Alert archive / Iowa / Tornado Warnings in 2008
Tornado Warning 5, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 1, 2008, 6:54 PM CDT for Lyon County, Sioux County, Iowa; Rock County, Minnesota; Lincoln County, Minnehaha County, South Dakota. It was in force for 36 min. 9 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
- May 1, 2008, 6:54 PM CDT (23:54 UTC)
- Expired
- May 1, 2008, 7:30 PM CDT
- In force
- 36 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
Counties Lyon County, IA, Sioux County, IA, Rock County, MN, Lincoln County, SD, Minnehaha County, SD
The radar
The Sioux Falls radar (KFSD), 36 km from the middle of the area, began a volume at 23:55 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 |
|---|---|---|---|
| May 1, 6:55 PM CDT | TORNADO | 5 Wsw Sioux Center, IA | |
| May 1, 6:59 PM CDT | TORNADO | Sioux Center, IA | JUST NORTH OF SIOUX CENTER |
| May 1, 7:07 PM CDT | TORNADO | Rock Valley, IA | |
| May 1, 7:08 PM CDT | TORNADO | 2 Se Inwood, IA | |
| May 1, 7:10 PM CDT | TORNADO | 1 S Rock Valley, IA | |
| May 1, 7:12 PM CDT | TORNADO | Rock Valley, IA | TORNADO ON THE WEST SIDE OF TOWN NOW, MOVING NORTH. POWER LINES ARE DOWN IN THE PATH OF THE STORM. |
| May 1, 7:25 PM CDT | TORNADO | Inwood, IA | |
| May 1, 7:30 PM CDT | TORNADO | 1 E Doon, IA | |
| May 1, 7:30 PM CDT | TORNADO | 4 Sw Rock Rapids, IA | TORNADO VISIBLE FROM HWY 9 BETWEEN LESTER AND ROCK RAPIDS, ABOUT 6 MILES SOUTH. |
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 |
|---|---|---|---|
| May 1, 4:34 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.9 hours before the alert went out and 228 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
- 468 J/kg
- Mixed-layer CIN
- -587 J/kg
- Mixed-layer LCL
- 694 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 390 m²/s²
- 0-3 km storm-relative helicity
- 460 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 012355 TORFSD IAC119-167-MNC133-SDC083-099-020030- /O.NEW.KFSD.TO.W.0005.080501T2354Z-080502T0030Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 654 PM CDT THU MAY 1 2008 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... LYON COUNTY IN NORTHWEST IOWA SIOUX COUNTY IN NORTHWEST IOWA NORTHERN LINCOLN COUNTY IN SOUTHEAST SOUTH DAKOTA SOUTHEASTERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA SOUTHWESTERN ROCK COUNTY IN SOUTHWEST MINNESOTA * UNTIL 730 PM CDT * AT 654 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES SOUTHEAST OF FAIRVIEW...OR 11 MILES SOUTHEAST OF CANTON...MOVING NORTH AT 33 MPH. * THE TORNADO WILL BE NEAR... INWOOD...CANTON...HULL AROUND 700 PM CDT... DOON...HARRISBURG AROUND 710 PM CDT... ALVORD AROUND 715 PM CDT... LARCHWOOD AROUND 720 PM CDT... LESTER...ROCK RAPIDS...ROWENA AROUND 725 PM CDT... SPOTTERS HAVE REPORTED MULTIPLE TORNADOES IN A LINE OF THUNDERSTORMS. IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IMMEDIATELY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH DAKOTA. LAT...LON 4358 9657 4339 9588 4297 9614 4331 9685 TIME...MOT...LOC 2354Z 202DEG 29KT 4321 9642 $$ LIEBL
5 follow-up statements
000 WWUS53 KFSD 020001 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 659 PM CDT THU MAY 1 2008 IAC119-167-MNC133-SDC083-099-020030- /O.CON.KFSD.TO.W.0005.000000T0000Z-080502T0030Z/ LYON IA-SIOUX IA-ROCK MN-MINNEHAHA SD-LINCOLN SD- 659 PM CDT THU MAY 1 2008 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR NORTHERN LINCOLN...SOUTHEASTERN MINNEHAHA...SOUTHWESTERN ROCK...SIOUX AND LYON COUNTIES... AT 659 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A NUMBER OF TORNADOES IN A LINE OF THUNDERSTORMS FROM NEAR CANTON SOUTH DAKOTA...SOUTHEAST TO SIOUX CENTER IOWA. THESE TORNADO WAS LOCATED 4 MILES EAST OF FAIRVIEW...OR 10 MILES SOUTHEAST OF CANTON...MOVING NORTH AT 33 MPH. THE TORNADO WILL BE NEAR... INWOOD AROUND 705 PM CDT... DOON...HARRISBURG AROUND 710 PM CDT... ALVORD AROUND 715 PM CDT... LARCHWOOD AROUND 720 PM CDT... LESTER...ROCK RAPIDS...ROWENA...GEORGE AROUND 725 PM CDT... A TORNADO HAS BEEN CONFIRMED. TAKE COVER IN A STURDY BUILDING NOW. MOBILE HOMES AND VEHICLES ARE NOT SAFE. IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IMMEDIATELY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH DAKOTA. LAT...LON 4358 9657 4339 9588 4297 9614 4331 9685 TIME...MOT...LOC 2359Z 202DEG 29KT 4325 9640 $$ LIEBL
000
WWUS53 KFSD 020005 RRB
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
704 PM CDT THU MAY 1 2008
IAC119-167-MNC133-SDC083-099-020030-
/O.CON.KFSD.TO.W.0005.000000T0000Z-080502T0030Z/
LYON IA-SIOUX IA-ROCK MN-MINNEHAHA SD-LINCOLN SD-
704 PM CDT THU MAY 1 2008
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR NORTHERN
LINCOLN...SOUTHEASTERN MINNEHAHA...SOUTHWESTERN ROCK...SIOUX AND LYON
COUNTIES...
AT 704 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF STORMS CAPLABLE OF PRODUCING TORNADO. THIS
TORNADO WAS LOCATED 6 MILES WEST OF SIOUX CENTER...OR 12 MILES
NORTHEAST OF HAWARDEN...MOVING NORTH AT 31 MPH. AT 7 PM CDT...A HALF
MILE WIDE TORNADOE WAS REPORTED 5 MILES SOUTHEAST OF ROCK VALLEY A
HALF MILE WIDE TORNADOE WAS REPORTED
THE TORNADO WILL BE NEAR...
HULL AROUND 710 PM CDT...
FAIRVIEW AROUND 720 PM CDT...
DOON...INWOOD AROUND 725 PM CDT...
ALVORD...LESTER...CANTON...GEORGE AROUND 730 PM CDT...
A TORNADO HAS BEEN CONFIRMED. TAKE COVER IN A STURDY BUILDING NOW.
MOBILE HOMES AND VEHICLES ARE NOT SAFE.
IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IMMEDIATELY.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA.
LAT...LON 4297 9615 4331 9685 4348 9669 4350 9665
4352 9664 4354 9660 4356 9660 4358 9657
4339 9589
TIME...MOT...LOC 0004Z 174DEG 27KT 4313 9629
$$
LIEBL000
WWUS53 KFSD 020013
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
712 PM CDT THU MAY 1 2008
IAC119-167-MNC133-SDC083-099-020030-
/O.CON.KFSD.TO.W.0005.000000T0000Z-080502T0030Z/
LYON IA-SIOUX IA-ROCK MN-MINNEHAHA SD-LINCOLN SD-
712 PM CDT THU MAY 1 2008
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR NORTHERN
LINCOLN...SOUTHEASTERN MINNEHAHA...SOUTHWESTERN ROCK...SIOUX AND LYON
COUNTIES...
AT 712 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF TORNADO PRODUCING STORMS. THESE TORNADO PRODUCING
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 4 MILES NORTH OF
CANTON TO INWOOD TO ROCK VALLEY TO SIOUX CENTER...OR ALONG A LINE
EXTENDING FROM CANTON TO 6 MILES EAST OF CANTON TO 16 MILES SOUTH OF
ROCK RAPIDS TO 9 MILES NORTHWEST OF ORANGE CITY...MOVING NORTH AT 42
MPH.
TORNADO PRODUCING STORMS WILL BE NEAR...
DOON AROUND 715 PM CDT...
LARCHWOOD...ALVORD AROUND 720 PM CDT...
LESTER...ROWENA AROUND 725 PM CDT...
ROCK RAPIDS...GEORGE AROUND 730 PM CDT...
AT 710 PM CDT...WEATHER SPOTTERS REPORTED A LARGE TORNADO NORTH OF
ROCK VALLEY. DAMAGE HAS BEEN REPORTED WITH THIS STORM. IF YOU ARE IN
DOON...YOU NEED TO TAKE COVER NOW.
A TORNADO HAS BEEN CONFIRMED. TAKE COVER IN A STURDY BUILDING NOW.
MOBILE HOMES AND VEHICLES ARE NOT SAFE.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA.
LAT...LON 4297 9615 4331 9685 4348 9669 4350 9665
4352 9664 4354 9660 4356 9660 4358 9657
4339 9589
TIME...MOT...LOC 0012Z 186DEG 36KT 4340 9660 4337 9645
4326 9628 4315 9615
$$
PS000
WWUS53 KFSD 020019
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
717 PM CDT THU MAY 1 2008
IAC119-167-MNC133-SDC083-099-020030-
/O.CON.KFSD.TO.W.0005.000000T0000Z-080502T0030Z/
LYON IA-SIOUX IA-ROCK MN-MINNEHAHA SD-LINCOLN SD-
717 PM CDT THU MAY 1 2008
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR NORTHERN
LINCOLN...SOUTHEASTERN MINNEHAHA...SOUTHWESTERN ROCK...SIOUX AND LYON
COUNTIES...
AT 717 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 HARRISBURG TO 6 MILES
NORTHEAST OF CANTON TO DOON TO HULL...OR ALONG A LINE EXTENDING FROM
9 MILES NORTHWEST OF CANTON TO 6 MILES NORTHEAST OF CANTON TO 13
MILES SOUTHWEST OF ROCK RAPIDS TO 11 MILES NORTHWEST OF ORANGE
CITY...MOVING NORTH AT 42 MPH.
TORNADO PRODUCING STORMS WILL BE NEAR...
LESTER...LARCHWOOD...ROWENA AROUND 725 PM CDT...
ROCK RAPIDS...GEORGE AROUND 730 PM CDT...
AT 715 PM CDT...TRAINED SPOTTERS REPORTED A TORNADO ABOUT 1 MILE
WEST OF DOON. ANOTHER TORNADO WAS REPORTED IN ROCK VALLEY WITH
DAMAGE REPORTED AT 707 PM.
RADAR INDICATED A THAT A TORNADIC CIRCULATION WAS DEVELOP 2 MILES
SOUTH OF HARRISBURG AT 7187 PMC.
IF YOU ARE ALVORD...ROCK RAPIDS OR HARRISBURG TAKE COVER NOW.
A TORNADO HAS BEEN CONFIRMED. TAKE COVER IN A STURDY BUILDING NOW.
MOBILE HOMES AND VEHICLES ARE NOT SAFE.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA.
LAT...LON 4297 9615 4331 9685 4348 9669 4350 9665
4352 9664 4354 9660 4356 9660 4358 9657
4339 9589
TIME...MOT...LOC 0017Z 186DEG 36KT 4345 9668 4342 9651
4331 9627 4320 9614
$$
PS000
WWUS53 KFSD 020030
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
728 PM CDT THU MAY 1 2008
IAC119-167-MNC133-SDC083-099-020038-
/O.EXP.KFSD.TO.W.0005.000000T0000Z-080502T0030Z/
LYON IA-SIOUX IA-ROCK MN-MINNEHAHA SD-LINCOLN SD-
728 PM CDT THU MAY 1 2008
...THE TORNADO WARNING FOR SOUTHERN SIOUX COUNTY EXPIRES AT 730 PM
CDT...
...A TORNADO WARNING IS EFFECT UNTIL 745 PM CDT FOR EASTERN
MINNEHAHA COUNTY...NORTHEASTERN LINCOLN COUNTY...LYON COUNTY...NORTH
CENTRAL SIOUX COUNTY...SOUTHERN ROCK COUNTY...AND SOUTHWESTERN
NOBLES COUNTY.
LAT...LON 4297 9615 4331 9685 4348 9669 4350 9665
4352 9664 4354 9660 4356 9660 4358 9657
4339 9589
TIME...MOT...LOC 0028Z 186DEG 36KT 4356 9666 4353 9649
4342 9625 4331 9612
$$
PSThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 4:47 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 43 min |
| May 1, 5:16 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Hutchinson, Yankton | 29 min |
| May 1, 5:21 PM CDT | Severe Thunderstorm Warning | FSD | Yankton | 39 min |
| May 1, 5:47 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson | 43 min |
| May 1, 5:48 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison, Douglas | 42 min |
| May 1, 5:57 PM CDT | Severe Thunderstorm Warning | FSD | Yankton | 33 min |
| May 1, 6:13 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, Turner | 47 min |
| May 1, 6:18 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Hutchinson | 42 min |
| May 1, 6:26 PM CDT | Severe Thunderstorm Warning | FSD | Davison | 34 min |
| May 1, 6:36 PM CDT | Tornado Warning | FSD | Turner | 24 min |
| May 1, 6:52 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 38 min |
Nearby
Tornado Warnings in Iowa, 2008Tornado Warnings in South Dakota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.