Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 207, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Aug 23, 1997, 6:33 PM MDT for Cherry County, Nebraska. It was in force for 62 min. 1 report 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
- Aug 23, 1997, 6:33 PM MDT (00:33 UTC)
- Expired
- Aug 23, 1997, 7:35 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 00:33 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 |
|---|---|---|---|
| Aug 23, 6:48 PM MDT | Hail 1 | Valentine, 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 nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.6 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
- 1146 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 2364 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 240032 RRA SVRLBF NEC031-240135- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 733 PM CDT (633 PM MDT) SAT AUG 23 1997 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 835 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL NEBRASKA ...NORTHEASTERN CHERRY COUNTY AT 731 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE DOPPLER RADAR 4 MILES NORTH OF VALENTINE MOVING SOUTH SOUTHEAST AT 10 MPH. DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... VALENTINE BY 745 PM CDT SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH... DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. RLB
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 Aug 23, 2:10 PM MDT, 4 hours 23 minutes earlier.
Area forecast discussion, Aug 23, 2:10 PM MDT, 4 hours 23 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 309 PM CDT SAT AUG 23 1997 FORECAST PROBLEM...CHANCES FOR THUNDERSTORMS AND TEMPERATURES 18Z SURFACE ANALYSIS SHOWING TROUGH FROM VTN TO OGA WITH 60 DEGREE DEWPOINTS ALONG AND AHEAD OF IT. VISIBLE SATELLITE INDICATES SOME CU DEVELOPING IN SHERIDAN AND WESTERN CHERRY COUNTY. WATER VAPOR IMAGERY INDICATING DRYING ADVECTING INTO THE AREA. UPPER AIR ANALYSIS FROM 12Z INDICATED WARM AIR ADVECTION AT 700MB AND A WEAK SHORTWAVE AT 500MB OVER WESTERN NEBRASKA. UPPER RIDGE REMAINS ANCHORED OVER THE ROCKIES AND SHIFTS SLIGHTLY INTO THE PLAINS AS IT FLATTENS SOME BY END OF THE PERIOD. SHORTWAVES MOVE THROUGH THE FLOW BUT MOISTURE IS LACKING. TONIGHT...WIDELY SCATTERED THUNDERSTORMS POSSIBLE NEAR THE TROUGH THIS EVENING. UPWARD VERTICAL VELOCITIES ARE INDICATED IN WESTERN NEBRASKA THIS EVENING FOR ISOLATED STORMS WEST OF THE TROUGH. AVERAGE RH IS 30 PERCENT SO BECOMING MOSTLY CLEAR BY MIDNIGHT. BOUNDARY LAYER WINDS LIGHT SOUTH. SUNDAY...AVERAGE RH 30 PERCENT SO MOSTLY SUNNY ENTIRE FA. BOUNDARY LAYER WINDS INDICATE SOUTHWEST 5-15. THIS SHOULD ALLOW GOOD WARMUP. DO NOT EXPECT MORNING CLOUDS OR FOG WITH DRYING MOVING INTO THE AREA. SUNDAY NIGHT...SOME PVA INDICATED OVER NORTH CENTRAL WITH SURFACE TROUGH IN PANHANDLE. MOISTURE IS LACKING SO WOULD LIMIT TO ISOLATED THUNDERSTORMS IN NORTHEAST PANHANDLE IN THE EVENING AND POSSIBLY MOVING INTO THE VTN AND LBF AREAS BY MIDNIGHT. SOUTH WINDS 5-15 AHEAD OF TROUGH. PARTLY CLOUDY PANHANDLE IN EVENING WITH MOSTLY CLEAR ELSWHERE. MONDAY...VORT LOBE CONTINUES ACROSS FA BUT BEST FORCING IS NORTH OF STATE. 50 PERCENT AVERAGE RH INDICATES PARTLY CLOUDY. WINDS SOUTHWEST 5 TO 15 NEAR. LBF UB 060/094 061/091 061 202 OGA UB 061/093 060/090 060 202 IML UB 062/094 060/091 061 20- VTN UB 061/099 065/092 062 202 ONL UB 061/097 066/092 061 202 FS
Nearby
Severe Thunderstorm Warnings in Nebraska, 1997Every severe thunderstorm warning in 1997
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.