Alert archive / Iowa / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 710
The Storm Prediction Center issued this severe thunderstorm watch at Aug 9, 2005, 5:55 PM CDT for 28 counties in Iowa; Crawford County, Richland County, Vernon County, Wisconsin. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2005, 5:55 PM CDT (22:55 UTC)
- Expired
- Aug 9, 2005, 9:27 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 31 counties
Allamakee County, IA, Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Carroll County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Dallas County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Harrison County, IA, Howard County, IA, Marshall County, IA, Polk County, IA, Shelby County, IA, Story County, IA, Webster County, IA, Winneshiek County, IA, Wright County, IA, Crawford County, WI, Richland County, WI, Vernon County, WI
The radar
The Des Moines radar (KDMX), 141 km from the middle of the area, began a volume at 22:58 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
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 6:52 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 38 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.9 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
- 755 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1614 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 092252
SEL0
SPC WW 092252
IAZ000-WIZ000-100600-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 710
NWS STORM PREDICTION CENTER NORMAN OK
555 PM CDT TUE AUG 9 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL AND NORTHEAST IOWA
SOUTHWEST WISCONSIN
EFFECTIVE THIS TUESDAY AFTERNOON AND WEDNESDAY MORNING FROM 555 PM
UNTIL 100 AM CDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 105 MILES NORTHEAST OF
WATERLOO IOWA TO 65 MILES WEST OF DES MOINES IOWA. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU0).
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...CONTINUE...WW 707...WW 708...WW 709...
DISCUSSION...BAND OF THUNDERSTORMS ALONG A COLD FRONT WILL CONTINUE
TO MOVE SEWD THROUGH THE EARLY OVERNIGHT HOURS. STRONG INSTABILITY
IN ADVANCE OF THE ONGOING STORMS WILL SUPPORT A CONTINUED THREAT OF
DAMAGING WINDS WITH EMBEDDED BOWING SEGMENTS...AS WELL AS OCCASIONAL
LARGE HAIL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 32020.
...THOMPSON
433,0893 413,0934 413,0961 433,0921SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 11:25 AM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 9 more | 95 min |
| Aug 9, 2:20 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 20 more | 7 hr |
| Aug 9, 5:26 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo and 16 more | 94 min |
| Aug 9, 5:05 AM CDT | Mesoscale Discussion | SPC | Ashland, Bayfield, Burnett, Douglas, Iron, Oneida and 4 more | 115 min |
| Aug 9, 5:45 AM CDT | Severe Thunderstorm Watch | SPC | Ashland, Bayfield, Burnett, Douglas, Florence, Forest and 6 more | 5 hr |
| Aug 9, 11:51 AM CDT | Mesoscale Discussion | SPC | Barron, Burnett, Chippewa, Douglas, Dunn, Iron and 6 more | 84 min |
| Aug 9, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Buffalo, Calumet, Chippewa, Clark and 27 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 2005Severe Thunderstorm Watches in Wisconsin, 2005Every severe thunderstorm watch in 2005
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.