Tornado Warning 15, NWS Sioux Falls, SD

Issued

Apr 9, 2011, 11:39 PM CDT (04:39 UTC)

Expired

Apr 10, 2011, 12:00 AM CDT

In force

21 min

Issued by

NWS Sioux Falls, SD

Area

Storm-based polygon

County Clay County, IA

The Sioux Falls radar (KFSD), 155 km from the middle of the area, began a volume at 04:40 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.

059 
WFUS53 KFSD 100439
TORFSD
IAC041-100500-
/O.NEW.KFSD.TO.W.0015.110410T0439Z-110410T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1139 PM CDT SAT APR 9 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN CLAY COUNTY IN NORTHWEST IOWA...

* UNTIL MIDNIGHT CDT

* AT 1139 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
  DANGEROUS STORM WAS LOCATED NEAR WEBB...OR 13 MILES SOUTH OF
  SPENCER...AND MOVING NORTHEAST AT 40 MPH.

* THIS TORNADIC STORM WILL AFFECT MAINLY RURAL AREAS OF SOUTHEASTERN
  CLAY COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4292 9504 4296 9507 4304 9511 4312 9492
      4308 9491 4292 9491
TIME...MOT...LOC 0439Z 239DEG 34KT 4298 9502

$$

CJ

411 
WWUS53 KFSD 100446
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1146 PM CDT SAT APR 9 2011

IAC041-100500-
/O.CON.KFSD.TO.W.0015.000000T0000Z-110410T0500Z/
CLAY IA-
1146 PM CDT SAT APR 9 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL CLAY COUNTY
UNTIL MIDNIGHT CDT...

AT 1146 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
DANGEROUS STORM WAS LOCATED 6 MILES NORTHEAST OF WEBB...OR 14 MILES
SOUTHEAST OF SPENCER...MOVING NORTHEAST AT 40 MPH.

THIS TORNADO WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL CLAY
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4294 9491 4294 9501 4297 9504 4305 9506
      4312 9492 4308 9491
TIME...MOT...LOC 0446Z 239DEG 34KT 4302 9493

$$

CJ

351 
WWUS53 KFSD 100452
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1152 PM CDT SAT APR 9 2011

IAC041-100502-
/O.EXP.KFSD.TO.W.0015.000000T0000Z-110410T0500Z/
CLAY IA-
1152 PM CDT SAT APR 9 2011

...THE TORNADO WARNING FOR EAST CENTRAL CLAY COUNTY WILL EXPIRE AT
MIDNIGHT CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 4294 9491 4294 9501 4297 9504 4305 9506
      4312 9492 4308 9491
TIME...MOT...LOC 0452Z 239DEG 34KT 4304 9486

$$

CJ

Tornado Warnings in Iowa, 2011Every tornado warning in 2011Tornadoes in 2011

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.