Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 192, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Aug 21, 1997, 6:17 AM MDT for Cherry County, Nebraska. It was in force for 48 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 21, 1997, 6:17 AM MDT (12:17 UTC)
- Expired
- Aug 21, 1997, 7:05 AM MDT
- In force
- 48 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 12:08 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 21, 6:30 AM MDT | Hail 1.25 | Wood Lake, 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 12:00Z, 0.3 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
- 969 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 1037 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 251 m²/s²
- 0-3 km storm-relative helicity
- 348 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 211218 RRA SVRLBF NEC031-211305- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 717 AM CDT (617 AM MDT) THU AUG 21 1997 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 805 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL NEBRASKA ...EXTREME NORTHEASTERN CHERRY COUNTY AT 715 AM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE DOPPLER RADAR 12 MILES EAST SOUTHEAST OF VALENTINE OR 5 MILES NORTH NORTHEAST OF ARABIA MOVING SOUTH SOUTHEAST AT 35 MPH. DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... WOOD LAKE BY 735 AM CDT IF YOU ARE IN THE PATH OF THIS STORM YOU SHOULD 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 C(ROSSINGS. ROBERG
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 21, 2:57 AM MDT, 3 hours 20 minutes earlier.
Area forecast discussion, Aug 21, 2:57 AM MDT, 3 hours 20 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 356 AM CDT (256 AM MDT) THU AUG 21 1997 UPDATED... TSRA DVLPG QUICKLY IN AREA OF STRONG ISENTROPIC LIFT AS SEEN ON 3Z RUC. THIS IN 309-312K LAYER. 700-500 THTA-E ANLYSIS ALSO SHOWS THE POTENTIAL INSTABILITY WITH ELEVATED CONVECTION. WITH ISENTROPIC CONTINUING INTO THE MORNING...SCT TSRA NEEDED IN UPCOMING ZONES... THIS SITUATION MAY BE SIMILAR TO SPC DISC FOR SC KS...AND WILL HAVE TO WATCH FOR TRAINING.... STOPPKOTTE
In the hours before
Special weather statement, Aug 21, 6:00 AM MDT, 17 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-221200- SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA NATIONAL WEATHER SERVICE NORTH PLATTE NE 700 AM CDT (600 AM MDT) TUE AUG 19 1997 THIS OUTLOOK PERTAINS TO THE FOLLOWING NEBRASKA COUNTIES... ARTHUR BLAINE BOYD BROWN CHASE CHERRY CUSTER DEUEL FRONTIER GARDEN GARFIELD GRANT HAYES HOLT HOOKER KEITH KEYA PAHA LINCOLN LOGAN LOUP MCPHERSON PERKINS ROCK SHERIDAN THOMAS WHEELER ...STORM SPOTTER ACTIVATION MAY BE NEEDED IN PARTS OF NORTHERN AND WESTERN NEBRASKA BY LATE AFTERNOON INTO TONIGHT... THERE IS A SLIGHT CHANCE FOR SEVERE THUNDERSTORMS LATE THIS AFTERNOON INTO TONIGHT...WEST OF A LINE FROM VALENTINE TO BROKEN BOW. WIDELY SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS THE REMAINDER OF THE AREA BY THIS EVENING AS WELL...BUT ARE NOT EXPECTED TO REACH SEVERE LIMITS. SCATTERED THUNDERSTORMS WILL CONTINUE ACROSS PORTIONS OF NORTH CENTRAL NEBRASKA...MAINLY EAST OF A LINE FROM VALENTINE TO BROKEN BOW...THIS MORNING WITH ISOLATED STORMS HAVING THE POTENTIAL TO PRODUCE LARGE HAIL. WITH STABLE AIR NEAR THE SURFACE...WIDESPREAD DAMAGING WINDS ARE NOT EXPECTED. BY AFTERNOON...AN UPPER LEVEL DISTURBANCE WILL ENTER THE NORTHWESTERN PORTION OF THE OUTLOOK AREA. IN THE MEANTIME...AN INCREASE IN LOW LEVEL MOISTURE WILL CONTINUE INTO THE WESTERN HIGH PLAINS. WITH SUFFICIENT AFTERNOON HEATING...THE ATMOSPHERE WEST OF A LINE FROM VALENTINE TO NORTH PLATTE WILL BECOME QUITE UNSTABLE. AS THE UPPER LEVEL DISTURBANCE ENHANCES AN AREA OF LOW PRESSURE EXPECTED TO DEVELOP BY LATE AFTERNOON IN THE NORTHWESTERN PART OF THE AREA...SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP...MAINLY AFTER 200 PM MDT. AFTER INITIATION...THE THUNDERSTORMS ARE EXPECTED TO MOVE SOUTHEAST ACROSS THE AREA WEST OF A LINE FROM VALENTINE TO BROKEN BOW. WIND PROFILES THROUGH THE ATMOSPHERE WILL BE CONDUCIVE FOR PRODUCTION OF SEVERE THUNDERSTORMS...WITH THE MAIN THREAT OF SEVERE WEATHER COMING FROM LARGE HAIL AND DAMAGING WINDS...ALTHOUGH ISOLATED TORNADOES MAY BE POSSIBLE AS WELL. WIDELY SCATTERED THUNDERSTORMS WILL BE POSSIBLE BY FRIDAY AFTERNOON ACROSS THE OUTLOOK AREA ALSO...A FEW OF WHICH WILL AGAIN HAVE TO THE POTENTIAL TO BECOME SEVERE. STOPPKOTTE
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 6:37 PM MDT | Severe Thunderstorm Warning | LBF | Chase | 63 min |
| Aug 21, 4:24 AM MDT | Severe Thunderstorm Warning | LBF | Brown | 46 min |
| Aug 21, 5:24 AM MDT | Severe Thunderstorm Warning | LBF | Blaine | 46 min |
| Aug 21, 6:00 AM MDT | Severe Thunderstorm Warning | LBF | Custer | 65 min |
| Aug 21, 1:19 PM MDT | Severe Thunderstorm Warning | LBF | Garfield | 31 min |
| Aug 21, 5:16 PM MDT | Severe Thunderstorm Warning | LBF | Deuel, Keith | 49 min |
| Aug 21, 5:30 PM MDT | Severe Thunderstorm Warning | LBF | Keith | 50 min |
| Aug 21, 5:56 PM MDT | Severe Thunderstorm Warning | LBF | Perkins | 49 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.