Alert archive / Nebraska / Flash Flood Warnings in 1999
Flash Flood Warning 7, NWS North Platte, NE
NWS North Platte, NE issued this flash flood warning at Aug 17, 1999, 6:08 PM MDT for Chase County, Nebraska. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 17, 1999, 6:08 PM MDT (00:08 UTC)
- Expired
- Aug 17, 1999, 9:10 PM MDT
- In force
- 3 hr
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Chase County, NE
The radar
The Goodland radar (KGLD), 129 km from the middle of the area, began a volume at 00:12 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.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.1 hours before the alert went out and 114 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
- 2968 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1216 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 180010 FFWLBF NEC029-180310- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 708 PM CDT (608 PM MDT) TUE AUG 17 1999 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * FLASH FLOOD WARNING FOR... CHASE COUNTY IN SOUTHWESTERN NEBRASKA * UNTIL 910 PM MDT (1010 PM CDT) * AT 610 PM MDT... SPOTTERS AND LAW ENFORCEMENT REPORTED A THUNDERSTORM WITH VERY HEAVY RAIN ACROSS WESTERN AND CENTRAL CHASE COUNTY... MOVING MOVING SLOWLY EAST. * EXTREMELY HEAVY RAIN WAS FALLING ACROSS MUCH OF CENTRAL AND WESTERN CHASE COUNTY AND DOPPLER RADAR INDICATES RAINFALL IN IN EXCESS OF 4 INCHES. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! GEB
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Aug 17, 12:37 PM MDT, 5 hours 31 minutes earlier.
Area forecast discussion, Aug 17, 12:37 PM MDT, 5 hours 31 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 137 PM CDT TUE AUG 17 1999 ...FORECAST CHALLENGE WILL BE COVERAGE OF THUNDERSTORMS TONIGHT... ETA AND NGM CONTINUE TO AGREE ON VORT CHANNEL TOPPING THE RIDGE BY THIS EVENING AND MOVING ESE ACROSS SRN NE/NRN KS TONIGHT. OTHER FACTORS INCLUDE A SFC FRONT ACROSS NC KS PROGGED TO LIFT NORTHEAST INTO CENTRAL NEBRASKA THIS EVENING. DWPTS ABOVE 70 ALSO WILL POOL IN VCNTY OF THIS FRONT TONIGHT. PREFER ETA WITH MOVEMENT OF VORT CHANNEL AND ASSOC 700 UVV OVER NGM...ALTHOUGH GENERAL AGREEMENT BETWEEN THE TWO INCREASES CONFIDENCE OF AN MCS DEVELOPMENT TONIGHT. 250 MB DIV WILL SET UP NICELY FROM NW KS INTO EC NEBR BY 06Z WED...AS RR QUAD OF JET SUPPORTS THIS. 850 CONV ALSO WILL SET UP IN ERN CO BY 00Z TONIGHT AND SPREAD EASTWARD ACROSS NRN KS/SRN NE OVERNIGHT. A THETA E RIDGE DEVELOPS BY 00Z TONIGHT FROM WRN KS INTO WRN NE AND ORIENTS INTSELF EAST-WEST ALONG THE NE/KS BORDER OVERNIGHT. SOME HEAVY RAINFALL POSSIBLE AS PWS TO NEAR 1.5 INCHES SOUTH AND EAST OF LBF. ALSO EVENING WILL SUPPORT CHC OF SVR...MAINLY SOUTH OF I-80. RATHER QUICK MOVEMENT OF SYSTEM WILL LIMIT ANY SIGNIFICANT RAINFALL AMOUNTS HOWEVER. WILL INCLUDE LIKELY POPS ACROSS THE SRN HALF OF CWA TONIGHT...AND LOWER POPS TO THE NORTH. UPPER RIDGE WILL BUILD WESTWARD THROUGH 48HRS. ON WEDNESDAY GOOD SUBSIDENCE BEHIND SYSTEM. WINDS WILL ONCE AGAIN TURN TO THE NORTH AS SFC HIGH MOVES SOUTHEAST. APPROACH OF NRN STREAM SHORTWAVE WILL PRODUCE AS SFC TROUGH FROM MONTANA INTO ERN WY BY THU MORNING. DRY FCST WED AND THR. FAN AND FWC TEMPERATURE GUIDANCE CLOSE WITH LOWER AND MID 80S WED... WARMING SLIGHTLY INTO THE MID/UPPER 80S THR. IN THE EXTENDED...CHC OF THUNDERSTORMS FRI. DRY SAT AND SUN AS UPPER RIDGE KEEPS MOST OF ENERGY WELL TO THE NORTH OF CWA. HIGHS IN THE MID AND UPPER 80S IN NE COUNTIES WHILE AROUND 90 ELSEWHERE. LOWS AROUND 60. .LBF...NONE. ROBERG
In the hours before
Local storm report, Aug 17, 3:31 PM MDT, 2 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
431 PM CDT TUE AUG 17 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0350 PM 15 SSW OSHKOSH NE TORNADO
08/17/99 GARDEN 2 TORNADOES REPORTED BY
SPOTTERS
0355 PM 5 W LEWELLEN NE TORNADO
08/17/99 GARDEN 2 TORNADOES REPORTED BY
SPOTTERS
0402 PM 5 SE LEWELLEN NE TORNADO
08/17/99 GARDEN REPORTED BY SPOTTERS
0411 PM 3 N BIG SPRINGS NE TORNADO
08/17/99 DEUEL TORNADO REPORTED BY
SPOTTERS
FWMLocal storm report, Aug 17, 3:31 PM MDT, 2 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
431 PM CDT TUE AUG 17 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0350 PM 15 SSW OSHKOSH NE TORNADO
08/17/99 GARDEN 2 TORNADOES REPORTED BY
SPOTTERS
0355 PM 5 W LEWELLEN NE TORNADO
08/17/99 GARDEN 2 TORNADOES REPORTED BY
SPOTTERS
0402 PM 5 SE LEWELLEN NE TORNADO
08/17/99 GARDEN REPORTED BY SPOTTERS
0411 PM 3 N BIG SPRINGS NE TORNADO
08/17/99 DEUEL TORNADO REPORTED BY
SPOTTERS
FWMLocal storm report, Aug 17, 5:34 PM MDT, 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
634 PM CDT TUE AUG 17 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0625 PM 10 SSW MADRID NE 1.00 INCH HAIL
08/17/99 PERKINS
0541 PM BRANDON NE 1.00 INCH HAIL
08/17/99 PERKINS
0538 PM BRANDON NE 1.75 INCH HAIL
08/17/99 PERKINS
1710 PM 4 SE MULLEN NE 0.75 INCH HAIL
08/17/99 HOOKER
0520 PM 15 NW OGALLALA NE 0.75 INCH HAIL
08/17/99 KEITH
0502 PM 1 S LEWELLEN NE 1.75 INCH HAIL
08/17/99 GARDEN
GEBLocal storm report, Aug 17, 5:34 PM MDT, 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
634 PM CDT TUE AUG 17 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0625 PM 10 SSW MADRID NE 1.00 INCH HAIL
08/17/99 PERKINS
0541 PM BRANDON NE 1.00 INCH HAIL
08/17/99 PERKINS
0538 PM BRANDON NE 1.75 INCH HAIL
08/17/99 PERKINS
1710 PM 4 SE MULLEN NE 0.75 INCH HAIL
08/17/99 HOOKER
0520 PM 15 NW OGALLALA NE 0.75 INCH HAIL
08/17/99 KEITH
0502 PM 1 S LEWELLEN NE 1.75 INCH HAIL
08/17/99 GARDEN
GEBThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 6:13 PM MDT | Severe Thunderstorm Warning | LBF | Chase | 62 min |
| Aug 17, 6:22 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 63 min |
| Aug 17, 6:26 PM MDT | Severe Thunderstorm Warning | LBF | Hayes | 64 min |
| Aug 17, 6:31 PM MDT | Tornado Warning | LBF | Lincoln | 64 min |
| Aug 17, 7:03 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 62 min |
| Aug 17, 7:10 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 65 min |
| Aug 17, 8:12 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 48 min |
Nearby
Flash Flood Warnings in Nebraska, 1999Every flash flood warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.