Alert archive / Nebraska / Tornado Watches in 2003
Tornado Watch 513
The Storm Prediction Center issued this tornado watch at Jun 11, 2003, 1:40 PM MDT for 14 counties in Nebraska; 10 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2003, 1:40 PM MDT (19:40 UTC)
- Expired
- Jun 11, 2003, 8:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Arthur County, NE, Blaine County, NE, Brown County, NE, Cherry County, NE, Custer County, NE, Grant County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Thomas County, NE, Bennett County, SD, Haakon County, SD, Hughes County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Stanley County, SD, Todd County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 135 km from the middle of the area, began a volume at 19:40 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
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 3:37 PM MDT | Severe Thunderstorm Warning | LBF | Keith, Perkins | 38 min |
| Jun 11, 4:25 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 35 min |
| Jun 11, 4:49 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 56 min |
| Jun 11, 5:01 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 59 min |
| Jun 11, 5:09 PM MDT | Severe Thunderstorm Warning | ABR | Stanley | 36 min |
| Jun 11, 5:27 PM MDT | Severe Thunderstorm Warning | ABR | Lyman | 48 min |
| Jun 11, 6:01 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 44 min |
| Jun 11, 6:04 PM MDT | Tornado Warning | ABR | Hughes, Lyman | 41 min |
| Jun 11, 6:06 PM MDT | Tornado Warning | ABR | Hughes, Sully | 39 min |
| Jun 11, 6:15 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Brown | 45 min |
| Jun 11, 6:42 PM MDT | Tornado Warning | ABR | Hughes | 33 min |
| Jun 11, 6:42 PM MDT | Tornado Warning | ABR | Lyman | 48 min |
| Jun 11, 7:04 PM MDT | Tornado Warning | LBF | Blaine | 41 min |
| Jun 11, 7:07 PM MDT | Severe Thunderstorm Warning | LBF | Loup | 53 min |
| Jun 11, 7:11 PM MDT | Severe Thunderstorm Warning | LBF | Brown | 64 min |
| Jun 11, 7:18 PM MDT | Tornado Warning | ABR | Hughes | 27 min |
| Jun 11, 7:28 PM MDT | Tornado Warning | ABR | Lyman | 47 min |
| Jun 11, 7:46 PM MDT | Tornado Warning | LBF | Blaine | 44 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
Rapid City, SD (KUNR), launched 12:00Z, 7.7 hours before the alert went out and 204 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
- 14 J/kg
- Mixed-layer CIN
- -460 J/kg
- Mixed-layer LCL
- 1051 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 111942
SEL3
SPC WW 111940
NEZ000-SDZ000-120200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 513
NWS STORM PREDICTION CENTER NORMAN OK
240 PM CDT WED JUN 11 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL NEBRASKA
SOUTH CENTRAL SOUTH DAKOTA
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 240 PM UNTIL
900 PM CDT.
TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES NORTH NORTHEAST OF PHILIP SOUTH DAKOTA TO
15 MILES EAST SOUTHEAST OF NORTH PLATTE NEBRASKA.
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 509...WW 510...WW 511...WW
512...
DISCUSSION...AIR MASS IS DESTABILIZING AHEAD OF APPROACHING MID
LEVEL TROUGH AXIS AND SURFACE LOW NOW DEEPENING NEAR RAP. STRONG
CONVERGENCE NEAR THE LOW AND INVOF PRONOUNCED LEE TROUGH NOW MOVING
OUT OF THE NEB PANHANDLE SHOULD BREAK CAP AND ALLOW SEVERE
THUNDERSTORM DEVELOPMENT TO OCCUR IN THE NEXT HOUR OR SO. REGION
WILL REMAIN ON SRN FRINGE OF STRONGER WLY FLOW ASSOCIATED WITH NRN
STREAM TROUGH...AND BACKING LOW LEVELS WILL ENHANCE SHEAR AHEAD OF
THE SURFACE LOW/LEE TROUGH. THIS SUGGESTS ISOLATED TORNADOES MAY
ACCOMPANY STRONGER CELLS THIS EVENING...ALONG WITH A THREAT OF VERY
LARGE HAIL.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 25025.
...EVANS
443,0995 410,0991 410,1013 443,1023
WWUS20 KWNS 111942
SEL3
SPC WW 111940
NEZ000-SDZ000-120200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 513
NWS STORM PREDICTION CENTER NORMAN OK
240 PM CDT WED JUN 11 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL NEBRASKA
SOUTH CENTRAL SOUTH DAKOTA
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 240 PM UNTIL
900 PM CDT.
TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES NORTH NORTHEAST OF PHILIP SOUTH DAKOTA TO
15 MILES EAST SOUTHEAST OF NORTH PLATTE NEBRASKA.
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 509...WW 510...WW 511...WW
512...
DISCUSSION...AIR MASS IS DESTABILIZING AHEAD OF APPROACHING MID
LEVEL TROUGH AXIS AND SURFACE LOW NOW DEEPENING NEAR RAP. STRONG
CONVERGENCE NEAR THE LOW AND INVOF PRONOUNCED LEE TROUGH NOW MOVING
OUT OF THE NEB PANHANDLE SHOULD BREAK CAP AND ALLOW SEVERE
THUNDERSTORM DEVELOPMENT TO OCCUR IN THE NEXT HOUR OR SO. REGION
WILL REMAIN ON SRN FRINGE OF STRONGER WLY FLOW ASSOCIATED WITH NRN
STREAM TROUGH...AND BACKING LOW LEVELS WILL ENHANCE SHEAR AHEAD OF
THE SURFACE LOW/LEE TROUGH. THIS SUGGESTS ISOLATED TORNADOES MAY
ACCOMPANY STRONGER CELLS THIS EVENING...ALONG WITH A THREAT OF VERY
LARGE HAIL.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 25025.
...EVANS
443,0995 410,0991 410,1013 443,1023SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 1:06 PM MDT | Mesoscale Discussion | SPC | Arthur, Banner, Blaine, Box Butte, Chase, Cherry and 20 more | 114 min |
| Jun 11, 3:58 PM MDT | Mesoscale Discussion | SPC | Arthur, Blaine, Brown, Cherry, Custer, Grant and 7 more | 92 min |
| Jun 11, 4:33 PM MDT | Mesoscale Discussion | SPC | Chase, Dundy, Frontier, Furnas, Gosper, Hayes and 3 more | 87 min |
| Jun 11, 4:50 PM MDT | Severe Thunderstorm Watch | SPC | Chase, Dundy, Frontier, Furnas, Hayes, Hitchcock and 3 more | 5 hr |
| Jun 11, 5:04 PM MDT | Mesoscale Discussion | SPC | Antelope, Boone, Boyd, Garfield, Greeley, Holt and 12 more | 86 min |
| Jun 11, 5:45 PM MDT | Tornado Watch | SPC | Antelope, Boyd, Cedar, Garfield, Holt, Knox and 5 more | 4 hr |
Nearby
Tornado Watches in Nebraska, 2003Tornado Watches in South Dakota, 2003Every tornado 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.