Alert archive / South Dakota / Tornado Warnings in 2009
Tornado Warning 9, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 31, 2009, 7:10 PM CDT for Sanborn County, South Dakota. It was in force for 25 min. 2 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
- May 31, 2009, 7:10 PM CDT (00:10 UTC)
- Expired
- May 31, 2009, 7:35 PM CDT
- In force
- 25 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
County Sanborn County, SD
The radar
The Sioux Falls radar (KFSD), 110 km from the middle of the area, began a volume at 00:10 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 |
|---|---|---|---|
| May 31, 7:14 PM CDT | HAIL 1 | 3 Nnw Artesian, SD | |
| May 31, 7:25 PM CDT | HAIL 0.88 | Artesian, SD | ALSO 40 TO 50 MPH WINDS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.2 hours before the alert went out and 101 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2789 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -69 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 010010 TORFSD SDC111-010045- /O.NEW.KFSD.TO.W.0009.090601T0010Z-090601T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 710 PM CDT SUN MAY 31 2009 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... EASTERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA * UNTIL 745 PM CDT * AT 706 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 6 MILES NORTHEAST OF FORESTBURG...OR 23 MILES SOUTHEAST OF HURON...AND MOVING SOUTHEAST AT 20 MPH. * THIS TORNADIC STORM WILL BE NEAR... ARTESIAN AROUND 725 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. && LAT...LON 4407 9785 4394 9786 4406 9809 4413 9807 TIME...MOT...LOC 0010Z 300DEG 17KT 4406 9799 $$ SCHUMACHER
2 follow-up statements
000 WWUS53 KFSD 010022 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 722 PM CDT SUN MAY 31 2009 SDC111-010045- /O.CON.KFSD.TO.W.0009.000000T0000Z-090601T0045Z/ SANBORN SD- 722 PM CDT SUN MAY 31 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR EASTERN SANBORN COUNTY... AT 722 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR ARTESIAN...OR 20 MILES NORTH OF MITCHELL...MOVING EAST AT 20 MPH. THE TORNADO WILL BE NEAR... RURAL EASTERN SANBORN COUNTY THROUGH 740 PM CDT QUARTER SIZE HAIL HAS BEEN REPORTED 3 MILES NORTH-NORTHWEST OF ARTESION AT 714 PM CDT WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 4408 9797 4407 9785 4394 9786 4402 9802 TIME...MOT...LOC 0022Z 289DEG 17KT 4401 9794 $$ SCHUMACHER
000 WWUS53 KFSD 010035 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 735 PM CDT SUN MAY 31 2009 SDC111-010043- /O.CAN.KFSD.TO.W.0009.000000T0000Z-090601T0045Z/ SANBORN SD- 735 PM CDT SUN MAY 31 2009 ...THE TORNADO WARNING FOR EASTERN SANBORN COUNTY IS CANCELLED... ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN SANBORN COUNTY AND WESTERN MINER COUNTY UNTIL 745 PM CDT... QUARTER SIZE HAIL HAS BEEN REPORTED IN 3 MILES NORTH-NORTHWEST OF ARTESIAN WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. LAT...LON 4408 9797 4407 9785 4394 9786 4402 9802 TIME...MOT...LOC 0033Z 289DEG 17KT 4399 9787 $$ SCHUMACHER
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 7:13 PM CDT | Severe Thunderstorm Warning | FSD | Miner, Sanborn | 32 min |
| May 31, 7:44 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Miner, Sanborn | 31 min |
Nearby
Tornado Warnings in South Dakota, 2009Every tornado warning in 2009Tornadoes in 2009
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.