Severe Thunderstorm Warning 129, NWS North Platte, NE

Issued

Jul 21, 1997, 8:52 PM MDT (02:52 UTC)

Expired

Jul 21, 1997, 9:40 PM MDT

In force

48 min

Issued by

NWS North Platte, NE

Area

Whole counties

County Arthur County, NE

The North Platte radar (KLNX), 102 km from the middle of the area, began a volume at 02:51 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.

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.

000 
TTAA00 KLBF 220252 RRA
SVRLBF
NEC005-220340-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
952 PM CDT (852 PM MDT) MON JUL 21 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 940 PM MDT (1040 PM CDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN WEST CENTRAL NEBRASKA

   ...SOUTHEASTERN ARTHUR COUNTY
 
AT 849 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE
DOPPLER RADAR 27 MILES NORTH NORTHEAST OF OGALLALA OR 6 MILES EAST
SOUTHEAST OF ARTHUR MOVING SOUTH AT 15 MPH.

THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS SOUTHEAST OF ARTHUR.
NICKEL SIZED HAIL WAS REPORTED FROM THIS STORM 5 MILES EAST OF
ARTHUR AT 840 PM MDT.

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING WHICH HAD
BEEN IN EFFECT FOR NORTHEAST ARTHUR COUNTY UNTIL 910 PM MDT.
 
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH
LITTLE OR NvO ADVANCE WARNING.  IF YOU ARE IN THE PATH OF THIS STORM
YOU SHOULD MOVE INSIDE A STRONG BUILDING AND GO TO THE LOWEST FLOOR
POSSIBLE.

&

WERT

NWS North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 1:48 PM MDT, 7 hours 4 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
245 PM CDT MON JUL 21 1997

CHANCE FOR TSRA AND TEMPS THE MAIN FORECAST TRICK...

STATIONARY FRONT PER 18Z ANALYSIS LOCATED FROM SRN IA SWWD INTO SWRN KS WITH
SEPARATE TROF/CONVERGENCE LINE FROM NW KS INTO NERN CO...THEN TO SRN WY.
TSRA ALREADY GOING ALONG LATTER BOUNDARY. ANOTHER WEAK BOUNDARY SHOWING UP
ON KLNX 88D AND SAT PICS ACROSS NRTHN PORTION OF CWA JUST SOUTH OF SD BORDER
FROM CHERRY CO TO NEAR CDR. GOOD AREA OF SUBSIDENCE IN THE WAKE OF MORNING
CONVECTIVE SYSTEM WHICH FELL APART ACROSS NC NEBR.

ETA/NGM SIMILAR IN TAKING BEST SYNOPTIC SCALE FORCING NORTH OF CWA INTO
THE DAKOTAS OVERNIGHT. HOWEVER...BEST FORCING TO GENERATE TSRA LIKELY TO
COME FROM MESOSCALE CONVERGENCE ALONG ANY OF THE AFOREMENTIONED BOUNDARIES.
ADAP HAS BEST INSTABILITY AXIS JUST NORTH OF STATIONARY FRONT IN SRN NEBR
WITH WEAKEST CAP HERE AS WELL. BELIEVE THO THAT CAP IN SRN WY SHOULD BE
BREAKING SOON AND WOULD EXPECT FURTHER DEVELOPMENT IN SE WY BY LATE
AFTERNOON. ANY STORMS THAT DO FIRE WILL HAVE THE POTENTIAL TO PRODUCE VERY
HEAVY RAINS BASED 17Z LBF SOUNDING WHICH HAS PRECIP WATER VALUES NEAR 1.4
INCHES AND A 4-5000 FT CLOUD LAYER WARMER THAN  ZERO DEGREES C. SVR CHANCES
AS WELL..BUT LIMITED DUE TO WARM WET BULB FREEZING LEVELS. POPS WILL
THERFORE BE INCLUDED IN ALL ZONES...WITH LATEST TIME FRAME IN ANW/ONL AREAS.
BY EVENING...CAPES NEAR 4000 J/KG AND LI OF -6 TO -8 LIKELY ACROSS THE W.

WEAK FORCING INDICATED THRU 48 HRS...BUT TSRA MAY DEVELOP AGAIN ON TUES
WITH LEFT OVER BOUNDARIES. WARMER MID LEVEL TEMPS MAY LIMIT THIS SOME.
GUIDANCE POPS LOW DUE TO LACK OF SYNOPTIC SCALE FORCING AND WILL GENERALLY
GO ABOVE THEM TONIGHT...BUT CLOSER ON TUES. FWC MAXES SIGNIFICANTLY
WARMER THAN FAN...AND WILL GENERALLY GO BETWEEN THE TWO BASED ON RECENT
TRENDS. FAN MINS HAVE BEEN HARD TO BEAT LATELY AND WILL THEREFORE FOLLOW.

LBF UU 059/089/062/091 063  69312      VTN UB 061/090/063/093 064  69422
OGA UU 060/091/063/092 064  69312      ONL BB 063/088/065/090 065  69322
IML UU 060/090/063/092 065  69312

STOPPKOTTE

Severe Thunderstorm Warnings in Nebraska, 1997Every severe thunderstorm warning in 1997

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.