Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 75, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jun 21, 1997, 10:45 PM MDT for Sheridan County, Nebraska. It was in force for 35 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
- Jun 21, 1997, 10:45 PM MDT (04:45 UTC)
- Expired
- Jun 21, 1997, 11:20 PM MDT
- In force
- 35 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Sheridan County, NE
The radar
The North Platte radar (KLNX), 163 km from the middle of the area, began a volume at 04:46 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 |
|---|---|---|---|
| Jun 21, 10:50 PM MDT | Hail 1 | Gordon, 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
Rapid City, SD (KUNR), launched 00:00Z, 4.8 hours before the alert went out and 178 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
- 951 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1507 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 220446 RRA SVRLBF NEC161-220520- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 1145 PM CDT (1045 PM MDT) SAT JUN 21 1997 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1120 PM MDT (1220 AM CDT) FOR PEOPLE IN THE FOLLOWING LOCATION... IN THE NEBRASKA PANHANDLE ...NORTHEASTERN SHERIDAN COUNTY AT 1044 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE DOPPLER RADAR 41 MILES EAST OF CHADRON OR IN THE VICINITY OF GORDON MOVING EAST AT 20 MPH. THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS EAST OF GORDON ALONG HIGHWAY 20. IF YOU ARE IN THE PATH OF THIS STORM YOU SHDOULD MOVE INTO A STRONG BUILDING. DO NOT STAND NEAR WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. DAUGHERTY
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 21, 9:04 PM MDT, 1 hour 41 minutes earlier.
Area forecast discussion, Jun 21, 9:04 PM MDT, 1 hour 41 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 1004 PM CDT (904 PM MDT) SAT JUN 21 1997 UPDATED SOUTHWEST NEBRASKA ZONES TO DELAY THE ONSET OF TSRA. STORMS THAT PREIOUSLY MOVED INTO PARTS OF NW AND NC NEBRASKA RAN INTO 3-4 DEGREE CAP AND FELL APART. WITH LOW LEVEL JET INCREASNIG ACROSS THE WRN HALF OF THE STATE AND CONVECTION IN NERN CO AND SHERIDAN COUNTY...AM NOT CONVINCED THAT POPS COULD BE REMOVED. TEMPS LOOK GOOD AS IS WITH DEW POINTS INCREASING ACROSS SW NEBR. STOPPKOTTE
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 9:57 PM MDT | Severe Thunderstorm Warning | LBF | Sheridan | 48 min |
| Jun 22, 4:46 AM MDT | Severe Thunderstorm Warning | LBF | Keya Paha | 59 min |
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.