Alert archive / Iowa / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 152, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 11, 2016, 6:17 PM CDT for Woodbury County, Iowa. It was in force for 43 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
- Aug 11, 2016, 6:17 PM CDT (23:17 UTC)
- Expired
- Aug 11, 2016, 7:00 PM CDT
- In force
- 43 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Woodbury County, IA
The radar
The Omaha radar (KOAX), 110 km from the middle of the area, began a volume at 23:19 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 |
|---|---|---|---|
| Aug 11, 6:17 PM CDT | TSTM WND DMG | Salix, IA | TREE DOWN ACROSS HIGHWAY. |
| Aug 11, 6:20 PM CDT | TSTM WND DMG | 4 Ne Salix, IA | GRAIN BIN BLOWN OVER...TIME ESTIMATED FROM RADAR. |
| Aug 11, 6:23 PM CDT | TSTM WND GST 84 | 3 N Hornick, IA | MEASURED ON PERSONAL WEATHER STATION...TIME ESTIMATED FROM RADAR. |
| Aug 11, 6:37 PM CDT | TSTM WND DMG | Smithland, IA | 7 INCH TREE BRANCHES DOWN...GAS STATION CANOPY BLOWN OVER. |
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 |
|---|---|---|---|
| Aug 11, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.3 hours before the alert went out and 110 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
- 847 J/kg
- Mixed-layer CIN
- -276 J/kg
- Mixed-layer LCL
- 1518 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 284 m²/s²
- 0-3 km storm-relative helicity
- 297 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
237
WUUS53 KFSD 112317
SVRFSD
IAC193-120000-
/O.NEW.KFSD.SV.W.0152.160811T2317Z-160812T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
617 PM CDT THU AUG 11 2016
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN WOODBURY COUNTY IN WEST CENTRAL IOWA...
* UNTIL 700 PM CDT
* AT 617 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER SERGEANT
BLUFF...OR 9 MILES SOUTH OF SIOUX CITY...MOVING EAST AT 30 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES.
* THIS SEVERE THUNDERSTORM WILL BE NEAR...
SALIX AROUND 625 PM CDT.
ANTHON AROUND 700 PM CDT.
OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE OTO AND
BRONSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 4223 9633 4224 9632 4224 9633 4226 9633
4228 9637 4232 9638 4233 9640 4235 9641
4242 9640 4245 9638 4248 9588 4221 9586
4221 9632
TIME...MOT...LOC 2317Z 266DEG 26KT 4237 9636
HAIL...<.75IN
WIND...60MPH
$$
HANKO2 follow-up statements
011
WWUS53 KFSD 112326
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
626 PM CDT THU AUG 11 2016
IAC193-120000-
/O.CON.KFSD.SV.W.0152.000000T0000Z-160812T0000Z/
WOODBURY IA-
626 PM CDT THU AUG 11 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTHWESTERN WOODBURY COUNTY...
AT 625 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR SERGEANT BLUFF TO HORNICK...MOVING EAST AT 30
MPH.
HAZARD...70 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS. AT 617 PM CDT TREE DAMAGE WAS
REPORTED NEAR SALIX.
IMPACT...EXPECT CONSIDERABLE TREE DAMAGE. DAMAGE IS LIKELY TO MOBILE
HOMES...ROOFS...AND OUTBUILDINGS.
THESE SEVERE STORMS WILL BE NEAR...
HORNICK AROUND 630 PM CDT.
SMITHLAND AROUND 645 PM CDT.
ANTHON AROUND 700 PM CDT.
OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE OTO
AND BRONSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THESE STORMS ARE PRODUCING WIND DAMAGE. SEEK SHELTER NOW INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4223 9633 4224 9632 4224 9633 4226 9633
4228 9637 4232 9638 4233 9640 4235 9641
4242 9640 4245 9638 4248 9588 4221 9586
4221 9632
TIME...MOT...LOC 2325Z 271DEG 26KT 4242 9630 4223 9610
HAIL...<.75IN
WIND...70MPH
$$
HANKO237
WWUS53 KFSD 112355
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
655 PM CDT THU AUG 11 2016
IAC193-120001-
/O.EXP.KFSD.SV.W.0152.000000T0000Z-160812T0000Z/
WOODBURY IA-
655 PM CDT THU AUG 11 2016
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WOODBURY COUNTY
WILL EXPIRE AT 700 PM CDT...
THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER GUSTY
WINDS ARE STILL POSSIBLE WITH THESE THUNDERSTORMS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR
WEST CENTRAL IOWA...AND NORTHEASTERN NEBRASKA.
REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
EASTERN WOODBURY COUNTY AND IDA COUNTY UNTIL 730 PM!
LAT...LON 4223 9633 4224 9632 4224 9633 4226 9633
4228 9637 4232 9638 4233 9640 4235 9641
4242 9640 4245 9638 4248 9588 4221 9586
4221 9632
TIME...MOT...LOC 2349Z 266DEG 26KT 4242 9630 4223 9610
$$
HANKOThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 3:15 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 30 min |
| Aug 11, 4:01 AM CDT | Flash Flood Watch | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 18 hr |
| Aug 11, 6:37 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 53 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2016Every severe thunderstorm warning in 2016
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.