Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 179, NWS North Platte, NE

August 13, 1997Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 13, 1997, 4:50 PM CDT for Custer County, Nebraska. It was in force for 60 min. 3 reports 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 13, 1997, 4:50 PM CDT (21:50 UTC)
Expired: Aug 13, 1997, 5:50 PM CDT
In force: 60 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Custer County, NE

The radar

The North Platte radar (KLNX), 94 km from the middle of the area, began a volume at 21:54 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
Aug 13, 5:00 PM CDT	Hail 0.75	Broken Bow, NE
Aug 13, 5:45 PM CDT	Hail 1	Broken Bow, NE
Aug 13, 6:00 PM CDT	Hail 0.75	Oconto, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 13, 3:15 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.8 hours before the alert went out and 79 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 95 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 834 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KLBF 132151 RRA
SVRLBF
NEC041-132250-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
450 PM CDT WED AUG 13 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 550 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL NEBRASKA

   ...CENTRAL CUSTER COUNTY
 
AT 450 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH
PLATTE DOPPLER RADAR 4 MILES SOUTH SOUTHWEST OF BROKEN BOW MOVING
EAST AT 25 MPH.

DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR...
  BERWYN                       BY 505 PM CDT
  WEISSERT                     BY 515 PM CDT
  ANSLEY                       BY 520 PM CDT
  WESTERVILLE                  BY 520 PM CDT



 A TORNADO WATCH IS ALSO IN EFFECT.  SEVERE THUNDERSTORMS CAN
PRODUCE TORNADOES.
 
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 CROSSINGS.

FS/MP

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 13, 2:30 PM CDT, 2 hours 20 minutes earlier.

Area forecast discussion, Aug 13, 2:30 PM CDT, 2 hours 20 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
230 PM CDT WED AUG 13 1997

EXTENT OF TSRA TONIGHT IS THE MAIN QUESTION FOR THE NEAR TERM...

18Z SFC ANALYSIS SHOWS LEE TROF DEEPENING IN ERN PANHANDLE COUNTIES WITH
SURFACE MOISTURE CONVERGENCE INCREASING AS WELL AS PER ADAP SMC. LOW
DEVELOPING NEAR CDR AND BFF REPORTING TCU AT 19Z OB...AND MORE CU NEAR
LAKE MAC. ADAP ALSO HAS INSTABILITY AXIS ALONG TROF WITH RELATIVELY NO CAP.
WIND PROFILES ON ZAR VEERING WITH HEIGHT AND MEDICINE BOW PROFILER SHOWING
MID LEVEL SPEED MAX APPROACHING.

ETA CONTINUES TO BE A TAD FASTER WITH ITS SHORT WAVE MOVING ACROSS SD. NGM
IDENTIFIES A SECOND MAX FURTHER SW OF MAIN WAVE WHICH LOOKS BEST BASED ON
WV IMAGERY. ETA 12HR SFC FORECAST APPEARS TO LOOK BEST HOWEVER WITH LOW
DEVELOPING IN NWRN NEB BY 00Z THU. ISENTROPIC ANALYSIS INDICATES STRONG
PRESSURE ADVECTION ALONG/VCNTY OF SFC TROF BY LATE AFTERNOON...FROM NEAR
RUSHVILLE TO OGA TO IML. TSRA SHOULD DEVELOP SHORTLY IN THIS AREA. ONCE
DEVELOPED...ZAR AND KLNX 88D SHOWING GOOD VEERING WITH HEIGHT SO SUPERCELLS
POSSIBLE. BOUNDARY ALSO LOCATED FROM NEAR RAP TO N OF BBW IS LIKELY A WARM
FRONT WHERE BEST WARM AIR ADVECTION AHEAD OF SFC TROF IS OCCURING...LEADING
TO TSRA DEVELOPMENT IN THE NC. THIS TSRA SHOULD BE ONGOING AT THE TIME OF
ZONE ISSUANCE SO CAT WORDING NEEDED THERE. LOW LEVEL Q-N FORCING SHOULD
MOVE INTO CENTRAL NEBRASKA OVERNIGHT.

MS SKIES SHOULD PREVAIL ON THURSDAY IN THE W WITH LINGERING MORNING CLOUDS
IN NERN CWA. ETA GRIDDED DATA HINTS AT SECOND WAVE MOVING THRU THURSDAY
LATE AFTERNOON AND WILL INCLUDE SMALL POPS FOR THE W.

GUIDANCE SHOWS THE NICE WAMRUP FOR THURSDAY INTO TH FRIDAY BEFORE HEIGHTS
DECREASE FOR THE WEEKEND. COLD FRONT SHOULD COME THRU LATE FRIDAY. GUIDANCE
MAXES SIMILAR FOR THE PERIOD AT LEAST FOR THE SW AND LOOK REASINABLE BASED
ON TODAYS HAPPENINGS. MINS ALSO SIMILAR. WINDS IN THE 10-20 MPH RANGE FROM
THE NW AFTER TROF PASSAGE FOR THURSDAY.

LBF UB 056/088 060/090 056 695-2
OGA UB 056/088 061/092 057 695-2
IML UB 058/088 060/092 057 694-1
VTN UB 057/088 056/087 056 695-2
ONL BB 059/082 062/083 060 69+23

STOPPKOTTE

In the hours before

Special weather statement, Aug 13, 1:17 PM CDT, 3 hours 33 minutes before

NEZ004>010-022>029-035>038-056>059-069>071-141200-

SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA
NATIONAL WEATHER SERVICE NORTH PLATTE NE...UPDATED...
118 PM CDT (1218 PM MDT) WED AUG 13 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 NORTH CENTRAL
NEBRASKA THIS AFTERNOON...AND IN WESTERN NEBRASKA LATER THIS AFTERNOON
INTO TONIGHT...

THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS THIS AFTERNOON EAST OF
A LINE FROM AINSWORTH TO BREWSTER. THERE IS ALSO A CHANCE FOR SEVERE
THUNDERSTORMS THIS AFTERNOON AND TONIGHT WEST OF A LINE FROM VALENTINE
TO BROKEN BOW.

SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP IN PARTS OF NORTH
CENTRAL NEBRASKA THROUGH THE AFTERNOON AS SHOWERS FURTHER EAST CONTINUE
TO PUSH EASTWARD. INSTABILITY WILL CONTINUE TO INCREASE BEHIND THE
SHOWERS IN THIS AREA ALLOWING THESE STORMS...MAINLY EAST OF A LINE FROM
AINSWORTH TO BREWSTER...TO HAVE THE POTENTIAL TO PRODUCE SEVERE WEATHER
MAINLY IN THE FORM OF LARGE HAIL THROUGH THE AFTERNOON HOURS.

FURTHER WEST...ABUNDANT SUNSHINE WILL CONTINUE TO DESTABILIZE THE
ATMOSPHERE WEST OF A LINE FROM MERRIMAN TO OGALLALA THROUGH THE
AFTERNOON. AN UPPER LEVEL DISTURBANCE WILL INTERACT WITH A DEVELOPING
AREA OF LOW PRESSURE IN THIS AREA AS WELL BY LATE AFTERNOON. SCATTERED
THUNDERSTORMS ARE EXPECTED TO DEVELOP IN AN AREA FROM NEAR RUSHVILLE TO
OGALLALA AFTER 200 PM MDT. WITH THE INCREASING INSTABILITY AND
FAVORABLE WINDS THROUGHOUT THE ATMOSPHERE...SOME STORMS WILL HAVE THE
POTENTIAL TO BECOME SEVERE QUICKLY AFTER DEVELOPMENT. THE MAIN THREAT
OF SEVERE WEATHER WILL BE IN THE FORM OF LARGE AHIL AND DAMAGING WINDS.
THUNDERSTORMS ARE THEN EXPECTED TO SPREAD EASTWARD THROUGH THE EVENING
WITH THE POTENTIAL FOR SEVERE WEATHER CONTINUING INTO SOUTHWEST AND
PARTS OF CENTRAL NEBRASKA.

STAY TUNED TO NOAA WEATHER RADIO FOR UPDATES ON THIS POTENTIAL SEVERE
WEATHER SITUATION.

STOPPKOTTE

Local storm report, Aug 13, 1:22 PM CDT, 3 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
122 PM CDT WED AUG 13 1997

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1255 PM    28 S LONG PINE            NE   0.75 INCH HAIL
08/13/97   BROWN

0108 PM    32 SSW AINSWORTH          NE   1.75 INCH HAIL
08/13/97   BROWN

0110 PM    3 N BREWSTER              NE   0.75 INCH HAIL
08/13/97   BLAINE

0102 PM    6 N BREWSTER              NE   0.75 INCH HAIL
08/13/97   BLAINE

SLM

Local storm report, Aug 13, 1:24 PM CDT, 3 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
122 PM CDT WED AUG 13 1997

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1255 PM    28 S LONG PINE            NE   0.75 INCH HAIL
08/13/97   BROWN

0108 PM    32 SSW AINSWORTH          NE   1.75 INCH HAIL
08/13/97   BROWN

0110 PM    3 N BREWSTER              NE   0.75 INCH HAIL
08/13/97   BLAINE

0102 PM    6 N BREWSTER              NE   0.75 INCH HAIL
08/13/97   BLAINE

SLM

Local storm report, Aug 13, 4:18 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
418 PM CDT WED AUG 13 1997

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0140 PM    5  NE BREWSTER            NE   0.75 INCH HAIL
08/13/97   BLAINE

0300 PM    11 NNW BREWSTER           NE   0.75 INCH HAIL
08/13/97   BLAINE

SLM

Local storm report, Aug 13, 4:19 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
418 PM CDT WED AUG 13 1997

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

014R0 PM    5  NE BREWSTER            NE   0.75 INCH HAIL
08/13/97   BLAINE

0300 PM    11 NNW BREWSTER           NE   0.75 INCH HAIL
08/13/97   BLAINE

SLM

Local storm report, Aug 13, 4:50 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
450 PM CDT WED AUG 13 1997

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0405 PM    9 NW CALLAWAY             NE   1.00 INCH HAIL
08/13/97   CUSTER

0335 PM    5 E ARNOLD                NE   0.88 INCH HAIL
08/13/97   CUSTER

0300 PM    8 E GANDY                 NE   0.75 INCH HAIL
08/13/97   LOGAN

SLM

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 13, 12:53 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown	47 min
Aug 13, 1:37 PM CDT	Severe Thunderstorm Warning	LBF	Blaine	33 min
Aug 13, 2:10 PM CDT	Tornado Warning	LBF	Loup	30 min
Aug 13, 2:41 PM CDT	Severe Thunderstorm Warning	LBF	Loup	34 min
Aug 13, 2:55 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown	50 min
Aug 13, 2:59 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Logan	51 min
Aug 13, 3:49 PM CDT	Severe Thunderstorm Warning	LBF	Custer	61 min
Aug 13, 4:32 PM CDT	Severe Thunderstorm Warning	LBF	Loup	48 min
Aug 13, 5:26 PM CDT	Severe Thunderstorm Warning	LBF	Garfield, Loup	64 min
Aug 13, 5:53 PM CDT	Tornado Warning	LBF	Custer	32 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1997 Every 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.