Alert archive / South Dakota / Tornado Warnings in 2011
Tornado Warning 25, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Aug 14, 2011, 8:15 PM MDT for Corson County, Dewey County, South Dakota. It was in force for 30 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
- Aug 14, 2011, 8:15 PM MDT (02:15 UTC)
- Expired
- Aug 14, 2011, 8:45 PM MDT
- In force
- 30 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
Counties Corson County, SD, Dewey County, SD
The radar
The Bismarck radar (KBIS), 142 km from the middle of the area, began a volume at 02:15 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 14, 8:30 PM MDT | FUNNEL CLOUD | 5 E Trail City, SD | FUNNEL CLOUD SPOTTED 15 MILES NW NEAR LITTLE EAGLE...0.70 INCHES RAIN AND PEA HAIL |
| Aug 14, 8:30 PM MDT | HAIL 1.5 | 5 Ne Trail City, SD | PING PONG BALL SIZE HAIL AND 1.15 INCHES OF RAIN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 2.3 hours before the alert went out and 142 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
- 1399 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1398 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 7.2
The text
As transmitted, in the capitals the NWS used until 2016.
401 WFUS53 KABR 150215 TORABR SDC031-041-150245- /O.NEW.KABR.TO.W.0025.110815T0215Z-110815T0245Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ABERDEEN SD 815 PM MDT SUN AUG 14 2011 THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN CORSON COUNTY IN NORTH CENTRAL SOUTH DAKOTA... NORTH CENTRAL DEWEY COUNTY IN NORTH CENTRAL SOUTH DAKOTA... * UNTIL 845 PM MDT * AT 812 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR TRAIL CITY...OR 14 MILES WEST OF MOBRIDGE... AND MOVING SOUTH AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... TRAIL CITY. THIS WARNING INCLUDES HIGHWAY 12 BETWEEN MILE MARKERS 176 AND 181. PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW. THIS STORM HAS A HISTORY OF PRODUCING TORNADOES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! && LAT...LON 4542 10049 4540 10078 4562 10082 4563 10060 TIME...MOT...LOC 0215Z 351DEG 20KT 4552 10071 $$ SCARLETT
2 follow-up statements
936 WWUS53 KABR 150225 SVSABR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 925 PM CDT SUN AUG 14 2011 SDC031-041-150245- /O.CON.KABR.TO.W.0025.000000T0000Z-110815T0245Z/ DEWEY SD-CORSON SD- 825 PM MDT SUN AUG 14 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN CORSON AND NORTH CENTRAL DEWEY COUNTIES UNTIL 845 PM MDT... AT 821 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR TRAIL CITY...OR 13 MILES WEST OF MOBRIDGE...MOVING SOUTH AT 25 MPH. PEOPLE IN TRAIL CITY NEED TO TAKE COVER NOW! LOCATIONS IMPACTED INCLUDE... TRAIL CITY. PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW. && LAT...LON 4542 10049 4540 10078 4555 10080 4558 10062 TIME...MOT...LOC 0225Z 351DEG 20KT 4549 10070 $$ SCARLETT
749 WWUS53 KABR 150248 SVSABR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 948 PM CDT SUN AUG 14 2011 SDC031-041-150257- /O.EXP.KABR.TO.W.0025.000000T0000Z-110815T0245Z/ DEWEY SD-CORSON SD- 848 PM MDT SUN AUG 14 2011 ...THE TORNADO WARNING FOR SOUTHEASTERN CORSON AND NORTH CENTRAL DEWEY COUNTIES HAS EXPIRED... THE STORM WHICH PROMPTED THE TORNADO WARNING HAS WEAKENED. HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING STRONG GUSTY WINDS UP TO 60 MPH AND HAIL. A SEVERE THUNDERSTORM WARNING IS NOW IN EFFECT. LAT...LON 4542 10049 4540 10078 4555 10080 4558 10062 TIME...MOT...LOC 0225Z 351DEG 20KT 4549 10070 $$ SCARLETT
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 6:26 PM MDT | Severe Thunderstorm Warning | ABR | Corson | 49 min |
| Aug 14, 7:01 PM MDT | Severe Thunderstorm Warning | ABR | Corson | 59 min |
| Aug 14, 7:16 PM MDT | Tornado Warning | ABR | Corson | 29 min |
| Aug 14, 7:48 PM MDT | Tornado Warning | ABR | Corson | 27 min |
| Aug 14, 8:46 PM MDT | Severe Thunderstorm Warning | ABR | Corson, Dewey | 27 min |
| Aug 14, 10:01 PM MDT | Severe Thunderstorm Warning | ABR | Spink | 44 min |
| Aug 14, 10:25 PM MDT | Severe Thunderstorm Warning | ABR | Day | 24 min |
| Aug 15, 4:06 AM MDT | Areal Flood Warning | ABR | Roberts | 5 days |
| Aug 15, 9:42 AM MDT | Flash Flood Warning | ABR | Roberts | 7 hr |
Nearby
Tornado Warnings in South Dakota, 2011Every tornado warning in 2011Tornadoes in 2011
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.