Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 9, NWS Sioux Falls, SD

May 10, 20154 counties in South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 10, 2015, 12:28 PM CDT for 4 counties in South Dakota. It was in force for 32 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: May 10, 2015, 12:28 PM CDT (17:28 UTC)
Expired: May 10, 2015, 1:00 PM CDT
In force: 32 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Davison County, SD, Hanson County, SD, Miner County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 95 km from the middle of the area, began a volume at 17:30 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 10, 12:35 PM CDT	HAIL 1.5	6 Ne Mitchell, 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
May 10, 10:46 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 5.5 hours before the alert went out and 130 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 483 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 389 m²/s²
0-3 km storm-relative helicity: 692 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

091 
WFUS53 KFSD 101728
TORFSD
SDC035-061-097-111-101800-
/O.NEW.KFSD.TO.W.0009.150510T1728Z-150510T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1228 PM CDT SUN MAY 10 2015

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN DAVISON COUNTY IN SOUTHEASTERN SOUTH DAKOTA...
  SOUTHEASTERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  SOUTHWESTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHWESTERN HANSON COUNTY IN SOUTHEASTERN SOUTH DAKOTA...

* UNTIL 100 PM CDT
    
* AT 1228 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR FULTON...OR NEAR MITCHELL...MOVING NORTH
  AT 30 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. 
           DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE 
           DAMAGE IS LIKELY. 

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  NORTHEASTERN DAVISON...SOUTHEASTERN SANBORN...SOUTHWESTERN MINER
  AND NORTHWESTERN HANSON COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4367 9782 4371 9806 4397 9798 4396 9768
TIME...MOT...LOC 1728Z 194DEG 24KT 4377 9791 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

BT

3 follow-up statements

083 
WWUS53 KFSD 101731
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1231 PM CDT SUN MAY 10 2015

SDC035-061-097-111-101800-
/O.CON.KFSD.TO.W.0009.000000T0000Z-150510T1800Z/
DAVISON SD-SANBORN SD-MINER SD-HANSON SD-
1231 PM CDT SUN MAY 10 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR
NORTHEASTERN DAVISON...SOUTHEASTERN SANBORN...SOUTHWESTERN MINER AND
NORTHWESTERN HANSON COUNTIES...
        
AT 1230 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A 
TORNADO WAS LOCATED NEAR FULTON...OR 5 MILES NORTHEAST OF 
MITCHELL...MOVING NORTH AT 30 MPH.

HAZARD...TORNADO AND QUARTER SIZE HAIL. 

SOURCE...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD NEAR THE JAMES 
RIVER EAST OF MITCHELL . 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE 
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE DAMAGE IS 
         LIKELY. 

LOCATIONS IMPACTED INCLUDE...
MITCHELL AND FULTON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4367 9782 4371 9806 4397 9798 4396 9768
TIME...MOT...LOC 1730Z 194DEG 24KT 4379 9790 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BT

042 
WWUS53 KFSD 101745
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1245 PM CDT SUN MAY 10 2015

SDC035-061-097-111-101800-
/O.CON.KFSD.TO.W.0009.000000T0000Z-150510T1800Z/
DAVISON SD-SANBORN SD-MINER SD-HANSON SD-
1245 PM CDT SUN MAY 10 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR
NORTHEASTERN DAVISON...SOUTHEASTERN SANBORN...SOUTHWESTERN MINER AND
NORTHWESTERN HANSON COUNTIES...
        
AT 1245 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 9 MILES NORTH OF FULTON...OR 12 MILES NORTHEAST OF
MITCHELL...MOVING NORTH AT 35 MPH.

HAZARD...TORNADO AND QUARTER SIZE HAIL. 

SOURCE...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE 
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE DAMAGE IS 
         LIKELY. 

LOCATIONS IMPACTED INCLUDE...
MITCHELL AND FULTON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4367 9782 4371 9806 4397 9798 4396 9768
TIME...MOT...LOC 1745Z 195DEG 31KT 4387 9787 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BT

207 
WWUS53 KFSD 101750
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1250 PM CDT SUN MAY 10 2015

SDC035-061-097-111-101800-
/O.EXP.KFSD.TO.W.0009.000000T0000Z-150510T1800Z/
DAVISON SD-SANBORN SD-MINER SD-HANSON SD-
1250 PM CDT SUN MAY 10 2015

...THE TORNADO WARNING FOR NORTHEASTERN DAVISON...SOUTHEASTERN
SANBORN...SOUTHWESTERN MINER AND NORTHWESTERN HANSON COUNTIES WILL
EXPIRE AT 100 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER SMALL HAIL
IS STILL POSSIBLE WITH THIS THUNDERSTORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FOR SOUTHEASTERN
SOUTH DAKOTA.

LAT...LON 4367 9782 4371 9806 4397 9798 4396 9768
TIME...MOT...LOC 1749Z 194DEG 24KT 4387 9787 

$$

BT

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 9:54 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas	36 min
May 10, 10:16 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas, Hutchinson	29 min
May 10, 10:29 AM CDT	Tornado Warning Tornado observed	FSD	Charles Mix, Douglas, Hutchinson	31 min
May 10, 10:55 AM CDT	Tornado Warning Tornado observed	FSD	Davison, Douglas, Hutchinson	35 min
May 10, 11:23 AM CDT	Tornado Warning	FSD	Davison, Hanson, Hutchinson	37 min
May 10, 11:55 AM CDT	Tornado Warning	FSD	Davison, Hanson, Sanborn	35 min
May 10, 12:27 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	33 min
May 10, 1:40 PM CDT	Severe Thunderstorm Warning	FSD	Union	35 min
May 10, 1:57 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, McCook, Turner	33 min
May 10, 2:02 PM CDT	Severe Thunderstorm Warning	FSD	Union	28 min
May 10, 2:51 PM CDT	Tornado Warning	FSD	Lincoln, Union	24 min
May 10, 3:15 PM CDT	Severe Thunderstorm Warning	FSD	Union	30 min
May 10, 3:27 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	33 min
May 10, 4:34 PM CDT	Flash Flood Warning	FSD	Lincoln	4 hr
May 10, 4:56 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Sanborn	34 min

Nearby

Tornado Warnings in South Dakota, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.