Alert archive / South Dakota / Tornado Watches in 2000
Tornado Watch 718
The Storm Prediction Center issued this tornado watch at Aug 30, 2000, 5:30 PM CDT for 7 counties in North Dakota; 10 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2000, 5:30 PM CDT (22:30 UTC)
- Expired
- Aug 30, 2000, 10:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Cass County, ND, Dickey County, ND, LaMoure County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Brown County, SD, Campbell County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 61 km from the middle of the area, began a volume at 22:30 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
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 8:57 PM CDT | Severe Thunderstorm Warning | FGF | Ransom | 28 min |
| Aug 30, 9:51 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 29 min |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 10.5 hours before the alert went out and 122 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
- 1301 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 229 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
539 WWUS9 KMKC 302216 SEL8 SEL8 MKC WW 302210 NDZ000-SDZ000-310300- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 718 STORM PREDICTION CENTER NORMAN OK 510 PM CDT WED AUG 30 2000 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHEASTERN NORTH DAKOTA NORTHEASTERN SOUTH DAKOTA EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 530 PM UNTIL 1000 PM CDT. TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES WEST OF ABERDEEN SOUTH DAKOTA TO 40 MILES SOUTH SOUTHEAST OF FARGO NORTH DAKOTA. 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 717... DISCUSSION...STORMS ARE DEVELOPING NEAR SURFACE LOW AND WHERE AIR MASS IS POTENTIALLY UNSTABLE WITH A SBCAPE GRADIENT RANGING FROM 2000 TO 4500 J/KG RUNNING E-W ACROSS AREA. VAD WIND PROFILES SHOW FAVORABLE SHEAR PRESENT FOR ROTATING SUPERCELLS. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 25035. ...MCCARTHY 461,1000 471,0963 453,0963 443,1000
Nearby
Tornado Watches in South Dakota, 2000Tornado Watches in North Dakota, 2000Every tornado watch in 2000
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.