Alert archive / Iowa / Tornado Warnings in 2018
Tornado Warning 36, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 19, 2018, 2:50 PM CDT for Jasper County, Marshall County, Polk County, Iowa. It was in force for 25 min. 4 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, 2:50 PM CDT (19:50 UTC)
- Expired
- Jul 19, 2018, 3:15 PM CDT
- In force
- 25 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Jasper County, IA, Marshall County, IA, Polk County, IA
The radar
The Des Moines radar (KDMX), 30 km from the middle of the area, began a volume at 19:53 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, 2:58 PM CDT | TORNADO | 3 N Bondurant, IA | HIGHWAY 65 AND JUST NORTH OF BONDURANT. |
| Jul 19, 2:58 PM CDT | TORNADO | 4 Nne Bondurant, IA | SEVERAL REPORTS OF THIS TORNADO. |
| Jul 19, 2:58 PM CDT | TORNADO | 4 Nne Bondurant, IA | METEOROLOGIST REPORTS MACHINE SHED DESTROYED WITH PINE TREES/POWER LINES OVER THE ROAD NEAR THIS LOCATION. TIME ESTIMATED. |
| Jul 19, 3:01 PM CDT | TORNADO | 2 Se Valeria, IA | WELL DEFINED CONE. |
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, 7.8 hours before the alert went out and 238 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.
176
WFUS53 KDMX 191950
TORDMX
IAC099-127-153-192015-
/O.NEW.KDMX.TO.W.0036.180719T1950Z-180719T2015Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
250 PM CDT THU JUL 19 2018
The National Weather Service in Des Moines has issued a
* Tornado Warning for...
Northeastern Polk County in central Iowa...
Southwestern Marshall County in central Iowa...
Northwestern Jasper County in central Iowa...
* Until 315 PM CDT.
* At 250 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bondurant, or 7 miles north of Altoona, moving
east at 30 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported 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...
Colfax around 310 PM CDT.
Other locations impacted by this tornadic thunderstorm include Mingo
and Valeria.
This includes Interstate 80 between mile markers 155 and 158.
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 4172 9348 4179 9350 4187 9318 4167 9317
TIME...MOT...LOC 1950Z 264DEG 26KT 4176 9343
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Martin2 follow-up statements
657
WWUS53 KDMX 191957
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
257 PM CDT THU JUL 19 2018
IAC099-127-153-192015-
/O.CON.KDMX.TO.W.0036.000000T0000Z-180719T2015Z/
Polk IA-Marshall IA-Jasper IA-
257 PM CDT THU JUL 19 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR
NORTHEASTERN POLK...SOUTHWESTERN MARSHALL AND NORTHWESTERN JASPER
COUNTIES...
At 257 PM CDT, a confirmed tornado was located north of Bondurant,
or 10 miles northeast of Altoona, moving east at 30 mph.
HAZARD...Damaging tornado.
SOURCE...Radar confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Colfax around 310 PM CDT.
Other locations impacted by this tornadic thunderstorm include Mingo
and Valeria.
This includes Interstate 80 between mile markers 155 and 158.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 4172 9348 4179 9350 4187 9318 4167 9317
TIME...MOT...LOC 1957Z 264DEG 26KT 4177 9336
TORNADO...OBSERVED
HAIL...<.75IN
$$
Martin301
WWUS53 KDMX 192001
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
301 PM CDT THU JUL 19 2018
IAC099-127-153-192015-
/O.CON.KDMX.TO.W.0036.000000T0000Z-180719T2015Z/
Polk IA-Marshall IA-Jasper IA-
301 PM CDT THU JUL 19 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR
NORTHEASTERN POLK...SOUTHWESTERN MARSHALL AND NORTHWESTERN JASPER
COUNTIES...
At 301 PM CDT, a confirmed tornado was located 5 miles northeast of
Mitchellville, or 12 miles northeast of Altoona, moving east at 30
mph.
HAZARD...Damaging tornado and half dollar size hail.
SOURCE...Radar confirmed tornado.
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 tornado will be near...
Colfax around 310 PM CDT.
Other locations impacted by this tornadic thunderstorm include Mingo
and Valeria.
This includes Interstate 80 between mile markers 155 and 158.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. 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 4171 9343 4180 9344 4187 9318 4167 9317
TIME...MOT...LOC 2001Z 264DEG 26KT 4177 9332
TORNADO...OBSERVED
HAIL...1.25IN
$$
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, 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 | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.