Alert archive / Iowa / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 147, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 11, 2016, 3:15 AM CDT for 4 counties in Iowa. It was in force for 30 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
- Aug 11, 2016, 3:15 AM CDT (08:15 UTC)
- Expired
- Aug 11, 2016, 3:45 AM CDT
- In force
- 30 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA
The radar
The Sioux Falls radar (KFSD), 83 km from the middle of the area, began a volume at 08:14 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, 3:26 AM CDT | TSTM WND DMG | Hull, IA | MULTIPLE TREES DOWNED BLOCKING THE ROADWAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 8.3 hours before the alert went out and 200 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
- 812 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 1483 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 157 m²/s²
- 0-3 km storm-relative helicity
- 311 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.8
The text
As transmitted.
932
WUUS53 KFSD 110815
SVRFSD
IAC119-141-143-167-110845-
/O.NEW.KFSD.SV.W.0147.160811T0815Z-160811T0845Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
315 AM CDT THU AUG 11 2016
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN LYON COUNTY IN NORTHWESTERN IOWA...
WESTERN O'BRIEN COUNTY IN NORTHWESTERN IOWA...
NORTHEASTERN SIOUX COUNTY IN NORTHWESTERN IOWA...
SOUTHWESTERN OSCEOLA COUNTY IN NORTHWESTERN IOWA...
* UNTIL 345 AM CDT
* AT 315 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM ALVORD TO NEAR ROCK VALLEY...MOVING EAST AT 40 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES.
* SEVERE THUNDERSTORMS WILL BE NEAR... SIOUX CENTER...HULL AND DOON
AROUND 325 AM CDT. GEORGE AROUND 335 AM CDT. ORANGE CITY AND
BOYDEN AROUND 340 AM CDT. SHELDON...ALTON...HOSPERS...GRANVILLE
AND MATLOCK AROUND 345 AM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 4291 9576 4310 9639 4340 9640 4334 9575
4291 9573
TIME...MOT...LOC 0815Z 285DEG 35KT 4332 9632 4316 9631
HAIL...<.75IN
WIND...60MPH
$$
BT2 follow-up statements
170
WWUS53 KFSD 110829
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
329 AM CDT THU AUG 11 2016
IAC119-141-143-167-110845-
/O.CON.KFSD.SV.W.0147.000000T0000Z-160811T0845Z/
LYON IA-O'BRIEN IA-SIOUX IA-OSCEOLA IA-
329 AM CDT THU AUG 11 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 AM CDT
FOR SOUTHEASTERN LYON...WESTERN O'BRIEN...NORTHEASTERN SIOUX AND
SOUTHWESTERN OSCEOLA COUNTIES...
AT 329 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR GEORGE TO NEAR HULL TO NEAR SIOUX CENTER...MOVING
EAST AT 40 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES.
THESE SEVERE STORMS WILL BE NEAR...
ORANGE CITY AND BOYDEN AROUND 335 AM CDT.
ALTON AND MATLOCK AROUND 340 AM CDT.
SHELDON...HOSPERS...ASHTON AND GRANVILLE AROUND 345 AM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 4291 9576 4306 9625 4332 9623 4334 9575
4291 9573
TIME...MOT...LOC 0829Z 290DEG 35KT 4330 9609 4316 9610 4307 9613
HAIL...<.75IN
WIND...60MPH
$$
BT020
WWUS53 KFSD 110845
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
345 AM CDT THU AUG 11 2016
IAC119-141-143-167-110855-
/O.EXP.KFSD.SV.W.0147.000000T0000Z-160811T0845Z/
LYON IA-O'BRIEN IA-SIOUX IA-OSCEOLA IA-
345 AM CDT THU AUG 11 2016
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LYON...WESTERN
O'BRIEN...NORTHEASTERN SIOUX AND SOUTHWESTERN OSCEOLA COUNTIES HAS
EXPIRED...
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING HAS BEEN ALLOWED TO EXPIRE. HOWEVER GUSTY
WINDS ARE STILL POSSIBLE WITH THESE THUNDERSTORMS.
LAT...LON 4291 9576 4306 9625 4332 9623 4334 9575
4291 9573
TIME...MOT...LOC 0843Z 285DEG 35KT 4330 9609 4316 9610 4307 9613
$$
BTThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 4:01 AM CDT | Flash Flood Watch | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 18 hr |
| Aug 11, 6:17 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 43 min |
| 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.