Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 161, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jul 2, 1999, 9:33 PM MDT for Cherry County, Nebraska. It was in force for 62 min. 3 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 2, 1999, 9:33 PM MDT (03:33 UTC)
- Expired
- Jul 2, 1999, 10:35 PM MDT
- In force
- 62 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Cherry County, NE
The radar
The North Platte radar (KLNX), 79 km from the middle of the area, began a volume at 03:35 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 2, 9:45 PM MDT | Thunderstorm Wind 60 | Merriman, NE | |
| Jul 2, 10:00 PM MDT | Hail 0.75 | Valentine, NE | |
| Jul 2, 10:00 PM MDT | Thunderstorm Wind 60 | Merriman, NE |
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 2, 7:30 PM MDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.6 hours before the alert went out and 163 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
- 5849 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 3.4
- Supercell composite
- 25.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 2, 1:45 PM MDT, 7 hours 48 minutes earlier.
Area forecast discussion, Jul 2, 1:45 PM MDT, 7 hours 48 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 245 PM CDT FRI JUL 2 1999 ...FORECAST CHALLENGES ARE THUNDERSTORM CHANCES TONIGHT THEN TEMPERATURES... SURFACE WARM FRONT HAS LIFTED NORTH THROUGH MOST OF CWFA PUSHING DEWPOINTS INTO LOWER TO MID 70S SE OF AXIS FROM VTN TO IML. WARM FRONT EXTENDED SW TO LOW IN FAR SE WY. CI FROM CONVECTION OVER MTNS HAS KEPT TEMPERATURES A BIT COOLER THAN EXPECTED SO FAR. VERY UNSTABLE BUT CAPPED ATMOSPHERE IS OVER AREA FROM MCK TO VTN. FORECAST PROBLEM IS WHERE CONVECTION WILL DEVELOP TONIGHT. NEAREST UPSTREAM TSRA ACTIVITY AT 19Z WAS FROM CENTRAL CO TO SW KS ASSOCIATED WITH WEAK SHORTWAVE MOVING OUT OF NEW MEXICO. WITHOUT STRONG DYNAMICS...WILL LEAVE IN 20 PERCENT POPS FOR OVERNIGHT THUNDERSTORMS ACROSS FORECAST AREA...EXCEPT IN THE NE. IN ONL TO ANW GROUP THE PROXIMITY TO THE WARM FRONT AND UPSTREAM SURFACE DEWPOINTS IN MID 70S WILL WARRANT KEEPING POPS A BIT HIGHER AT 30 PERCENT. THIS AREA WILL ALSO NEED TO BE WATCHED FOR POTENTIAL HEAVY RAINFALL AS FLASH FLOOD GUIDANCE VALUES THERE ARE LOW DUE TO RECENT RAINFALL. ETA HAD BEST RUN TO RUN MODEL CONSISTENCY AND WAS BETTER THAN NGM WITH SURFACE DEWPOINTS. IT ALSO HAD GOOD HANDLE ON VORT MAX AT 18Z MOVING OUT OF SW AND THUS MODEL OF CHOICE. NOT A LOT OF DIFFERENCE BETWEEN MODELS IN HANDLING OF MAJOR FEATURES. WENT CLOSER TO WARMER FAN TEMPERATURES FOR HIGHS SAT AND SUNDAY WITH OVERNIGHT LOWS CLOSE TO GUIDANCE. EXPECT CAP TO REMAIN STRONG ENOUGH TO LEAVE OUT MENTION OF TSRA SATURDAY AND WILL KEEP FORECAST DRY AND HOT WITH BREEZY CONDITIONS MENTIONED IN MOST ZONES. HOT AND DRY TREND WILL PERSIST SUNDAY WITH SURFACE TROUGH HANGING TOUGH OVER WESTERN NE. IN EXTENDED...93P GUIDANCE NOW HAS HIGHS ONLY IN LOWER 80S FOR MONDAY WITH MRF SHOWING DRY COLD FRONT TO PUSH INTO FORECAST AREA AND WILL CUT HIGHS BACK SOME FOR MONDAY AND ADD CHANCE OF THUNDERSTORMS FOR WEDNESDAY WITH SHORTWAVE MOVING OVER RIDGE THROUGH AREA. .LBF...NONE. SHEETS
In the hours before
Special weather statement, Jul 2, 7:59 PM MDT, 1 hour 34 minutes before
NEZ005>010-022-024>029-035>038-056>059-069>071-030645- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 858 PM CDT (758 PM MDT) FRI JUL 2 1999 ...TORNADO WATCH IN EFFECT UNTIL 130 AM CDT (1230 PM MDT) FOR PORTIONS OF WESTERN AND NORTH CENTRAL NEBRASKA... A TORNADO WATCH IS IN EFFECT FOR PARTS OF WESTERN AND NORTH CENTRAL NEBRASKA UNTIL 130 AM CDT (1230 PM MDT). COUNTIES INCLUDED IN THE WATCH INCLUDE BLAINE...BOYD...BROWN...GARFIELD...HOLT...KEYA PAHA...LOUP...ROCK...WHEELER...CUSTER...FRONTIER...HAYES... LINCOLN...LOGAN...MCPHERSON...CHERRY...HOOKER AND THOMAS COUNTIES. THIS INCLUDES THE CITIES OF OGALLALA...IMPERIAL...NORTH PLATTE... VALENTINE...BROKEN BOW...AINSWORTH AND O NEILL. VERY UNSTABLE CONDITIONS EXIST ACROSS WESTERN AND NORTH CENTRAL NEBRASKA WITH THE THREAT FOR A FEW TORNADOES. STORMS WILL CONTINUE TO DEVELOP WITH THE POTENTIAL FOR LARGE HAIL AND WIND GUSTS IN EXCESS OF 80 MPH IN THE VICINITY OF SOME STORMS. THE SEVERE THUNDERSTORM WATCH WHICH WAS IN EFFECT FOR PART OF WESTERN NEBRASKA HAS BEEN UPGRADED TO THE TORNADO WATCH. COUNTIES WHICH ARE NO LONGER INCLUDED IN THE WATCH ARE DEUEL...ARTHUR AND GRANT COUNTIES. TLK
Local storm report, Jul 2, 8:04 PM MDT, 1 hour 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
904 PM CDT FRI JUL 2 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0850 PM NORTH PLATTE NE 60 MPH WIND GUST
07/02/99 LINCOLN 14-16 INCH DIAMETER TREE
DOWN
0850 PM 2 E NORTH PLATTE NE 0.75 INCH HAIL
07/02/99 LINCOLN
0853 PM 2 E NORTH PLATTE NE 70 MPH WIND GUST
07/02/99 LINCOLN 70 MPH WIND GUST AT
AIRPORT
DPLocal storm report, Jul 2, 8:04 PM MDT, 1 hour 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
904 PM CDT FRI JUL 2 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0850 PM NORTH PLATTE NE 60 MPH WIND GUST
07/02/99 LINCOLN 14-16 INCH DIAMETER TREE
DOWN
0850 PM 2 E NORTH PLATTE NE 0.75 INCH HAIL
07/02/99 LINCOLN
0853 PM 2 E NORTH PLATTE NE 70 MPH WIND GUST
07/02/99 LINCOLN 70 MPH WIND GUST AT
AIRPORT
DPLocal storm report, Jul 2, 8:47 PM MDT, 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
947 PM CDT FRI JUL 2 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0850J PM 4 NE PAXTON NE 60 MPH WIND GUST
07/02/99 KEITH 60 MPH WIND GUST WITH
TREE LIMBS DOWN
DPLocal storm report, Jul 2, 8:47 PM MDT, 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
947 PM CDT FRI JUL 2 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0850J PM 4 NE PAXTON NE 60 MPH WIND GUST
07/02/99 KEITH 60 MPH WIND GUST WITH
TREE LIMBS DOWN
DPLocal storm report, Jul 2, 9:06 PM MDT, 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1006 PM CDT FRI JUL 2 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0950 PM 5 SW HAY SPRINGS NE 1.00 INCH HAIL
07/02/99 SHERIDAN
DPThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 6:06 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Hayes | 64 min |
| Jul 2, 6:28 PM MDT | Severe Thunderstorm Warning | LBF | Chase | 62 min |
| Jul 2, 6:46 PM MDT | Severe Thunderstorm Warning | LBF | Perkins | 59 min |
| Jul 2, 7:00 PM MDT | Tornado Warning | LBF | Perkins | 50 min |
| Jul 2, 7:09 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 61 min |
| Jul 2, 7:43 PM MDT | Tornado Warning | LBF | Keith, Lincoln, McPherson | 47 min |
| Jul 2, 8:15 PM MDT | Severe Thunderstorm Warning | LBF | Custer, Lincoln, Logan | 60 min |
| Jul 2, 8:15 PM MDT | Severe Thunderstorm Warning | LBF | Thomas | 60 min |
| Jul 2, 8:29 PM MDT | Severe Thunderstorm Warning | LBF | Hooker, McPherson | 61 min |
| Jul 2, 8:43 PM MDT | Severe Thunderstorm Warning | LBF | Sheridan | 62 min |
| Jul 2, 9:10 PM MDT | Tornado Warning | LBF | Sheridan | 45 min |
| Jul 2, 9:20 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 60 min |
| Jul 2, 9:56 PM MDT | Tornado Warning | LBF | Cherry | 64 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1999Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.