Alert archive / Iowa / Tornado Warnings in 2018
Tornado Warning 39, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 19, 2018, 3:22 PM CDT for Marshall County, Story County, Iowa. It was in force for 38 min. 1 report 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, 3:22 PM CDT (20:22 UTC)
- Expired
- Jul 19, 2018, 4:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Marshall County, IA, Story County, IA
The radar
The Des Moines radar (KDMX), 63 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 19, 3:37 PM CDT | TORNADO | 2 E Collins, IA | LOCATION APPROXIMATE. |
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, 8.4 hours before the alert went out and 211 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.
996
WFUS53 KDMX 192022
TORDMX
IAC127-169-192100-
/O.NEW.KDMX.TO.W.0039.180719T2022Z-180719T2100Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
322 PM CDT THU JUL 19 2018
The National Weather Service in Des Moines has issued a
* Tornado Warning for...
Southeastern Story County in central Iowa...
Southern Marshall County in central Iowa...
* Until 400 PM CDT.
* At 322 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles northwest of Baxter, or 13 miles southeast of
Nevada, 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.
* This dangerous storm will be near...
State Center around 330 PM CDT.
Marshalltown around 345 PM CDT.
Other locations impacted by this tornadic thunderstorm include Le
Grand, Collins, Rhodes, Ferguson, Laurel, Green Mountain, Haverhill
and Melbourne.
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 4186 9292 4186 9332 4198 9336 4213 9277
4189 9277
TIME...MOT...LOC 2022Z 254DEG 47KT 4191 9324
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Donavon2 follow-up statements
373
WWUS53 KDMX 192038
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
338 PM CDT THU JUL 19 2018
IAC127-169-192100-
/O.CON.KDMX.TO.W.0039.000000T0000Z-180719T2100Z/
Story IA-Marshall IA-
338 PM CDT THU JUL 19 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR
SOUTHEASTERN STORY AND SOUTHERN MARSHALL COUNTIES...
At 338 PM CDT, a confirmed tornado was located near Baxter, or 14
miles southeast of Nevada, moving east at 30 mph.
HAZARD...Damaging tornado.
SOURCE...Law enforcement confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornado will be near...
State Center around 350 PM CDT.
Other locations impacted by this tornadic thunderstorm include Le
Grand, Collins, Rhodes, Ferguson, Laurel, Green Mountain, Haverhill
and Melbourne.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 4186 9292 4186 9332 4198 9336 4213 9277
4189 9277
TIME...MOT...LOC 2038Z 254DEG 26KT 4190 9323
TORNADO...OBSERVED
HAIL...<.75IN
$$
Johnson099
WWUS53 KDMX 192052
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
352 PM CDT THU JUL 19 2018
IAC127-169-192102-
/O.EXP.KDMX.TO.W.0039.000000T0000Z-180719T2100Z/
Story IA-Marshall IA-
352 PM CDT THU JUL 19 2018
...THE TORNADO WARNING FOR SOUTHEASTERN STORY AND SOUTHERN MARSHALL
COUNTIES WILL EXPIRE AT 400 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until 1000 PM CDT for central Iowa.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Des Moines .
LAT...LON 4186 9292 4186 9332 4198 9336 4213 9277
4189 9277
TIME...MOT...LOC 2052Z 254DEG 47KT 4195 9300
$$
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, 3:26 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.