12 PM CDT | TORNADO | 5 N Ottumwa, IA | STATE LAW ENFORCEMENT REPORTED A TORNADO A RAIN-WRAPPED TORNADO NEAR THE OTTUMWA AIRPORT. |
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 |
|---|---|---|---|
| Jul 19, 3:11 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.9 hours before the alert went out and 167 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.
563
WFUS53 KDMX 192152
TORDMX
IAC123-179-192230-
/O.NEW.KDMX.TO.W.0048.180719T2152Z-180719T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
452 PM CDT THU JUL 19 2018
The National Weather Service in Des Moines has issued a
* Tornado Warning for...
Northwestern Wapello County in southeastern Iowa...
Southeastern Mahaska County in south central Iowa...
* Until 530 PM CDT.
* At 451 PM CDT, a severe thunderstorm capable of producing a
tornado was located near Oskaloosa, moving southeast at 25 mph.
HAZARD...Tornado and quarter size hail.
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...
Eddyville around 455 PM CDT.
Ottumwa Industrial Airport around 520 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Chillicothe, Fremont, Kirkville and Oskaloosa 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 4116 9221 4104 9257 4122 9267 4132 9241
4116 9241
TIME...MOT...LOC 2151Z 313DEG 21KT 4124 9259
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
Martin2 follow-up statements
518
WWUS53 KDMX 192206
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
506 PM CDT THU JUL 19 2018
IAC123-179-192230-
/O.CON.KDMX.TO.W.0048.000000T0000Z-180719T2230Z/
Wapello IA-Mahaska IA-
506 PM CDT THU JUL 19 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHWESTERN WAPELLO AND SOUTHEASTERN MAHASKA COUNTIES...
At 505 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Kirkville, moving southeast at 30 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Ottumwa Industrial Airport around 515 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Chillicothe, Fremont, Kirkville and Oskaloosa Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4116 9221 4104 9257 4122 9267 4132 9241
4116 9241
TIME...MOT...LOC 2205Z 308DEG 24KT 4118 9248
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
Martin142
WWUS53 KDMX 192226
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
526 PM CDT THU JUL 19 2018
IAC123-179-192235-
/O.EXP.KDMX.TO.W.0048.000000T0000Z-180719T2230Z/
Wapello IA-Mahaska IA-
526 PM CDT THU JUL 19 2018
...THE TORNADO WARNING FOR NORTHWESTERN WAPELLO AND SOUTHEASTERN
MAHASKA COUNTIES WILL EXPIRE AT 530 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
Remember, a Tornado Warning still remains in effect for central and
eastern Wapello County until 600 PM CDT.
A Tornado Watch remains in effect until 1000 PM CDT for south central
and southeastern Iowa.
LAT...LON 4116 9221 4104 9257 4122 9267 4132 9241
4116 9241
TIME...MOT...LOC 2225Z 313DEG 21KT 4110 9237
$$
MartinThe 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, 3:26 PM CDT | Tornado Warning | DMX | Hamilton, Hardin, Marshall, Story | 34 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 | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.