Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 152, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jul 2, 1999, 6:06 PM MDT for Chase County, Hayes County, Nebraska. It was in force for 64 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 2, 1999, 6:06 PM MDT (00:06 UTC)
- Expired
- Jul 2, 1999, 7:10 PM MDT
- In force
- 64 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
Counties Chase County, NE, Hayes County, NE
The radar
The Goodland radar (KGLD), 132 km from the middle of the area, began a volume at 00:09 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, 6:15 PM MDT | Hail 0.75 | Hamlet, NE | |
| Jul 2, 6:50 PM MDT | Thunderstorm Wind 60 | Champion, NE | Thunderstorm wind blew down several 12 inch diameter trees and several sheds. |
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, 3:00 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.1 hours before the alert went out and 94 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
As transmitted, in the capitals the NWS used until 2016.
403 WUUS1 KLBF 030006 RRA SVRLBF NEC029-085-030110- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 706 PM CDT (606 PM MDT) FRI JUL 2 1999 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME SOUTHEASTERN CHASE COUNTY IN SOUTHWESTERN NEBRASKA WESTERN HAYES COUNTY IN SOUTHWESTERN NEBRASKA * UNTIL 710 PM MDT (810 PM CDT) * AT 604 PM MDT (704 PM CDT)... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 18 MILES SOUTHEAST OF IMPERIAL OR 5 MILES WEST OF HAMLET... MOVING NORTHEAST AT 30 MPH. * DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... HAMLET BY 710 PM CDT HAYES CENTER BY 735 PM CDT WAUNETA BY 710 PM CDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS DLS
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, 4 hours 21 minutes earlier.
Area forecast discussion, Jul 2, 1:45 PM MDT, 4 hours 21 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
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 9:33 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 62 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.