Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 190, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Aug 21, 1997, 6:24 AM CDT for Blaine County, Nebraska. It was in force for 46 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, 6:24 AM CDT (11:24 UTC)
- Expired
- Aug 21, 1997, 7:10 AM CDT
- In force
- 46 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Blaine County, NE
The radar
The North Platte radar (KLNX), 50 km from the middle of the area, began a volume at 11:27 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, 6:45 AM CDT | Hail 0.75 | Brewster, 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, 11.4 hours before the alert went out and 101 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
- 75 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1673 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 105 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 211124 RRA SVRLBF NEC009-211210- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 624 AM CDT THU AUG 21 1997 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 710 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL NEBRASKA ...EASTERN BLAINE COUNTY AT 622 AM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE DOPPLER RADAR 35 MILES SOUTH OF AINSWORTH OR 7 MILES NORTH OF BREWSTER MOVING SOUTHEAST AT 30 MPH. DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... BREWSTER BY 630 AM CDT IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM TRHE STORM IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. COGIL
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, 3:57 AM CDT, 2 hours 27 minutes earlier.
Area forecast discussion, Aug 21, 3:57 AM CDT, 2 hours 27 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
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 7:37 PM CDT | Severe Thunderstorm Warning | LBF | Chase | 63 min |
| Aug 21, 5:24 AM CDT | Severe Thunderstorm Warning | LBF | Brown | 46 min |
| Aug 21, 7:00 AM CDT | Severe Thunderstorm Warning | LBF | Custer | 65 min |
| Aug 21, 7:17 AM CDT | Severe Thunderstorm Warning | LBF | Cherry | 48 min |
| Aug 21, 2:19 PM CDT | Severe Thunderstorm Warning | LBF | Garfield | 31 min |
| Aug 21, 6:16 PM CDT | Severe Thunderstorm Warning | LBF | Deuel, Keith | 49 min |
| Aug 21, 6:30 PM CDT | Severe Thunderstorm Warning | LBF | Keith | 50 min |
| Aug 21, 6:56 PM CDT | 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.