Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 56, NWS North Platte, NE

June 19, 1997Perkins County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 19, 1997, 6:20 PM MDT for Perkins County, Nebraska. It was in force for 60 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 19, 1997, 6:20 PM MDT (00:20 UTC)
Expired: Jun 19, 1997, 7:20 PM MDT
In force: 60 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Perkins County, NE

The radar

The North Platte radar (KLNX), 152 km from the middle of the area, began a volume at 00:20 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 19, 6:30 PM MDT	Hail 0.75	Madrid, 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
Jun 19, 2:15 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.3 hours before the alert went out and 93 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: 275 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 3064 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

379 
WUUS1 KLBF 200020 RRA
SVRLBF
NEC135-200120-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
720 PM CDT (620 PM MDT) THU JUN 19 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 720 PM MDT (820 PM CDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN NEBRASKA

   ...EASTERN PERKINS COUNTY
 
AT 617 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE
DOPPLER RADAR 21 MILES SOUTH SOUTHEAST OF OGALLALA OR 8 MILES WEST
OF ELSIE MOVING EAST SOUTHEAST AT 30 MPH.

DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR...
  ELSIE                        BY 625 PM MDT
  GRAINTON                     BY 640 PM MDT

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

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING FOR WESTERN
PERKINS COUNTY.
 
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.

WOOD

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 19, 1:06 PM MDT, 5 hours 14 minutes earlier.

Area forecast discussion, Jun 19, 1:06 PM MDT, 5 hours 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
200 PM CDT THU JUN 19 1997

MAIN FORECAST PROBLEM...ONCE AGAIN THE DEVELOPMENT AND PROPAGATION OF
MCS DEVELOPING THIS AFTERNOON OR EVENING...

SURFACE...ISENTROPIC...AND THETA-E ANALYSES AT 12Z INDICATE THAT THE LOW
LEVEL TEMPERATURE GRADIENT...850MB THETA-E RIDGE...AND SURFACE TROUGH
COME TOGETHER JUST NORTHWEST OF BBW WITH SIGNIFICANT ISENTROPIC FORCING
ON THE 310K THETA SURFACE. AS EVERYTHING SHIFTS EAST ON THE MID
TROPOSPHERIC WESTERLIES AND THE SFC LOW COMES INTO NORTHWEST
NEBRASKA...THE ISENTROPIC FORCING WILL INTENSIFY AND THE JUNCTION OF
THE FRONT...MOISTURE RIDGE...AND SURFACE TROUGH MOVES INTO THE VICINITY
OF OFK LATE THIS AFTERNOON. COMBINING THAT WITH SFC BASED LI'S IN THE
-2 RANGE...WOULD EXPECT CONVECTION TO FIRE IN THE AREA. WITH MCS BACK
BUILDING IN 1000-500MB THICKNESS DIFFLUENCE ALONG THE S. DAK/NEB
LINE...I'M GUESSING THAT THE CONVECTIVE SYSTEM COULD BUILD BACK AS FAR
AS ANW OR VTN. PRECIPITABLE WATER IN WESTERN NEBRASKA HAS DROPPED TO
ABOUT 0.9 INCH TODAY FROM 1.1 YESTERDAY...BUT THAT IS STILL ENOUGH TO
LIGHT OFF SOME CONVECTION IN THE SOUTHWEST PART OF THE STATE. SO SOME
MENTION OF POP IS APPROPRIATE IN THE WESTERN AND SOUTHWEST ZONES IT
APPEARS THAT THE AREA NORTH AND EAST OF A MRR-BBW LINE SHOULD BE HIT
PRETTY HARD WITH STRONGER LANGUAGE LIKE SCATTERED THUNDERSTORMS WHILE
THE REST OF THE LBF CWA COULD PROBABLY BE COVERED BY 30 OR 40 PERCENT
PROBABILITIES.

FOR THE REST OF THE FORECAST PERIODS...PRESENT FORECAST LOOKS GOOD
PRECIPITATION WISE IN LIGHT OF ETA/NGM/AVN SOLUTIONS WHICH ARE SIMILAR.
BUT...FOR TEMPERATURES...THE NGM AND AVN ARE BOTH A CATEGORY COOLER
THAN THE PRESENT FORECAST INDICATES FOR FRIDAY. SO...BACKING OFF A
CATEGORY IN FRIDAY'S HIGHS APPEARS TO BE APPROPRIATE. THE NGM
TEMPERATURE GUIDANCE HAS BEEN DOING WELL...BUT GUIDANCE FOR VTN SEEMS
TO BE ABOUT 5 DEGREES TOO LOW. AVN NUMBERS SEEM A LITTLE MORE
REASONABLE. FOR LBF, FAN AND FWC ARE NEARLY IDENTICAL. HAVE
EXTRAPOLATED TEMPERATURES FOR ANW,ONL,BBW FROM FWCOFK AND FANLBF (FOR
VTN).

RECOMMENDED FORECAST

NEZ005>010-025>029-038-200915-
CHERRY-KEYA PAHA-BOYD-BROWN-ROCK-HOLT-THOMAS-BLAINE-LOUP-GARFIELD-
WHEELER-CUSTER-
INCLUDING THE COMMUNITIES OF VALENTINE...AINSWORTH...O NEILL...
BURWELL...BROKEN BOW
400 PM CDT THU JUN 19 1997

.TONIGHT...SCATTERED THUNDERSTORMS. LOW 60 TO 65. WIND BECOMING NORTH
10 TO 20 MPH.
.FRIDAY...PARTLY CLOUDY AND A LITTLE COOLER.  HIGH 80 TO 85.  NORTHEAST
WIND 10 TO 15 MPH.
.FRIDAY NIGHT...PARTLY CLOUDY.  LOW IN THE MID 50S.
.SATURDAY...PARTLY CLOUDY.  HIGH 80 TO 85.

NEZ004-022>024-035>037-056>059-069>071-200915-
SHERIDAN-GARDEN-GRANT-HOOKER-ARTHUR-MCPHERSON-LOGAN-DEUEL-KEITH-
PERKINS-LINCOLN-CHASE-HAYES-FRONTIER-
INCLUDING THE COMMUNITIES OF MULLEN...OGALLALA...NORTH PLATTE...
IMPERIAL
400 PM CDT THU JUN 19 1997

.TONIGHT...A 40 PERCENT CHANCE OF THUNDERSTORMS.  LOW 55 TO 60.  WIND
BECOMING NORTH 10 TO 20 MPH.
.FRIDAY...PARTLY CLOUDY AND A LITTLE COOLER.  HIGH IN THE MID 80S.
NORTHEAST WIND 10 TO 15 MPH.
.FRIDAY NIGHT...PARTLY CLOUDY.  LOW 50 TO 55.
.SATURDAY...PARTLY CLOUDY.  HIGH IN THE MID 80S.

VTN BB 059/08B3 054/084 49500
ANW BB 061/082 057/083 49600
ONL BB 060/080 056/082 49600
BBW BB 061/083 054/084 49500
LBF BB 058/084 054/085 49400
OGA BB 058/085 054/086 49400
IML BB 060/086 060/087 49400

SPRINGER

In the hours before

Local storm report, Jun 19, 4:58 PM MDT, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
558 PM CDT THU JUN 19 1997

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

0530 PM    8 S MERRIMAN              NE   0.75 INCH HAIL
06/19/97   CHERRY

WERT

Local storm report, Jun 19, 6:15 PM MDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
715 PM CDT THU JUN 19 1997

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

0714 PM    2 N GRANT                 NE   1.00 INCH HAIL
06/19/97   PERKINS

SLM

Local storm report, Jun 19, 6:16 PM MDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
715 PM CDT THU JUN 19 1997

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

0714 PM    2 N GRANT                 NE   1.00 INCH HAIL
06/19/97   PERKINS

SLM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 6:13 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Rock	62 min
Jun 19, 7:15 PM MDT	Severe Thunderstorm Warning	LBF	Holt	65 min
Jun 19, 9:49 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	31 min
Jun 19, 10:23 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	47 min
Jun 20, 4:13 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	62 min
Jun 20, 4:52 PM MDT	Tornado Warning	LBF	Sheridan	33 min
Jun 20, 5:25 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	60 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.