Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 84, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jun 27, 1997, 9:37 PM CDT for Rock 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
- Jun 27, 1997, 9:37 PM CDT (02:37 UTC)
- Expired
- Jun 27, 1997, 10:25 PM CDT
- In force
- 48 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Rock County, NE
The radar
The North Platte radar (KLNX), 106 km from the middle of the area, began a volume at 02:40 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 27, 9:40 PM CDT | Hail 1.75 | Rose, 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 172 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
- 1948 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 2588 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
289 WUUS1 KLBF 280237 RRA SVRLBF NEC149-280325- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 937 PM CDT FRI JUN 27 1997 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1025 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL NEBRASKA ...SOUTHERN ROCK COUNTY AT 935 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE DOPPLER RADAR 20 MILES SOUTHEAST OF AINSWORTH OR 10 MILES NORTHWEST OF ROSE MOVING EAST AT 25 MPH. DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... ROSE BY 950 PM CDT IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE 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. SLM
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 27, 2:51 PM CDT, 6 hours 46 minutes earlier.
Area forecast discussion, Jun 27, 2:51 PM CDT, 6 hours 46 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 250 PM CDT FRI JUN 27 1997 TSRA CHANCES CONTINUE TO BE THE MAIN FORECAST CHALLENGE... HIGH BASED TSRA BEGINNING TO FIRE IN ERN WY AS OF 1830Z AND WITH LOOK AT 12Z SOUNDINGS FROM UNR AND RIW...DRY MICROBURSTS A POSSIBILITY. VISIBLE SAT PICS SHOWING A GENERAL INCREASE IN TSRA DEVELOPMENT OVER THE FRONTRANGE ...BEHIND THE DRYLINE. CONVECTIVE TEMPS LIKELY BEING REACHED ACROSS NWRN PANHANDLE WITH CDR AT 95 AT 19Z..SO WOULD EXPECT AT LEAST SOME CU TO DEVELOP SOON. DRYLINE LOCATED SOMEWHERE BETWEEN CDR/BFF DOWN TO JUST W OF OGA... ALTHO NO SFC OB FROM SNY TO CONFIRM THIS. ADAP SUGGESTS CAP HOLDING PRETTY STRONG ACROSS THE CWA E OF PANHANDLE COUNTIES AS WARM AIR IN MID LEVELS ADVECTS IN. WEAK CONVERGENCE ALONG DRYLINE AT 18Z PER ADAP WHICH GOES ALONG WITH SFC CONVERGENCE PROGS FROM NGM AND LITTLE OR NO FRONTOGENETIC FORCING IN 850-700 MB LAYER. HOWEVER...MODIFIED LBF SOUNDING FOR LOW 90S TEMP AND MID 60S DEW POINT YIELDED 4000+ J/KG CAPE AND LI OF -9...WITH LITTLE OR NO CAP. BUT WITH WARM AIR ADVECTION ALOFT...CAP LIKELY TO BE CLOSER TO THAT SHOWN BY ADAP. WITH THE CONVERGENCE ALONG THE TROF WEAK...WILL BANK ON THE CAP HOLDING AND WILL ONLY GO WITH ISOLD OR MAYBE 20 POPS FOR WEST OF A VTN TO LBF LINE FOR TONIGHT. SAT NITE LOOKS TO BE NEARLY A REPEAT OF TODAY AS ETA 2M DATA SUGGESTS DRYLINE TO RETREAT TO THE W OVERNIGHT...THEN SLIDE EWD DURING THE DAY. SFC PROGS FROM ALL MODELS HAVE COLD FRONT STALLING ACROSS WRN SD IN TO SERN WY...BUT MAY WAFFLE A BIT DEPENDING ON AMOUNT OF CONVECTION ALONG IT TONIGHT. CONVERGENCE PROGGED TO BE BETTER ALONG TROF/DRYLINE TOMORROW THO...SO WILL BOOST POPS A BIT ESPECIALLY NRN ZONES AS PER SWODY2. FOR TEMPS....WITH FRONT REMAINING TO THE WEST...LIKE THE IDEA OF PERSISTENCE FOR MAXES AND WARM MINS BASED ON HIGH DEW POINTS. A FEW MORE CLOUDS ON SUNDAY MAY LIMIT HEATING SOME. GUIDANEC VALUES CLOSE FROM FWC/FAN AND GENERALLY WONT STRAY TOO FAR. WITH INCREASE IN CLDS W...PC WILL BE NEEDED IN SWRN ZONES TONIGHT AS WELL. LAST LOK AT KCYS 88D LEADS ME TO THINK THAT ERN PANHANDLE COUNTIES SHOULD BE IN A ZONE BY THEMSELVES AS CONVECTION MOVES INTO WRN PANHANDLE...WITH 30 POPS (OR JUST SCT EVE) IN ORDER. WILL STICK WITH PREVIOUS THINKING ELSEWHERE. LBF UU 060/093/061/088 2121 VTN UU 062/096/062/089 2122 OGA UU 062/094/063/090 2121 ONL UU 064/092/064/093 -122 IML UU 062/093/063/089 2121 ...............................STOPPKOTTE
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 8:19 PM CDT | Severe Thunderstorm Warning | LBF | Arthur, Grant, Hooker | 46 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.