Alert archive / Iowa / Tornado Warnings in 2008

Tornado Warning 48, NWS Sioux Falls, SD

July 6, 2008Plymouth County, Iowa

NWS Sioux Falls, SD issued this tornado warning at Jul 6, 2008, 5:11 PM CDT for Plymouth County, Iowa. It was in force for 34 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
Jul 6, 2008, 5:11 PM CDT (22:11 UTC)
Expired
Jul 6, 2008, 5:45 PM CDT
In force
34 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon

County Plymouth County, IA

The radar

The Sioux Falls radar (KFSD), 111 km from the middle of the area, began a volume at 22:13 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.

IssuedProductOfficeLasted
Jul 6, 3:05 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.2 hours before the alert went out and 157 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2008-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2155 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2008-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2155 J/kg
Mixed-layer CIN
-356 J/kg
Mixed-layer LCL
1374 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFSD 062212
TORFSD
IAC149-062245-
/O.NEW.KFSD.TO.W.0048.080706T2211Z-080706T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
511 PM CDT SUN JUL 6 2008

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

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

* UNTIL 545 PM CDT

* AT 511 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR HINTON...OR
  10 MILES NORTHEAST OF SIOUX CITY...MOVING EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
   KINGSLEY AROUND 535 PM CDT...
   REMSEN AROUND 545 PM CDT...

THIS TORNADO WARNING REPLACES THE PREVIOUS TORNADO WARNING ISSUED 
FOR THE AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SUNDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND
NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

LAT...LON 4286 9588 4257 9588 4257 9633 4270 9638
TIME...MOT...LOC 2211Z 251DEG 26KT 4263 9626

$$
RSR
2 follow-up statements
000 
WWUS53 KFSD 062227
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
527 PM CDT SUN JUL 6 2008

IAC149-062245-
/O.CON.KFSD.TO.W.0048.000000T0000Z-080706T2245Z/
PLYMOUTH IA-
527 PM CDT SUN JUL 6 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
SOUTHEASTERN PLYMOUTH COUNTY...

AT 527 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 3 MILES EAST OF
HINTON...OR 11 MILES SOUTH OF LE MARS...MOVING NORTHEAST AT 16 MPH.

THE TORNADO WILL BE NEAR...
  RURAL PLYMOUTH COUNTY THROUGH 540 PM CDT

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SUNDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND
NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

LAT...LON 4286 9588 4257 9588 4257 9633 4270 9638
TIME...MOT...LOC 2227Z 239DEG 13KT 4265 9621

$$
RSR
000 
WWUS53 KFSD 062243
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
543 PM CDT SUN JUL 6 2008

IAC149-062253-
/O.EXP.KFSD.TO.W.0048.000000T0000Z-080706T2245Z/
PLYMOUTH IA-
543 PM CDT SUN JUL 6 2008

...THE TORNADO WARNING FOR SOUTHEASTERN PLYMOUTH COUNTY WILL EXPIRE
AT 545 PM CDT...

THE STORM IS NO LONGER SEVERE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SUNDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND
NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

LAT...LON 4286 9588 4257 9588 4257 9633 4270 9638
TIME...MOT...LOC 2243Z 239DEG 13KT 4268 9614

$$
RSR

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 3:52 PM CDTSevere Thunderstorm WarningFSDWoodbury38 min
Jul 6, 4:02 PM CDTSevere Thunderstorm WarningFSDBuena Vista43 min
Jul 6, 4:29 PM CDTSevere Thunderstorm WarningFSDWoodbury46 min
Jul 6, 4:34 PM CDTFlash Flood WarningFSDCherokee, Woodbury116 min
Jul 6, 4:41 PM CDTFlash Flood WarningFSDBuena Vista, Cherokee, Ida100 min
Jul 6, 4:41 PM CDTTornado WarningFSDPlymouth, Woodbury34 min
Jul 6, 5:05 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida, Plymouth, Woodbury40 min
Jul 6, 5:14 PM CDTFlash Flood WarningFSDBuena Vista, Cherokee, Plymouth86 min

Nearby

Tornado Warnings in Iowa, 2008Every tornado warning in 2008Tornadoes 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.