Alert archive / South Dakota / Tornado Warnings in 2010
Tornado Warning 49, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Aug 30, 2010, 6:11 PM CDT for Davison County, Sanborn County, South Dakota. It was in force for 24 min. 3 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 30, 2010, 6:11 PM CDT (23:11 UTC)
- Expired
- Aug 30, 2010, 6:35 PM CDT
- In force
- 24 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
Counties Davison County, SD, Sanborn County, SD
The radar
The Sioux Falls radar (KFSD), 123 km from the middle of the area, began a volume at 23:12 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 30, 6:12 PM CDT | TSTM WND GST 70 | 7 Nnw Mount Vernon, SD | HAIL TO THE SIZE OF QUARTERS |
| Aug 30, 6:20 PM CDT | TSTM WND GST 80 | 2 Wsw Letcher, SD | 5 GRAIN BINS DESTROYED. TREES 2 TO 3 FEET IN DIAMETER UPROOTED. DAMAGE EXTENDS TO W SIDE OF LETCHER. |
| Aug 30, 6:38 PM CDT | TSTM WND GST 70 | 2 Nw Forestburg, SD |
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 30, 3:23 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.2 hours before the alert went out and 112 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
- 357 J/kg
- Mixed-layer CIN
- -450 J/kg
- Mixed-layer LCL
- 1401 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 199 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
838 WFUS53 KFSD 302311 TORFSD SDC035-111-302345- /O.NEW.KFSD.TO.W.0049.100830T2311Z-100830T2345Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 611 PM CDT MON AUG 30 2010 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN DAVISON COUNTY IN SOUTHEAST SOUTH DAKOTA... SOUTHERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA... * UNTIL 645 PM CDT * AT 611 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR MOUNT VERNON...OR 10 MILES WEST OF MITCHELL...AND MOVING NORTHEAST AT 50 MPH. * THIS TORNADIC STORM WILL BE NEAR... LETCHER AROUND 620 PM CDT... FORESTBURG AROUND 630 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN EFFECT FOR THE SAME AREA. GO TO A BASEMENT OR SMALL INTERIOR ROOM ON THE LOWEST FLOOR! && LAT...LON 4405 9829 4403 9792 4369 9816 4370 9833 TIME...MOT...LOC 2311Z 208DEG 43KT 4379 9820 $$ SCHUMACHER
2 follow-up statements
490 WWUS53 KFSD 302316 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 616 PM CDT MON AUG 30 2010 SDC035-111-302345- /O.CON.KFSD.TO.W.0049.000000T0000Z-100830T2345Z/ SANBORN SD-DAVISON SD- 616 PM CDT MON AUG 30 2010 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN DAVISON AND SOUTHERN SANBORN COUNTIES UNTIL 645 PM CDT... AT 616 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR LOOMIS...OR 9 MILES NORTHWEST OF MITCHELL... MOVING NORTHEAST AT 50 MPH. THIS DANGEROUS STORM WILL BE NEAR... LETCHER AROUND 625 PM CDT... FORESTBURG AROUND 630 PM CDT... IN ADDITION TO THE TORNADO..THIS STORM IS CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL AND WINDS EXCESS OF 70 MPH. LAT...LON 4376 9812 4378 9832 4405 9829 4403 9792 TIME...MOT...LOC 2316Z 208DEG 43KT 4384 9816 $$ SCHUMACHER
502 WWUS53 KFSD 302335 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 635 PM CDT MON AUG 30 2010 SDC035-111-302344- /O.CAN.KFSD.TO.W.0049.000000T0000Z-100830T2345Z/ SANBORN SD-DAVISON SD- 635 PM CDT MON AUG 30 2010 ...THE TORNADO WARNING FOR NORTHWESTERN DAVISON AND SOUTHERN SANBORN COUNTIES IS CANCELLED... ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SANBORN COUNTY UNTIL 700 PM CDT... THE STORM WHICH PROMPTED THE WARNING IS NO LONGER EXPECTED TO PRODUCE A TORNADO. HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING QUARTER SIZE HAIL AND WINDS IN EXCESS OF 60 MPH. LAT...LON 4376 9812 4378 9832 4405 9829 4403 9792 TIME...MOT...LOC 2334Z 208DEG 43KT 4403 9802 $$ SCHUMACHER
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 5:09 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 36 min |
| Aug 30, 5:31 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix, Gregory | 29 min |
| Aug 30, 5:42 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 33 min |
| Aug 30, 5:57 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix, Douglas | 33 min |
| Aug 30, 6:06 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison, Sanborn | 24 min |
| Aug 30, 6:26 PM CDT | Severe Thunderstorm Warning | FSD | Sanborn | 34 min |
| Aug 30, 6:31 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 29 min |
| Aug 30, 6:36 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix, Davison, Douglas | 39 min |
| Aug 30, 6:44 PM CDT | Severe Thunderstorm Warning | FSD | Beadle, Kingsbury, Miner, Sanborn | 46 min |
| Aug 30, 6:57 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Douglas, Hutchinson | 33 min |
Nearby
Tornado Warnings in South Dakota, 2010Every tornado warning in 2010Tornadoes in 2010
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.