Alert archive / Nebraska / Tornado Warnings in 1999
Tornado Warning 50, NWS North Platte, NE
NWS North Platte, NE issued this tornado warning at Jul 19, 1999, 4:13 PM MDT for Deuel County, Garden County, Nebraska. It was in force for 62 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 19, 1999, 4:13 PM MDT (22:13 UTC)
- Expired
- Jul 19, 1999, 5:15 PM MDT
- In force
- 62 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
Counties Deuel County, NE, Garden County, NE
The radar
The North Platte radar (KLNX), 160 km from the middle of the area, began a volume at 22:12 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 19, 4:27 PM MDT | Hail 1.75 | Oshkosh, NE | |
| Jul 19, 4:30 PM MDT | Tornado F0 | Oshkosh, NE | A brief tornado touchdown was reported by a spotter. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 19, 3:15 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.2 hours before the alert went out and 147 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
- 1159 J/kg
- Mixed-layer CIN
- -215 J/kg
- Mixed-layer LCL
- 1541 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 192214 RRA TORLBF NEC049-069-192315- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 513 PM CDT (413 PM MDT) MON JUL 19 1999 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * TORNADO WARNING FOR... DEUEL COUNTY IN THE NEBRASKA PANHANDLE SOUTHERN GARDEN COUNTY IN THE NEBRASKA PANHANDLE * UNTIL 515 PM MDT (615 PM CDT) * AT 412 PM MDT... NORTH PLATTE DOPPLER RADAR INDICATED A POSSIBLE TORNADO 32 MILES WEST OF OGALLALA OR 11 MILES NORTHEAST OF CHAPPELL...MOVING NORTH AT 10 MPH. THE TORNADO IS EXPECTED TO REMAIN IN RURAL AREAS ALONG HIGHWAY 27. IF YOU ARE IN A CAR...GO IN A NEARBY STURDY BUILDING! AS A LAST RESORT LIE FLAT IN A DITCH AND >COVER YOUR HEAD. DLS
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS North Platte, NE wrote its last area forecast discussion before this tornado warning went out at Jul 19, 1:54 PM MDT, 2 hours 19 minutes earlier.
Area forecast discussion, Jul 19, 1:54 PM MDT, 2 hours 19 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 254 PM CDT MON JUL 19 1999 ...FORECAST CHALLENGE IS THUNDERSTORM CHANCES AND HEAVY RAINFALL POTENTIAL TONIGHT... AT 19Z KLNX 88D SHOWED RAPIDLY DEVELOPING CONVECTION FILLING IN ALONG BOUNDARY THAT STRETCHED FROM NW OF SNY THROUGH MHN TO OFK. THIS APPEARS TO BE THE MAIN BOUNDARY THAT WAS PUSHED SOUTHWARD BY CONVECTION LAST NIGHT AND IS APPARENT ON VISIBLE SATELLITE IMAGERY. ANOTHER BOUNDARY...LIKELY CREATED BY OUTFLOW...EXTENDS FROM SURFACE LOW NEAR GLD EAST ALONG KS/NEB BORDER INTO SE NEB AT 18Z. INITIAL FOCUS WILL BE ON CONVECTION DEVELOPING ALONG THE FRONT IN NORTHERN HALF OF CWFA THIS AFTERNOON WHICH WILL PERSIST THIS EVENING. PLENTY OF MOISTURE TO FUEL STORMS WITH DEWPOINTS IN THE 60S TO AROUND 70 AND 850 MB DEWPOINTS IN THE 12 TO 14 DEG C RANGE. THINK INITIAL TSRA THIS EVENING WILL BE FOCUSED ON THE NORTHERN BOUNDARY WITH FURTHER DEVELOPMENT FROM NEAR SNY TO GLD AS SHORTWAVE MOVES OUT OF WY AND CO...WHERE 88D ALREADY SHOWING SOME DEVELOPMENT. THIS SHOULD ALSO TRIGGER TSRA ALONG CONVERGENCE BOUNDARY ALONG SOUTHERN BORDER. PREFER NGM HANDLING OF SHORTWAVE...AS ETA THIS RUN TOO FAST AND STRONG. NGM ALSO PERFORMED BETTER WITH SURFACE BOUNDARIES AND LOW POSITION FROM 12 TO 18Z AND THUS FAVORED. THE SURFACE LOW WILL MOVE INTO PANHANDLE OVERNIGHT WITH FRONT SHOWN TO LINGER FROM AXIS FROM NEAR SNY TO OFK. LOW LEVEL JET AND SURFACE UPSLOPE WINDS WILL AID IN SUSTAINING THUNDERSTORMS THROUGH THE NIGHT. WITH HIGHEST DEWPOINTS IN THE NORTHEAST...CONVERGENCE ALONG FRONT...HIGH PRECIPITABLE WATER VALUES...AND LOWEST FF GUIDANCE WILL ISSUE FLASH FLOOD WATCH FOR OVERNIGHT FOR KEYA PAHA...BOYD...ROCK...AND HOLT COUNTIES IN MY NORTHEAST ZONES PER COORD WITH FSD...RAP AND OAX. OVER REST OF CWFA WILL HAVE LIKELY POPS FOR TONIGHT WITH MENTION OF HEAVY RAINFALL FOR ALL BUT SW ZONES. FOR TUESDAY...SHOULD SEE SOME LINGERING CONVECTION NEAR BOUNDARY SIMILAR TO THIS MORNING IN THE EAST WITH WEAK SHORTWAVE AND OMEGA TO IMPACT NORTH CENTRAL THROUGH 18Z. WILL HAVE LOW SCATTERED POPS AND TEMPERATURES CLOSE TO GUIDANCE AND SLIGHTLY WARMER THAN TODAY AS WARM FRONT SHOULD BE NORTH OF AREA. WILL HAVE SOME ISOLATED LINGERING CONVECTION TUESDAY EVENING...BUT SHORTWAVE RIDGING SHOULD THEN KEEP DRY CONDITIONS FOR OVERNIGHT AND WEDNESDAY. GUIDANCE VALUES CLOSE TO PERSISTENCE AND LOOK REASONABLE. IN EXTENDED...WILL STICK WITH DRY FORECAST AS UPPER LEVEL RIDGE DOMINATES WITH HIGHS IN 90S AND LOWS IN 60S. .LBF...FLASH FLOOD WATCH TONIGHT NEZ006-007-009-010 SHEETS
In the hours before
Special weather statement, Jul 19, 10:35 AM MDT, 5 hours 38 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-192045- SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA NATIONAL WEATHER SERVICE NORTH PLATTE NE 1135 AM CDT MON JUL 19 1999 ...STORM SPOTTER ACTIVATION MAY BE NEEDED ACROS PARTS OF WESTERN AND NORTH CENTRAL NEBRASKA THIS AFTERNOON INTO TONIGHT... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MOST OF THE OUTLOOK AREA THIS AFTERNOON INTO TONIGHT...MAINLY EAST OF A LINE FROM MERRIMAN TO OSHKOSH. PLENTY OF LOW LOEVEL MOISTURE REMAINS ACROSS THE CENTRAL PLAINS AS IS EVIDENT BY THE HUMID CONDITIONS ACROSS THE OUTLOOK AREA. BY LATE AFTERNOON...A BOUNDARY NEAR THE SOUTHERN PORTION OF THE OUTLOOK AREA WILL SERVE AS A FOCUS FOR THIS LOW LEVEL MOISTURE TO BE LIFTED. WITH A VERY UNSTABLE AIRMASS IN PLACE...THE POSSIBILITY FOR THUNDERSTORMS TO DEVELOP WILL EXIST. THE MAIN THREAT WITH THESE THUNDERSTORMS WILL NOT ONLY BE LARGE HAIL AND GUSTY WINDS...BUT ALSO VERY HEAVY RAINFALL. MEANWHILE FURTHER WEST...AND UPPER LEVEL DISTURBANCE WILL MOVE INTO THE NORTHWEST PORTION OF THE OUTLOOK AREA BY LATE AFTERNOON. THIS...ALONG WITH INCREASING SUNSHINE THROUGH THE AFTERNOON...WILL SERVE TO DESTABILIZE THE AIRMASS AND PROVIDE THE POTENTIAL FOR THUNDERSTORMS TO DEVELOP. THESE STORMS WILL ALSO HAVE THE CAPABILITY TO PRODUCE LARGE HAIL AND DAMAGING WINDS. JWS
Special weather statement, Jul 19, 10:35 AM MDT, 5 hours 38 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-192045- SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA NATIONAL WEATHER SERVICE NORTH PLATTE NE 1135 AM CDT MON JUL 19 1999 ...STORM SPOTTER ACTIVATION MAY BE NEEDED ACROS PARTS OF WESTERN AND NORTH CENTRAL NEBRASKA THIS AFTERNOON INTO TONIGHT... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MOST OF THE OUTLOOK AREA THIS AFTERNOON INTO TONIGHT...MAINLY EAST OF A LINE FROM MERRIMAN TO OSHKOSH. PLENTY OF LOW LOEVEL MOISTURE REMAINS ACROSS THE CENTRAL PLAINS AS IS EVIDENT BY THE HUMID CONDITIONS ACROSS THE OUTLOOK AREA. BY LATE AFTERNOON...A BOUNDARY NEAR THE SOUTHERN PORTION OF THE OUTLOOK AREA WILL SERVE AS A FOCUS FOR THIS LOW LEVEL MOISTURE TO BE LIFTED. WITH A VERY UNSTABLE AIRMASS IN PLACE...THE POSSIBILITY FOR THUNDERSTORMS TO DEVELOP WILL EXIST. THE MAIN THREAT WITH THESE THUNDERSTORMS WILL NOT ONLY BE LARGE HAIL AND GUSTY WINDS...BUT ALSO VERY HEAVY RAINFALL. MEANWHILE FURTHER WEST...AND UPPER LEVEL DISTURBANCE WILL MOVE INTO THE NORTHWEST PORTION OF THE OUTLOOK AREA BY LATE AFTERNOON. THIS...ALONG WITH INCREASING SUNSHINE THROUGH THE AFTERNOON...WILL SERVE TO DESTABILIZE THE AIRMASS AND PROVIDE THE POTENTIAL FOR THUNDERSTORMS TO DEVELOP. THESE STORMS WILL ALSO HAVE THE CAPABILITY TO PRODUCE LARGE HAIL AND DAMAGING WINDS. JWS
Special weather statement, Jul 19, 1:53 PM MDT, 2 hours 20 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-192045- SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA NATIONAL WEATHER SERVICE NORTH PLATTE NE 253 PM CDT MON JUL 19 1999 ...STORM SPOTTER ACTIVATION MAY BE NEEDED ACROSS PARTS OF WESTERN INTO SOUTHWEST NEBRASKA LATER THIS AFTERNOON INTO TONIGHT... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MOST OF THE OUTLOOK AREA THIS AFTERNOON INTO TONIGHT...WITH THE GREATEST THREAT THIS AFTERNOON WEST OF A LINE FROM CURTIS TO LAKESIDE...AND ALSO EAST OF A LINE FROM AINSWORTH TO BROKEN BOW. ADDITIONAL SEVERE WEATHER MAY BE POSSIBLE THIS EVENING INTO TONIGHT ACROSS ALL OF THE OUTLOOK AREA. PLENTY OF LOW LEVEL MOISTURE REMAINS ACROSS THE CENTRAL PLAINS AS IS EVIDENT BY THE HUMID CONDITIONS ACROSS THE OUTLOOK AREA. SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP ALONG A STATIONARY FRONT THAT EXTENDS FROM SOUTHERN HOLT COUNTY WESTWARD INTO THE EASTERN PANHANDLE. ONE UPPER LEVEL DISTURBANCE IS EXPECTED TO EXIT THE EASTERN HALF OF THE OUTLOOK AREA BY THIS EVENING AND WILL CONTINUE TO DEVELOP THUNDERSTORMS ALONG THE BOUDARY THROUGH SUNSET. THE MAIN THREAT WITH THESE STORMS WILL BE VERY HEAVY RAINFALL...BUT DAMAGING WINDS AND SOME HAIL ARE POSSIBLE AS WELL. FURTHER WEST...A VERY UNSTABLE ATMOSPHERE WILL REMAIN IN PLACE ACROSS SOUTHWEST AND WESTERN NEBRASKA INTO THE EVENING HOURS. AS A SECOND UPPER LEVEL DISTURBANCE MOVES INTO THE EASTERN PANHANDLE THIS AFTERNOON...THUNDERSTORMS WILL CONTINUE TO DEVELOP IN THE EASTERN PANHANDLE...AND WILL HAVE THE CAPABILITY TO PRODUCE LARGE HAIL AND DAMAGING WINDS...ALONG WITH VERY HEAVY RAIN. ADDITIONAL THUNDERSTORM DEVELOPMENT WILL THEN BE POSSIBLE ALONG A WARM FRONT IN SOUTHWEST NEBRASKA LATE THIS AFTERNOON INTO THIS EVENING. AFTER SUNSET...THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL AND GUSTY WINDS. PERSONS PLANNING OUTDOOR ACTIVITIES THIS EVENING SHOULD MONITOR NOAA WEATHER RADIO FOR THE LATEST STATEMENTS AND POSSIBLE WARNINGS. JWS
Special weather statement, Jul 19, 1:53 PM MDT, 2 hours 20 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-192045- SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA NATIONAL WEATHER SERVICE NORTH PLATTE NE 253 PM CDT MON JUL 19 1999 ...STORM SPOTTER ACTIVATION MAY BE NEEDED ACROSS PARTS OF WESTERN INTO SOUTHWEST NEBRASKA LATER THIS AFTERNOON INTO TONIGHT... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MOST OF THE OUTLOOK AREA THIS AFTERNOON INTO TONIGHT...WITH THE GREATEST THREAT THIS AFTERNOON WEST OF A LINE FROM CURTIS TO LAKESIDE...AND ALSO EAST OF A LINE FROM AINSWORTH TO BROKEN BOW. ADDITIONAL SEVERE WEATHER MAY BE POSSIBLE THIS EVENING INTO TONIGHT ACROSS ALL OF THE OUTLOOK AREA. PLENTY OF LOW LEVEL MOISTURE REMAINS ACROSS THE CENTRAL PLAINS AS IS EVIDENT BY THE HUMID CONDITIONS ACROSS THE OUTLOOK AREA. SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP ALONG A STATIONARY FRONT THAT EXTENDS FROM SOUTHERN HOLT COUNTY WESTWARD INTO THE EASTERN PANHANDLE. ONE UPPER LEVEL DISTURBANCE IS EXPECTED TO EXIT THE EASTERN HALF OF THE OUTLOOK AREA BY THIS EVENING AND WILL CONTINUE TO DEVELOP THUNDERSTORMS ALONG THE BOUDARY THROUGH SUNSET. THE MAIN THREAT WITH THESE STORMS WILL BE VERY HEAVY RAINFALL...BUT DAMAGING WINDS AND SOME HAIL ARE POSSIBLE AS WELL. FURTHER WEST...A VERY UNSTABLE ATMOSPHERE WILL REMAIN IN PLACE ACROSS SOUTHWEST AND WESTERN NEBRASKA INTO THE EVENING HOURS. AS A SECOND UPPER LEVEL DISTURBANCE MOVES INTO THE EASTERN PANHANDLE THIS AFTERNOON...THUNDERSTORMS WILL CONTINUE TO DEVELOP IN THE EASTERN PANHANDLE...AND WILL HAVE THE CAPABILITY TO PRODUCE LARGE HAIL AND DAMAGING WINDS...ALONG WITH VERY HEAVY RAIN. ADDITIONAL THUNDERSTORM DEVELOPMENT WILL THEN BE POSSIBLE ALONG A WARM FRONT IN SOUTHWEST NEBRASKA LATE THIS AFTERNOON INTO THIS EVENING. AFTER SUNSET...THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL AND GUSTY WINDS. PERSONS PLANNING OUTDOOR ACTIVITIES THIS EVENING SHOULD MONITOR NOAA WEATHER RADIO FOR THE LATEST STATEMENTS AND POSSIBLE WARNINGS. JWS
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:20 PM MDT | Severe Thunderstorm Warning | LBF | McPherson | 35 min |
| Jul 19, 4:05 PM MDT | Severe Thunderstorm Warning | LBF | Deuel, Garden | 65 min |
| Jul 19, 5:05 PM MDT | Tornado Warning | LBF | Keith | 65 min |
| Jul 19, 5:22 PM MDT | Severe Thunderstorm Warning | LBF | Deuel, Garden | 33 min |
| Jul 19, 5:40 PM MDT | Severe Thunderstorm Warning | LBF | Perkins | 65 min |
Nearby
Tornado Warnings in Nebraska, 1999Every tornado warning in 1999Tornadoes in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.