Alert archive / South Dakota / Tornado Warnings in 2007

Tornado Warning 45, NWS Sioux Falls, SD

September 30, 2007Union County, South Dakota; Sioux County, Iowa

NWS Sioux Falls, SD issued this tornado warning at Sep 30, 2007, 4:04 PM CDT for Union County, South Dakota; Sioux County, Iowa. It was in force for 41 min. 4 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: Sep 30, 2007, 4:04 PM CDT (21:04 UTC)
Expired: Sep 30, 2007, 4:45 PM CDT
In force: 41 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

Counties Sioux County, IA, Union County, SD

The radar

The Sioux Falls radar (KFSD), 58 km from the middle of the area, began a volume at 21:06 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
Sep 30, 4:20 PM CDT	HAIL 1	6 Wsw Rock Valley, IA	TORRENTIAL RAINS WITH WATER IN BASEMENT
Sep 30, 4:24 PM CDT	HAIL 0.75	6 W Rock Valley, IA
Sep 30, 4:27 PM CDT	TORNADO	5 Sw Rock Valley, IA
Sep 30, 4:30 PM CDT	HAIL 1.75	5 Sw Rock Valley, IA

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
Sep 30, 1:02 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.1 hours before the alert went out and 198 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: 1296 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 450 m²/s²
0-3 km storm-relative helicity: 472 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 302104
TORFSD
IAC167-SDC127-302145-
/O.NEW.KFSD.TO.W.0045.070930T2104Z-070930T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
404 PM CDT SUN SEP 30 2007

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL SIOUX COUNTY IN NORTHWEST IOWA
  NORTHEASTERN UNION COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 445 PM CDT

* AT 404 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER
  NORTHEASTERN UNION COUNTY...OR ABOUT NEAR HAWARDEN...MOVING
  NORTHEAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  RURAL UNION COUNTY THROUGH 430 PM CDT
  RURAL SIOUX COUNTY THROUGH 445 PM CDT

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

LAT...LON 4300 9651 4305 9658 4309 9654 4309 9647
      4314 9645 4316 9647 4322 9640 4318 9626
TIME...MOT...LOC 2104Z 214DEG 17KT 4304 9654

$$

CJ

2 follow-up statements

000 
WWUS53 KFSD 302116
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
416 PM CDT SUN SEP 30 2007

SDC127-302126-
/O.CAN.KFSD.TO.W.0045.000000T0000Z-070930T2145Z/
UNION SD-
416 PM CDT SUN SEP 30 2007

...THE TORNADO WARNING FOR NORTHEASTERN UNION COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

LAT...LON 4303 9648 4304 9650 4306 9649 4307 9647
      4314 9645 4316 9647 4322 9640 4318 9626
TIME...MOT...LOC 2116Z 209DEG 16KT 4308 9647

$$

IAC167-302145-
/O.CON.KFSD.TO.W.0045.000000T0000Z-070930T2145Z/
SIOUX IA-
416 PM CDT SUN SEP 30 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR WEST
CENTRAL SIOUX COUNTY...

AT 416 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED OVER EXTREME WEST
CENTRAL SIOUX COUNTY...OR ABOUT NEAR HAWARDEN...MOVING NORTHEAST AT
15 MPH.

THE TORNADO WILL BE NEAR...
  RURAL SIOUX COUNTY THROUGH 445 PM CDT

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

LAT...LON 4303 9648 4304 9650 4306 9649 4307 9647
      4314 9645 4316 9647 4322 9640 4318 9626
TIME...MOT...LOC 2116Z 209DEG 16KT 4308 9647

$$

CJ

000 
WWUS53 KFSD 302147
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
447 PM CDT SUN SEP 30 2007

IAC167-302157-
/O.EXP.KFSD.TO.W.0045.000000T0000Z-070930T2145Z/
SIOUX IA-
447 PM CDT SUN SEP 30 2007

...THE TORNADO WARNING FOR WEST CENTRAL SIOUX COUNTY EXPIRED AT 445
PM CDT...

THE STORM HAS WEAKENED AND EXITED THE COUNTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

LAT...LON 4303 9648 4304 9650 4306 9649 4307 9647
      4314 9645 4316 9647 4322 9640 4318 9626
TIME...MOT...LOC 2116Z 209DEG 16KT 4308 9647

$$

LIEBL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 29, 10:11 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	34 min
Sep 29, 10:32 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Douglas	28 min
Sep 29, 10:59 PM CDT	Severe Thunderstorm Warning	FSD	Davison	31 min
Sep 29, 11:08 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, McCook, Miner	37 min
Sep 29, 11:12 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Miner, Sanborn	33 min
Sep 30, 12:07 AM CDT	Severe Thunderstorm Warning	FSD	Brookings	38 min
Sep 30, 2:41 PM CDT	Severe Thunderstorm Warning	FSD	Lake	34 min
Sep 30, 3:07 PM CDT	Severe Thunderstorm Warning	FSD	Clay	38 min
Sep 30, 3:11 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Moody	36 min
Sep 30, 3:23 PM CDT	Severe Thunderstorm Warning	FSD	Union	37 min
Sep 30, 3:26 PM CDT	Tornado Warning	FSD	Clay	34 min
Sep 30, 3:44 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Moody	31 min
Sep 30, 3:54 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	36 min
Sep 30, 3:56 PM CDT	Severe Thunderstorm Warning	FSD	Clay	34 min
Sep 30, 4:01 PM CDT	Severe Thunderstorm Warning	FSD	Union	14 min
Sep 30, 4:36 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	39 min
Sep 30, 4:41 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Sioux	40 min
Sep 30, 4:44 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	31 min
Sep 30, 5:09 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	36 min
Sep 30, 5:12 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	33 min
Sep 30, 5:30 PM CDT	Tornado Warning	FSD	Plymouth	30 min
Sep 30, 5:32 PM CDT	Severe Thunderstorm Warning	FSD	Ida	28 min
Sep 30, 5:42 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	48 min
Sep 30, 5:52 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	38 min
Sep 30, 5:54 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	36 min
Sep 30, 5:59 PM CDT	Tornado Warning	FSD	Ida	8 min
Sep 30, 6:20 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	25 min
Sep 30, 6:26 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	16 min

Nearby

Tornado Warnings in South Dakota, 2007 Tornado Warnings in Iowa, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.