Alert archive / Iowa / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 577
The Storm Prediction Center issued this severe thunderstorm watch at Jun 24, 2003, 12:35 AM CDT for 30 counties in Iowa; 27 counties in Minnesota; 6 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 2003, 12:35 AM CDT (05:35 UTC)
- Expired
- Jun 24, 2003, 6:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 63 counties
Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Mitchell County, IA, Monona County, IA, O'Brien County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA, Winnebago County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Anoka County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Buffalo County, WI, Chippewa County, WI, Dunn County, WI, Pepin County, WI, Pierce County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 180 km from the middle of the area, began a volume at 05:35 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
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 12:52 AM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 38 min |
| Jun 24, 1:14 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 46 min |
| Jun 24, 1:22 AM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Webster | 53 min |
| Jun 24, 1:38 AM CDT | Severe Thunderstorm Warning | DMX | Greene, Webster | 37 min |
| Jun 24, 2:07 AM CDT | Severe Thunderstorm Warning | MPX | Carver, Scott | 38 min |
| Jun 24, 2:22 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Ramsey, Washington | 53 min |
| Jun 24, 2:25 AM CDT | Flash Flood Warning | FSD | Cherokee, Ida, Woodbury | 4 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
Minneapolis, MN (KMPX), launched 00:00Z, 5.6 hours before the alert went out and 179 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
- 1955 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1314 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 240533
SEL7
SPC WW 240535
IAZ000-MNZ000-WIZ000-241100-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 577
NWS STORM PREDICTION CENTER NORMAN OK
1235 AM CDT TUE JUN 24 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN AND WESTERN IOWA
SOUTHERN MINNESOTA
WESTERN WISCONSIN
EFFECTIVE THIS TUESDAY MORNING FROM 1235 AM UNTIL 600 AM CDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 75 STATUTE MILES
EAST AND WEST OF A LINE FROM 50 MILES NORTHEAST OF MINNEAPOLIS
MINNESOTA TO 60 MILES SOUTHWEST OF FORT DODGE IOWA.
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 572. WATCH NUMBER 572 WILL NOT BE IN EFFECT
AFTER 1235 AM CDT. CONTINUE...WW 573...WW 574...WW 575...WW 576...
DISCUSSION...SEVERE THUNDERSTORMS OVER NWRN IA WILL CONTINUE TO
DEVELOP NEWD INTO A VERY UNSTABLE AIRMASS ACROSS SRN MN AND NRN IA.
SHEAR PROFILES ARE FAVORABLE FOR STORMS DEVELOPING BOWS AND SHORT
LINE SEGMENTS WHICH WILL ENHANCE WIND DAMAGE POTENTIAL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
MOTION VECTOR 25035.
...HALES
452,0905 415,0933 415,0962 452,0940SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 8:08 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Calhoun, Carroll and 28 more | 67 min |
| Jun 23, 8:55 PM CDT | Tornado Watch | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cass, Cerro Gordo and 24 more | 4 hr |
| Jun 23, 9:10 PM CDT | Mesoscale Discussion | SPC | Cherokee, Dickinson, Lyon, O'Brien, Osceola, Sioux | 65 min |
| Jun 23, 10:38 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cherokee, Clay, Humboldt, Ida and 9 more | 67 min |
| Jun 23, 10:50 PM CDT | Tornado Watch | SPC | Plymouth | 5 hr |
| Jun 23, 11:45 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, O'Brien, Osceola, Sioux | 6 hr |
| Jun 24, 1:52 AM CDT | Mesoscale Discussion | SPC | Plymouth | 53 min |
| Jun 24, 2:05 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Allamakee, Benton, Black Hawk, Boone and 39 more | 5 hr |
| Jun 24, 2:44 AM CDT | Mesoscale Discussion | SPC | Lyon, Osceola, Sioux | 2 hr |
| Jun 24, 3:09 AM CDT | Mesoscale Discussion | SPC | Boone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 12 more | 96 min |
| Jun 24, 11:43 AM CDT | Mesoscale Discussion | SPC | Adams, Cass, Fremont, Harrison, Mills, Montgomery and 3 more | 2 hr |
| Jun 24, 2:15 PM CDT | Tornado Watch | SPC | Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux | 8 hr |
| Jun 24, 3:56 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Fremont, Guthrie and 6 more | 64 min |
| Jun 24, 5:25 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Boone, Buena Vista, Butler, Calhoun and 30 more | 5 hr |
| Jun 24, 5:59 PM CDT | Mesoscale Discussion | SPC | Lyon, O'Brien, Osceola, Plymouth, Sioux | 61 min |
| Jun 24, 1:21 AM CDT | Mesoscale Discussion | SPC | Big Stone, Lac qui Parle, Stevens, Yellow Medicine | 114 min |
| Jun 24, 4:20 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Anoka, Benton, Big Stone, Carlton, Chippewa and 21 more | 6 hr |
| Jun 24, 5:00 PM CDT | Severe Thunderstorm Watch | SPC | Blue Earth, Brown, Carver, Dakota, Dodge, Faribault and 18 more | 5 hr |
| Jun 24, 9:32 AM CDT | Mesoscale Discussion | SPC | Ashland, Iron | 2 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 2003Severe Thunderstorm Watches in Minnesota, 2003Severe Thunderstorm Watches in Wisconsin, 2003Every severe thunderstorm watch in 2003
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.