Alert archive / Iowa / Tornado Watches in 2004
Tornado Watch 332
The Storm Prediction Center issued this tornado watch at May 30, 2004, 12:25 PM CDT for 14 counties in Illinois; 43 counties in Iowa; 5 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 30, 2004, 12:25 PM CDT (17:25 UTC)
- Expired
- May 30, 2004, 7:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 62 counties
Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Davis County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hardin County, IA, Henry County, IA, Howard County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Mahaska County, IA, Marshall County, IA, Mitchell County, IA, Muscatine County, IA, Poweshiek County, IA, Scott County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Winneshiek County, IA, Worth County, IA, Bureau County, IL, Carroll County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Knox County, IL, Marshall County, IL, Mercer County, IL, Peoria County, IL, Rock Island County, IL, Stark County, IL, Warren County, IL, Whiteside County, IL, Woodford County, IL, Crawford County, WI, Grant County, WI, Iowa County, WI, Lafayette County, WI, Richland County, WI
The radar
The Quad Cities radar (KDVN), 90 km from the middle of the area, began a volume at 17:25 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.
Warnings issued inside it
35 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 2:04 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Wapello | 41 min |
| May 30, 2:18 PM CDT | Severe Thunderstorm Warning | DVN | Lee | 42 min |
| May 30, 2:29 PM CDT | Tornado Warning | DVN | Lee | 46 min |
| May 30, 2:45 PM CDT | Tornado Warning | DVN | Henderson | 45 min |
| May 30, 2:47 PM CDT | Flash Flood Warning | DVN | Lee | 5 hr |
| May 30, 3:09 PM CDT | Flash Flood Warning | DVN | Jefferson, Keokuk, Washington | 5 hr |
| May 30, 3:11 PM CDT | Tornado Warning | DVN | Hancock, McDonough, Warren | 49 min |
| May 30, 3:26 PM CDT | Tornado Warning | DVN | Benton, Buchanan, Linn | 64 min |
| May 30, 3:32 PM CDT | Severe Thunderstorm Warning | DVN | Johnson, Washington | 58 min |
| May 30, 3:36 PM CDT | Flash Flood Warning | ARX | Clayton | 4 hr |
| May 30, 3:41 PM CDT | Tornado Warning | DVN | Dubuque, Jones | 49 min |
| May 30, 3:45 PM CDT | Tornado Warning | ILX | Fulton, Knox | 60 min |
| May 30, 3:52 PM CDT | Tornado Warning | DVN | Iowa, Johnson | 53 min |
| May 30, 3:57 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 48 min |
| May 30, 3:58 PM CDT | Tornado Warning | DVN | Delaware | 62 min |
| May 30, 4:03 PM CDT | Tornado Warning | DVN | McDonough, Warren | 27 min |
| May 30, 4:03 PM CDT | Tornado Warning | DVN | Cedar, Muscatine | 42 min |
| May 30, 4:12 PM CDT | Flash Flood Warning | DVN | Buchanan, Delaware, Dubuque, Jones, Linn | 63 min |
| May 30, 4:18 PM CDT | Tornado Warning | DVN | Dubuque | 57 min |
| May 30, 4:21 PM CDT | Flash Flood Warning | ILX | Knox | 6 hr |
| May 30, 4:25 PM CDT | Flash Flood Warning | DVN | Buchanan, Delaware, Dubuque, Jones, Linn | 4 hr |
| May 30, 4:28 PM CDT | Severe Thunderstorm Warning | ILX | Peoria, Stark | 62 min |
| May 30, 4:29 PM CDT | Tornado Warning | ILX | Peoria, Stark | 61 min |
| May 30, 4:36 PM CDT | Tornado Warning | ILX | Tazewell, Woodford | 54 min |
| May 30, 4:40 PM CDT | Flash Flood Warning | ILX | Peoria, Stark | 6 hr |
| May 30, 4:43 PM CDT | Tornado Warning | ILX | Fulton, Knox | 62 min |
| May 30, 4:44 PM CDT | Tornado Warning | DVN | Cedar, Scott | 46 min |
| May 30, 4:48 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 57 min |
| May 30, 4:51 PM CDT | Flash Flood Warning | DVN | Bureau, Henry, Putnam | 54 min |
| May 30, 4:51 PM CDT | Flash Flood Warning | DVN | Bureau, Henry, Putnam | 3 hr |
| May 30, 4:54 PM CDT | Tornado Warning | DVN | Bureau, Whiteside | 51 min |
| May 30, 5:10 PM CDT | Tornado Warning | ILX | Marshall | 65 min |
| May 30, 5:19 PM CDT | Tornado Warning | ILX | Woodford | 56 min |
| May 30, 5:22 PM CDT | Severe Thunderstorm Warning | DVN | Delaware | 28 min |
| May 30, 5:24 PM CDT | Flash Flood Warning | ILX | Marshall, Woodford | 6 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 5.4 hours before the alert went out and 319 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
- 1629 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 569 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 201 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 8.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 301729
SEL2
SPC WW 301725
IAZ000-ILZ000-WIZ000-310000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 332
NWS STORM PREDICTION CENTER NORMAN OK
1225 PM CDT SUN MAY 30 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL AND EASTERN IOWA
NORTHWEST ILLINOIS
SOUTHWEST WISCONSIN
EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1225 PM UNTIL 700
PM CDT.
...THIS IS A PARTICULARLY DANGEROUS SITUATION...
DESTRUCTIVE TORNADOES...LARGE HAIL TO 2 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 65 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 90 STATUTE MILES EAST AND WEST
OF A LINE FROM 70 MILES NORTH NORTHEAST OF WATERLOO IOWA TO 20
MILES SOUTHEAST OF BURLINGTON IOWA.
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 329...WW 330...WW 331...
DISCUSSION...SUPERCELLS EXPECTED TO DEVELOP IN THE NEXT HOUR OR SO
IN LOW LEVEL CONFLUENCE ZONE AHEAD OF DEVELOPING NRN MO SURFACE
WAVE. SURFACE HEATING COUPLED WITH FAVORABLY TIMED WITH
STRENGTHENING LARGE SCALE ASCENT SUGGEST POTENTIAL FOR A STRONG
TORNADO OR TWO IN ADDITION TO HAIL...ESPECIALLY IN SE IA.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 55 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 22025.
...CORFIDI
432,0900 403,0890 403,0923 432,0934SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 7:40 AM CDT | Tornado Watch | SPC | Adams, Brown, Cass, Champaign, Christian, Coles and 31 more | 5 hr |
| May 30, 9:40 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Greene, Hancock and 6 more | 3 hr |
| May 30, 10:04 AM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Clinton, Edwards, Franklin, Gallatin and 19 more | 2 hr |
| May 30, 10:50 AM CDT | Tornado Watch | SPC | Adams, Brown, Hancock, McDonough, Pike | 8 hr |
| May 30, 11:04 AM CDT | Mesoscale Discussion | SPC | Champaign, Cook, DeWitt, Douglas, DuPage, Iroquois and 4 more | 116 min |
| May 30, 11:50 AM CDT | Tornado Watch | SPC | Clark, Crawford, Edgar, Edwards, Gallatin, Hardin and 7 more | 7 hr |
| May 30, 12:13 PM CDT | Mesoscale Discussion | SPC | Carroll, Hancock, Henderson, Henry, Jo Daviess, Knox and 4 more | 2 hr |
| May 30, 12:53 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Christian, Fulton and 13 more | 2 hr |
| May 30, 1:05 PM CDT | Tornado Watch | SPC | Alexander, Bond, Calhoun, Cass, Champaign, Christian and 45 more | 6 hr |
| May 30, 3:16 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cass, DeKalb, DuPage and 29 more | 119 min |
| May 30, 4:25 PM CDT | Tornado Watch | SPC | Boone, Cook, DeKalb, DuPage, Grundy, Iroquois and 12 more | 6 hr |
| May 30, 5:10 PM CDT | Mesoscale Discussion | SPC | Alexander, Bond, Clinton, Fayette, Jackson, Madison and 7 more | 95 min |
| May 30, 5:36 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cass, Champaign, Christian and 39 more | 54 min |
| May 30, 6:40 PM CDT | Tornado Watch | SPC | Alexander, Bond, Champaign, Christian, Clark, Clay and 41 more | 6 hr |
| May 30, 6:55 PM CDT | Tornado Watch | SPC | Gallatin, Hardin, Lawrence, Wabash | 8 hr |
| May 29, 8:45 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Carroll, Cass, Crawford and 15 more | 60 min |
| May 29, 9:21 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 13 more | 54 min |
| May 29, 9:35 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 26 more | 6 hr |
| May 29, 11:23 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Carroll, Cass, Crawford and 13 more | 67 min |
| May 30, 2:38 AM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Davis, Decatur, Jasper, Keokuk and 13 more | 97 min |
| May 30, 2:45 PM CDT | Mesoscale Discussion | SPC | Buffalo, Dunn, La Crosse, Pepin, Pierce, Saint Croix and 2 more | 2 hr |
Nearby
Tornado Watches in Iowa, 2004Tornado Watches in Illinois, 2004Tornado Watches in Wisconsin, 2004Every tornado watch in 2004
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.