Alert archive / Iowa / Tornado Warnings in 2020
Tornado Warning 10, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at May 26, 2020, 2:22 PM CDT for Poweshiek County, Tama County, Iowa. It was in force for 38 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
- May 26, 2020, 2:22 PM CDT (19:22 UTC)
- Expired
- May 26, 2020, 3:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Poweshiek County, IA, Tama County, IA
The radar
The Des Moines radar (KDMX), 116 km from the middle of the area, began a volume at 19:21 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 |
|---|---|---|---|
| May 26, 1:20 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.4 hours before the alert went out and 159 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
- 332 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 1121 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
092
WFUS53 KDMX 261922
TORDMX
IAC157-171-262000-
/O.NEW.KDMX.TO.W.0010.200526T1922Z-200526T2000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
222 PM CDT Tue May 26 2020
The National Weather Service in Des Moines has issued a
* Tornado Warning for...
Northeastern Poweshiek County in central Iowa...
Southeastern Tama County in central Iowa...
* Until 300 PM CDT.
* At 222 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Belle Plaine, or 13 miles west of Marengo, moving
north at 40 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 Poweshiek and southeastern Tama Counties, including
the following locations... Chelsea, Elberon, Vining and Clutier.
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 4184 9237 4213 9247 4215 9230 4184 9230
TIME...MOT...LOC 1922Z 170DEG 35KT 4187 9232
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Kotenberg3 follow-up statements
163
WWUS53 KDMX 261934
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
234 PM CDT Tue May 26 2020
IAC157-261944-
/O.CAN.KDMX.TO.W.0010.000000T0000Z-200526T2000Z/
Poweshiek IA-
234 PM CDT Tue May 26 2020
...THE TORNADO WARNING FOR NORTHEASTERN POWESHIEK COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 800 PM CDT for central Iowa.
LAT...LON 4193 9240 4213 9247 4215 9230 4194 9230
TIME...MOT...LOC 1934Z 170DEG 35KT 4199 9235
$$
IAC171-262000-
/O.CON.KDMX.TO.W.0010.000000T0000Z-200526T2000Z/
Tama IA-
234 PM CDT Tue May 26 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
SOUTHEASTERN TAMA COUNTY...
At 234 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles northwest of Belle Plaine, or 11 miles east of
Toledo, moving north at 40 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...
Clutier, Elberon and Vining.
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 4193 9240 4213 9247 4215 9230 4194 9230
TIME...MOT...LOC 1934Z 170DEG 35KT 4199 9235
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Martin853
WWUS53 KDMX 261944
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
244 PM CDT Tue May 26 2020
IAC171-262000-
/O.CON.KDMX.TO.W.0010.000000T0000Z-200526T2000Z/
Tama IA-
244 PM CDT Tue May 26 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR EAST
CENTRAL TAMA COUNTY...
At 244 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Dysart, or 12 miles northeast of Toledo, moving
north at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Clutier.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4213 9247 4215 9230 4202 9230 4201 9243
TIME...MOT...LOC 1944Z 170DEG 35KT 4209 9237
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Martin088
WWUS53 KDMX 261951
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
251 PM CDT Tue May 26 2020
IAC171-262001-
/O.EXP.KDMX.TO.W.0010.000000T0000Z-200526T2000Z/
Tama IA-
251 PM CDT Tue May 26 2020
...THE TORNADO WARNING FOR EAST CENTRAL TAMA COUNTY WILL EXPIRE AT
300 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However gusty winds and heavy rain are still
possible with this thunderstorm.
A Tornado Watch remains in effect until 800 PM CDT for central Iowa.
LAT...LON 4213 9247 4215 9230 4202 9230 4201 9243
TIME...MOT...LOC 1951Z 170DEG 35KT 4213 9238
$$
MartinThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 1:25 PM CDT | Tornado Warning | DMX | Dallas | 35 min |
| May 26, 1:49 PM CDT | Tornado Warning | DMX | Boone, Dallas | 26 min |
| May 26, 2:25 PM CDT | Tornado Warning | DMX | Boone, Webster | 35 min |
| May 26, 3:47 PM CDT | Tornado Warning | DMX | Humboldt, Wright | 13 min |
| May 26, 3:57 PM CDT | Tornado Warning | DMX | Audubon, Guthrie | 21 min |
| May 26, 4:23 PM CDT | Special Weather Statement | DMX | Mahaska | 22 min |
| May 26, 5:16 PM CDT | Tornado Warning | DMX | Franklin, Wright | 29 min |
| May 26, 6:09 PM CDT | Special Weather Statement | DMX | Cerro Gordo, Worth | 51 min |
| May 26, 6:30 PM CDT | Severe Thunderstorm Warning | DMX | Worth | 30 min |
Nearby
Tornado Warnings in Iowa, 2020Every tornado warning in 2020Tornadoes in 2020
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.