Alert archive / Iowa / Tornado Warnings in 2008
Tornado Warning 12, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 1, 2008, 8:16 PM CDT for Lyon County, O'Brien County, Osceola County, Iowa; Nobles County, Minnesota. It was in force for 29 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, 8:16 PM CDT (01:16 UTC)
- Expired
- May 1, 2008, 8:45 PM CDT
- In force
- 29 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
Counties Lyon County, IA, O'Brien County, IA, Osceola County, IA, Nobles County, MN
The radar
The Sioux Falls radar (KFSD), 87 km from the middle of the area, began a volume at 01:16 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
Minneapolis, MN (KMPX), launched 00:00Z, 1.3 hours before the alert went out and 219 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1402 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 399 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS53 KFSD 020116
TORFSD
IAC119-141-143-MNC105-020145-
/O.NEW.KFSD.TO.W.0012.080502T0116Z-080502T0145Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
816 PM CDT THU MAY 1 2008
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* TORNADO WARNING FOR...
NORTHEASTERN LYON COUNTY IN NORTHWEST IOWA
NORTHEASTERN OBRIEN COUNTY IN NORTHWEST IOWA
OSCEOLA COUNTY IN NORTHWEST IOWA
NOBLES COUNTY IN SOUTHWEST MINNESOTA
* UNTIL 845 PM CDT
* AT 816 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO ALONG A
LINE EXTENDING FROM 6 MILES NORTH OF LITTLE ROCK TO 5 MILES
NORTHEAST OF HARTLEY...OR ALONG A LINE EXTENDING FROM 15 MILES
NORTHEAST OF ROCK RAPIDS TO 14 MILES NORTHWEST OF SPENCER...MOVING
NORTH AT 35 MPH.
* TORNADO PRODUCING STORMS WILL BE NEAR...
ADRIAN...OCHEYEDAN...BIGELOW AROUND 825 PM CDT...
RUSHMORE AROUND 830 PM CDT...
LISMORE AROUND 835 PM CDT...
WORTHINGTON...WILMONT...ROUND LAKE AROUND 840 PM CDT...
BREWSTER AROUND 845 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 4384 9594 4372 9545 4350 9546 4332 9540
4307 9541 4349 9598
TIME...MOT...LOC 0116Z 188DEG 32KT 4357 9591 4326 9539
$$
SCHUMACHER3 follow-up statements
000
WWUS53 KFSD 020128
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
826 PM CDT THU MAY 1 2008
IAC119-141-020136-
/O.CAN.KFSD.TO.W.0012.000000T0000Z-080502T0145Z/
LYON IA-OBRIEN IA-
826 PM CDT THU MAY 1 2008
...THE TORNADO WARNING FOR NORTHEASTERN OBRIEN AND NORTHEASTERN LYON
COUNTIES IS CANCELLED...
THE STORMS HAVE MOVED OUT OF THESE COUNTIES.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA.
LAT...LON 4325 9540 4327 9565 4349 9587 4350 9587
4350 9588 4357 9596 4384 9594 4372 9545
4348 9546 4332 9540
TIME...MOT...LOC 0126Z 188DEG 32KT 4366 9589 4335 9537
$$
IAC143-MNC105-020145-
/O.CON.KFSD.TO.W.0012.000000T0000Z-080502T0145Z/
OSCEOLA IA-NOBLES MN-
826 PM CDT THU MAY 1 2008
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR NOBLES
AND OSCEOLA COUNTIES...
AT 826 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF TORNADO PRODUCING STORMS. THESE TORNADO PRODUCING
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM ADRIAN TO 10 MILES
SOUTHEAST OF OCHEYEDAN...OR ALONG A LINE EXTENDING FROM 15 MILES WEST
OF WORTHINGTON TO 14 MILES SOUTHWEST OF SPIRIT LAKE...MOVING NORTH AT
37 MPH.
TORNADO PRODUCING STORMS WILL BE NEAR...
LISMORE AROUND 835 PM CDT...
WORTHINGTON...WILMONT...ROUND LAKE AROUND 840 PM CDT...
BREWSTER AROUND 845 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 4325 9540 4327 9565 4349 9587 4350 9587
4350 9588 4357 9596 4384 9594 4372 9545
4348 9546 4332 9540
TIME...MOT...LOC 0126Z 188DEG 32KT 4366 9589 4335 9537
$$
SCHUMACHER000
WWUS53 KFSD 020140
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
840 PM CDT THU MAY 1 2008
IAC143-MNC105-020145-
/O.CON.KFSD.TO.W.0012.000000T0000Z-080502T0145Z/
OSCEOLA IA-NOBLES MN-
840 PM CDT THU MAY 1 2008
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
SOUTHEASTERN NOBLES AND EASTERN OSCEOLA COUNTIES...
AT 840 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR OCHEYEDAN...OR 14
MILES SOUTH OF WORTHINGTON...MOVING NORTH AT 28 MPH.
THE TORNADO WILL BE NEAR...
ROUND LAKE AROUND 845 PM CDT...
AT 738 PM CDT...A WEATHER SPOTTER REPORTED A FUNNEL CLOUDY 1 MILE
NORTH OF OCHEYDON ALONG HIGHWAY 59.
THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. TAKE
COVER NOW.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA.
LAT...LON 4325 9540 4327 9565 4349 9571 4368 9564
4372 9545 4350 9546 4333 9540
TIME...MOT...LOC 0140Z 196DEG 24KT 4344 9552
$$
PS000
WWUS53 KFSD 020146
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
844 PM CDT THU MAY 1 2008
IAC143-MNC105-020154-
/O.EXP.KFSD.TO.W.0012.000000T0000Z-080502T0145Z/
OSCEOLA IA-NOBLES MN-
844 PM CDT THU MAY 1 2008
...THE TORNADO WARNING FOR SOUTHEASTERN NOBLES AND EASTERN OSCEOLA
COUNTIES WILL EXPIRE AT 845 PM CDT...
THE STORM IS NO LONGER SEVERE. HOWEVER...THIS STORM IS CAPABLE OF
PRODUCING BRIEF HEAVY RAIN AND PEA SIZE HAIL AS IT MOVE ALONG THE
JACKSON AND NOBLES COUNTY.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA.
LAT...LON 4325 9540 4327 9565 4349 9571 4368 9564
4372 9545 4350 9546 4333 9540
TIME...MOT...LOC 0144Z 196DEG 24KT 4347 9551
$$
SCHUMACHERThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 7:22 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 23 min |
| May 1, 7:39 PM CDT | Tornado Warning | FSD | Lyon, O'Brien, Osceola | 36 min |
| May 1, 7:45 PM CDT | Tornado Warning | FSD | Lyon | 30 min |
| May 2, 2:48 PM CDT | River Flood Warning | FSD | Plymouth | 18 hr |
| May 2, 2:48 PM CDT | River Flood Warning | FSD | Clay, Dickinson | 7 days |
| May 2, 2:48 PM CDT | River Flood Warning | FSD | Buena Vista | 7 days |
| May 2, 2:48 PM CDT | River Flood Warning | FSD | Sioux | 18 hr |
| May 2, 3:49 PM CDT | Wind Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 12 hr |
| May 1, 7:58 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 26 min |
Nearby
Tornado Warnings in Iowa, 2008Tornado Warnings in Minnesota, 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.