Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 98, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jun 7, 1998, 6:20 PM MDT for Chase County, Nebraska. It was in force for 60 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
- Jun 7, 1998, 6:20 PM MDT (00:20 UTC)
- Expired
- Jun 7, 1998, 7:20 PM MDT
- In force
- 60 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Chase County, NE
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 7, 6:51 PM MDT | Hail 1 | Lamar, NE | |
| Jun 7, 7:10 PM MDT | Hail 1.75 | Champion, 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 |
|---|---|---|---|
| Jun 7, 6:00 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.3 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
- 68 J/kg
- Mixed-layer CIN
- -234 J/kg
- Mixed-layer LCL
- 1442 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 080019 RRA SVRLBF NEC029-080120- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 720 PM CDT (620 PM MDT) SUN JUN 7 1998 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN CHASE COUNTY IN SOUTHWESTERN NEBRASKA * UNTIL 720 PM MDT (820 PM CDT) * AT 617 PM MDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 27 MILES WEST OF IMPERIAL OR 11 MILES SOUTHWEST OF LAMAR MOVING EAST AT 25 MPH. * DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... LAMAR BY 640 PM MDT A TORNADO WATCH IS IN EFFFECT! GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WI|NDOWS! SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. SP
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 Jun 7, 1:53 PM MDT, 4 hours 27 minutes earlier.
Area forecast discussion, Jun 7, 1:53 PM MDT, 4 hours 27 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 253 PM CDT SUN JUN 7 1998 ...FORECAST PROBLEM WILL BE POPS... MODELS SIMILAR COMBINING SPLIT FLOW IN 500 TROUGH OVER WESTERN U.S. INTO ONE BROAD 500 TROUGH WITH WEAK SHORTWAVE INTO NORTHERN KS AND SOUTHERN NEB BY 00Z TONIGHT WITH STRONGER SHORTWAVE EJECTING OUT OF TROUGH INTO WESTERN NEBRASKA BY 12Z MON. STRONG NVA BEHIND SYSTEM IN CWA BY 00Z TUE WITH 500 TROUGH REMAINING IN PLACE OVER WESTERN U.S. THROUGH FORECAST PERIOD. THESE WAVES WILL ENCOUNTER INCREASING MOISTURE WITH TIME AS LLJ REMAINS ACROSS CWA TONIGHT. UPSLOPE FLOW AND DECENT ISENTROPIC LIFT ON THE I290...I295...I300 AND I305 SURFACES WILL ALSO AID IN PRECIP. 850 DEW POINTS INCREASE TONIGHT WITH LLJ WITH 6-8 DEW POINTS AT 00Z AND 8-12 BY 12Z. NGM DRIES OUT 850 TOO FAST AND LIKE ETA WITH SLOWER PROGRESSION OF DRY AIR INTO CWA ON MONDAY. AIRMASS IS PRETTY UNSTABLE WITH LIFTED INDEXES PROGGED IN 0 TO -4 RANGE TONIGHT AND TOMORROW NIGHT AND 700-500 DELTA T GREATER THAN 19 OVER SOUTHERN CWA TONIGHT. 850 AND 700 THTE RIDGES ALSO MOVE ACROSS CWA TONIGHT...SO WITH ABOVE FACTORS PLUS STATIONARY FRONT THAT AT 18Z WAS NEAR SNY TO SOUTH OF LBF TO STJ MEANS HIGH POPS ESPECIALLY ACROSS THE SOUTHERN CWA. FOR MONDAY...WITH NVA ENTERING INTO PICTURE PLUS ISENTROPIC DOWNGLIDE ON ALL FOUR SURFACES FROM I290 TO I305 MOVING ACROSS CWA DURING DAY AND DRY SLOT WHICH CLIPS SOUTHERN HALF OF CWA...PRECIP SHOULD END IN SOUTHERN NEBRASKA BEFORE NOON AND HANG ON ACROSS REST OF CWA. THIS DRY SLOT WILL AFFECT TEMPS AND POPS WITH LOWEST TEMPS AND HIGHEST POPS IN NORTH FOR MONDAY AND VICE VERSA FOR SOUTHERN CWA. WILL REMAIN WINDY ACROSS CWA THROUGH MONDAY AS 850 GRADIENT TIGHTENS. FOR MONDAY NIGHT...NORTH CENTRAL STILL REMAINS IN WRAPAROUND MOISTURE AND WILL KEEP HIGHEST POPS THERE. GOING FORECAST TONIGHT LOOKS GOOD...BUT RECOMMEND 50 TO 55 FOR ALL ZONES. PRELIMINARY GUIDANCE FOR COORDINATION ONLY. OFFICIAL FORECASTS ARE CONTAINED WITHIN PRODUCT OMAZFPNE. CCF LBF BB 052/076 049/076 052 707110 ANW TB 052/062 050/072 052 707532 OGA BB 053/076 050/076 053 707110 ONL TB 053/064 052/072 054 707533 IML BB 053/077 050/077 053 707110 BBW EB 052/071 050/074 053 707311 VTN TB 052/060 047/072 051 707531 MICHELS
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 7:03 PM MDT | Severe Thunderstorm Warning | LBF | Perkins | 62 min |
| Jun 7, 7:05 PM MDT | Tornado Warning | LBF | Chase | 35 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1998Every severe thunderstorm warning in 1998
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.