Alert archive / Nebraska / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 821
The Storm Prediction Center issued this severe thunderstorm watch at Sep 14, 2004, 7:35 PM CDT for 7 counties in Kansas; 43 counties in Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 14, 2004, 7:35 PM CDT (00:35 UTC)
- Expired
- Sep 15, 2004, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 50 counties
Decatur County, KS, Jewell County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Republic County, KS, Smith County, KS, Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Red Willow County, NE, Sherman County, NE, Thayer County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, York County, NE
The radar
The North Platte radar (KLNX), 105 km from the middle of the area, began a volume at 00:37 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 |
|---|---|---|---|---|
| Sep 14, 8:12 PM CDT | Severe Thunderstorm Warning | GLD | Rawlins | 63 min |
| Sep 14, 8:15 PM CDT | Severe Thunderstorm Warning | LBF | McPherson | 45 min |
| Sep 14, 9:00 PM CDT | Severe Thunderstorm Warning | LBF | Thomas | 45 min |
| Sep 14, 9:15 PM CDT | Severe Thunderstorm Warning | GLD | Red Willow | 60 min |
| Sep 14, 9:36 PM CDT | Severe Thunderstorm Warning | LBF | Lincoln | 39 min |
| Sep 14, 9:41 PM CDT | Severe Thunderstorm Warning | GID | Furnas | 64 min |
| Sep 14, 10:48 PM CDT | Severe Thunderstorm Warning | GID | Harlan, Phelps | 27 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.6 hours before the alert went out and 70 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
- 784 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 796 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 259 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 150036
SEL1
SPC WW 150035
KSZ000-NEZ000-150700-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 821
NWS STORM PREDICTION CENTER NORMAN OK
735 PM CDT TUE SEP 14 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTH CENTRAL KANSAS
CENTRAL NEBRASKA
EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 735 PM
UNTIL 200 AM CDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 95 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 40 MILES WEST SOUTHWEST OF NORTH
PLATTE NEBRASKA TO 30 MILES SOUTH OF COLUMBUS NEBRASKA.
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 819...WW 820...
DISCUSSION...THUNDERSTORMS...INCLUDING POSSIBLE
SUPERCELLS...EXPECTED TO SPREAD INTO WRN PART OF WW IN THE NEXT 1-2
HRS AS ACTIVITY NOW IN NE CO/SW NEB CONTINUES E/ENE AHEAD OF STRONG
IMPULSE NOW IN CNTRL CO. OTHER STORMS MAY DEVELOP ALONG AND N OF
INTENSIFYING FRONTAL ZONE ORIENTED WSW/ENE ACROSS S CNTRL NEB AS
LLJ/MOISTURE INFLOW INCREASE LATER THIS EVENING. MAIN THREAT SHOULD
BE HAIL...WITH DAMAGING WIND MOST LIKELY IN SRN HALF OF WATCH.
AVIATION...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 25030.
...CORFIDI
421,1012 422,0971 393,0971 393,1012SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 8:56 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Rawlins, Sherman, Thomas, Wallace | 2 hr |
| Sep 14, 9:25 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more | 5 hr |
| Sep 15, 2:34 PM CDT | Mesoscale Discussion | SPC | Allen, Bourbon, Chautauqua, Cherokee, Crawford, Labette and 5 more | 86 min |
| Sep 14, 7:17 PM CDT | Mesoscale Discussion | SPC | Burt, Butler, Cass, Colfax, Cuming, Dakota and 13 more | 118 min |
| Sep 15, 4:00 AM CDT | Mesoscale Discussion | SPC | Cass, Johnson, Nemaha, Otoe | 3 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2004Severe Thunderstorm Watches in Kansas, 2004Every severe thunderstorm 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.