Alert archive / South Dakota / Tornado Warnings in 2008

Tornado Warning 11, NWS Sioux Falls, SD

May 1, 2008Minnehaha County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 1, 2008, 7:59 PM CDT for Minnehaha County, South Dakota. It was in force for 14 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 1, 2008, 7:59 PM CDT (00:59 UTC)
Expired: May 1, 2008, 8:13 PM CDT
In force: 14 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon

County Minnehaha County, SD

The radar

The Sioux Falls radar (KFSD), 23 km from the middle of the area, began a volume at 00:59 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.

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 1, 4:34 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.0 hours before the alert went out and 175 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: 1220 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 338 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.

000 
WFUS53 KFSD 020058
TORFSD
SDC099-020130-
/O.NEW.KFSD.TO.W.0011.080502T0059Z-080502T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
759 PM CDT THU MAY 1 2008

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 830 PM CDT

* AT 759 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR HARTFORD...
  OR 12 MILES NORTHWEST OF SIOUX FALLS...MOVING NORTH AT 19 MPH.

* THE TORNADO WILL BE NEAR...
  RURAL MINNEHAHA COUNTY THROUGH 810 PM CDT

THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. TAKE
COVER NOW.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA.

LAT...LON 4378 9702 4378 9681 4361 9691 4362 9700
TIME...MOT...LOC 0059Z 183DEG 17KT 4364 9694

$$

LIEBL

1 follow-up statement

000 
WWUS53 KFSD 020113
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
813 PM CDT THU MAY 1 2008

SDC099-020123-
/O.CAN.KFSD.TO.W.0011.000000T0000Z-080502T0130Z/
MINNEHAHA SD-
813 PM CDT THU MAY 1 2008

...THE TORNADO WARNING FOR CENTRAL MINNEHAHA COUNTY IS CANCELLED...

THE STORM HAS WEAKENED AND IS NO LONGER SEVERE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA.

LAT...LON 4378 9702 4378 9681 4361 9691 4362 9700
TIME...MOT...LOC 0113Z 183DEG 17KT 4371 9694

$$

LIEBL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 7:08 PM CDT	Tornado Warning	FSD	Turner	29 min
May 1, 7:16 PM CDT	Severe Thunderstorm Warning	FSD	McCook, Minnehaha, Turner	44 min
May 1, 7:22 PM CDT	Tornado Warning	FSD	Lincoln, Minnehaha	23 min
May 1, 7:25 PM CDT	Tornado Warning	FSD	McCook, Minnehaha, Turner	35 min
May 1, 7:27 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha	33 min
May 1, 7:45 PM CDT	Tornado Warning	FSD	Minnehaha	30 min
May 1, 7:53 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha, Moody	24 min
May 1, 8:24 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Sanborn	36 min
May 1, 8:55 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	21 min
May 2, 2:48 PM CDT	River Flood Warning	FSD	Union	18 hr
May 2, 2:48 PM CDT	River Flood Warning	FSD	Lincoln, Union	18 hr
May 2, 3:49 PM CDT	Wind Advisory	FSD	Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 18 more	12 hr

Nearby

Tornado Warnings in South Dakota, 2008 Every tornado warning in 2008 Tornadoes in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.