Alert archive / Iowa / Tornado Warnings in 2017
Tornado Warning 13, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Jun 16, 2017, 7:51 PM CDT for Harrison County, Shelby County, Iowa. It was in force for 11 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
- Jun 16, 2017, 7:51 PM CDT (00:51 UTC)
- Expired
- Jun 16, 2017, 8:02 PM CDT
- In force
- 11 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Harrison County, IA, Shelby County, IA
The radar
The Omaha radar (KOAX), 71 km from the middle of the area, began a volume at 00:51 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 |
|---|---|---|---|
| Jun 16, 7:55 PM CDT | TSTM WND DMG | Woodbine, IA | ROOF BLOWN OFF INDUSTRIAL BUILDING. WIDESPREAD TREE DAMAGE, IN TOWN, AND WEST OF TOWN. |
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 |
|---|---|---|---|
| Jun 16, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.9 hours before the alert went out and 72 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
- 2913 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1477 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 12.6
The text
As transmitted.
997
WFUS53 KOAX 170051
TOROAX
IAC085-165-170115-
/O.NEW.KOAX.TO.W.0013.170617T0051Z-170617T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Omaha/Valley Nebraska
751 PM CDT FRI JUN 16 2017
The National Weather Service in Omaha has issued a
* Tornado Warning for...
Eastern Harrison County in southwestern Iowa...
West central Shelby County in southwestern Iowa...
* Until 815 PM CDT
* At 751 PM CDT, a severe thunderstorm capable of producing a tornado
was located 8 miles north of Logan, or 26 miles southwest of
Denison, moving southeast 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 dangerous storm will be near...
Persia around 815 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Woodbine, Schaben Park and Willow Lake Recreation Area.
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 4178 9585 4185 9575 4177 9552 4159 9553
4156 9569
TIME...MOT...LOC 0051Z 313DEG 22KT 4177 9575
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Dergan2 follow-up statements
222
WWUS53 KOAX 170058
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
758 PM CDT FRI JUN 16 2017
IAC085-165-170115-
/O.CON.KOAX.TO.W.0013.000000T0000Z-170617T0115Z/
Harrison IA-Shelby IA-
758 PM CDT FRI JUN 16 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHEASTERN HARRISON AND WEST CENTRAL SHELBY COUNTIES...
At 758 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles northeast of Logan, or 26 miles southwest of
Denison, moving southeast at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Persia around 815 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Woodbine.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4169 9578 4177 9568 4176 9553 4159 9553
4156 9569
TIME...MOT...LOC 0058Z 313DEG 28KT 4171 9568
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Dergan850
WWUS53 KOAX 170102
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
802 PM CDT FRI JUN 16 2017
IAC085-165-170111-
/O.CAN.KOAX.TO.W.0013.000000T0000Z-170617T0115Z/
Harrison IA-Shelby IA-
802 PM CDT FRI JUN 16 2017
...THE TORNADO WARNING FOR SOUTHEASTERN HARRISON AND WEST CENTRAL
SHELBY COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened and no longer
appears capable of producing a tornado.
Therefore the warning has been cancelled. However heavy rain is
still possible with this thunderstorm.
A severe thunderstorm watch remains in effect until 1000 PM CDT for
southwestern Iowa.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Omaha.
LAT...LON 4169 9578 4177 9568 4176 9553 4159 9553
4156 9569
TIME...MOT...LOC 0100Z 313DEG 22KT 4169 9566
$$
DerganThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 7:07 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona, Pottawattamie, Shelby | 38 min |
| Jun 16, 7:30 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Mills, Pottawattamie | 30 min |
| Jun 16, 7:49 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Harrison, Mills, Pottawattamie | 26 min |
| Jun 16, 8:07 PM CDT | Tornado Warning | OAX | Fremont, Mills, Montgomery | 23 min |
| Jun 16, 8:14 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more | 31 min |
| Jun 16, 8:26 PM CDT | Areal Flood Advisory | OAX | Mills, Pottawattamie | 64 min |
| Jun 16, 8:29 PM CDT | Tornado Warning | OAX | Mills, Montgomery, Pottawattamie | 31 min |
| Jun 16, 8:43 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie, Shelby | 32 min |
| Jun 16, 9:13 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Montgomery, Page | 32 min |
| Jun 16, 9:27 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 48 min |
Nearby
Tornado Warnings in Iowa, 2017Every tornado warning in 2017Tornadoes in 2017
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.