Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 230, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Sep 4, 1997, 8:35 PM MDT for Cherry 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
- Sep 4, 1997, 8:35 PM MDT (02:35 UTC)
- Expired
- Sep 4, 1997, 9:10 PM MDT
- In force
- 35 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 02:35 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 |
|---|---|---|---|
| Sep 4, 8:37 PM MDT | Hail 1.75 | 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, 2.6 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
- 241 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 1565 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 79 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 050236 RRA SVRLBF NEC031-050310- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 935 PM CDT (835 PM MDT) THU SEP 4 1997 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1010 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL NEBRASKA ...EXTREME NORTHEASTERN CHERRY COUNTY AT 934 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE DOPPLER RADAR IN THE VICINITY OF VALENTINE MOVING NORTHEAST AT 30 MPH. DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED IN RURAL AREAS NORTH OF VALENTINE. 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. 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 Sep 4, 2:09 PM MDT, 6 hours 26 minutes earlier.
Area forecast discussion, Sep 4, 2:09 PM MDT, 6 hours 26 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-042015- AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 307 PM CDT (207 PM MDT) THU SEP 4 1997 ...TIMING...STRENGTH...AND LOCATION OF SHORTWAVES ALL MATTERS OF CONCERN... MODELS ALL DIFFERENT IN DEPICTION OF SHORTWAVES THAT WILL/MIGHT MOVE ACROSS REGION NEXT 48 HOURS. ETA SEEMS TO HAVE INITIALIZED BEST...AT LEAST WITH SHORTWAVE MOVING THROUGH CO THIS AFTERNOON...BUT HAVE DOUBTS ABOUT WHAT IT DOES WITH CONVECTION BY 36 HOURS. INTERESTINGLY...THE AFOS GRAPHIC FOR 12 HOUR PRECIP ENDING AT 36 HOURS INDICATES A MAX OF 0.14 INCHES...WHILE THE GRIB DATA AS DISPLAYED IN PCGRIDDS INDICATES A MAX OF 0.76 INCHES. LOCATIONS ARE VERY SIMILAR...BUT MAXES OBVIOUSLY DIFFER BY A FACTOR OF ABOUT 5. THIS ISNT CRITICAL TO THE FORECAST...ITS JUST INTERESTING. AGREE WITH AFDOMA ON HOW NEXT COUPLE DAYS WILL PLAY OUT. WILL NEED POPS IN EVENINGS AND NIGHTS WITH BOUNDARY LYING TO SOUTH OF CWA AND WAA EXPECTED. TIMING WILL BE IMPOSSIBLE TO PINPOINT. VERIFICATION PROGRAM SHOWS GUIDANCE MINS HAVE BEEN TOO COOL AND MAXES TOO WARM LAST COUPLE DAYS DUE TO EXTENSIVE CLOUD COVER...BUT WITH TROF PASSAGE WOULD ANTICIPATE CLOUD COVER IN LBF CWA WILL NOT BE AS EXTENSIVE AS IN PAST FEW DAYS. CCF: LBF 59/86/60/87/60 1/1/2 VTN 57/86/56/88/59 2/1/2 OGA 56/87/56/87/55 2/1/2 ONL 58/86/59/87/58 2/1/2 SP
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 6:01 PM MDT | Severe Thunderstorm Warning | LBF | Garden, Grant | 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.