Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 84, NWS North Platte, NE

June 4, 1999Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 4, 1999, 11:41 PM MDT for Cherry County, Nebraska. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 4, 1999, 11:41 PM MDT (05:41 UTC)
Expired: Jun 5, 1999, 12:45 AM MDT
In force: 64 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 05:41 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.

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 4, 5:45 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 5.7 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.

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: 2730 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1707 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 8.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 050540
SVRLBF
NEC031-050645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1241 AM CDT (1141 PM MDT) SAT JUN 5 1999

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CHERRY COUNTY IN NORTH CENTRAL NEBRASKA

* UNTIL 145 AM CDT

* AT 1238 AM CDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 27 MILES NORTHWEST OF VALENTINE OR 7 MILES NORTHEAST
  OF NENZEL... MOVING NORTH AT 10 MPH.

THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS NORTH OF HIGHWAY 20
BETWEEN CODY...NENZEL AND KILGORE.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY "AWAY FROM WINDOWS!

RLB

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 4, 12:35 PM MDT, 11 hours 6 minutes earlier.

Area forecast discussion, Jun 4, 12:35 PM MDT, 11 hours 6 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
135 PM CDT FRI JUN 4 1999

...FORECAST CHALLENGE...WHERE WILL THE CAP BREAK FIRST?...

...SYNOPSIS...VOLATILE ATMOSPHERIC CONDITIONS ACROSS ENTIRE CWA PUTS
MOST OF IT IN MDT RISK FOR THIS AFT/EVENING. FAIRLY STRONG CAP LIKELY
TO SUPPRESS ANYTHING FROM FIRING OVER SOUTHWEST NEB. AT THE
SURFACE...LOW PRESSURE CENTERED OVER NERN CO/SW NEBRASKA WITH DRY LINE
FROM NEAR GORDON SOUTH TO BETWEEN OGA AND LBF...CONT SOUTH. ATMOSPHERE
REMAINS UNSTABLE THROUGH SATURDAY...WITH GOOD S/W COMING EXPECT TO SEE
ANOTHER ROUND OF MORE WIDESPREAD CONVECTION.

...MODEL PERFORMANCE...
MRF AND ETA IN FAIR AGREEMENT...AND ETA IS THE MODEL OF CHOICE BASED ON
PAST PERFORMANCE. HAS GOOD CONSISTENCY PER D-PROG DT/AWIPS. ETA 700 MB
TEMPS VERIFYING WELL WITH 18Z SOUNDING DONE HERE.

TONIGHT...
MODERATE RISK HAS BEEN EXTENDED TO INCLUDE LBF DESPITE SIGNIFICANT CAP.
FAIR 700MB SHORTWAVE COMING IN AT ABOUT 00Z TONIGHT OVER
PANHANDLE...PERFECT TIMING TO GET THINGS GOING. EXPECTING INITIATION
NEAR TROFFINESS ENTERING NORTHERN NEB...INTERSECTING WITH LEFTOVER
OUTFLOW SOMEWHERE BETWEEN LBF AND THEDFORD. ONCE THINGS GET
GOING...SHOULD MOVE EAST SOUTHEAST. WOULD NOT BE SURPRIZED TO HAVE WW
DROPPED ON NORTH CENTRAL ZONES. NOTED THAT THINGS ARE ALREADY POPPING IN
SW KANSAS WHERE CAP IS ALSO SUPPOSED TO BE STRONG...

...SATURDAY/NIGHT...
EXPECT THERE WILL BE SOME LEFT OVER MORNING STRATUS AGAIN...PERHAPS NEAR
VTN THIS TIME. EXPECT IT WILL BURN OFF BY MID-LATE MORNING. 700 MB TEMPS
FALL SOME...WITH GOOD S/W ENTERING AREA.  OUR CWA IS ONCE AGAIN
OUTLOOKED IN THE MODERATE RISK. EXPECT MORE WIDESPREAD CONVECTION OVER
CWA INCLUDING SW. STILL GOOD OMEGA OVER MOST OF CWA AT SAT
06Z...BEGINNING TO SETTLE DOWN BY 12Z. GOING SOMEWHAT ABV FWC FOR AFT
HIGHS.

...SUNDAY...
EXPECT SOME LINGERING SHOWERS...THEN DRYING OUT SOME ESPLY WERN ZONES
BY LATE AFTERNOON.

...EXTENDED...
LITTLE PATTERN CHANGE ON THE HORIZON UNTIL POSSIBLY MIDWEEK. MONDAY
STILL LOOKS DRY...BUT OTHERWISE EXPECT TYPICAL DIURNAL THUNDERSTORMS
WITH LOWS AROUND 60 AND HIGHS AROUND 80 SOMETHING.

.LBF...NONE

SLM

In the hours before

Local storm report, Jun 4, 7:55 PM MDT, 3 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
855 PM CDT FRI JUN 4 1999

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

0728 PM    11 N ARTHUR               NE   1.50 INCH HAIL
06/04/99   ARTHUR

0740 PM    14 SSE HYANNIS            NE   1.75 INCH HAIL
06/04/99   GRANT

GEB

Local storm report, Jun 4, 8:13 PM MDT, 3 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
913 PM CDT FRI JUN 4 1999

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

0858 PM    6 E MULLEN                NE   2.50 INCH HAIL
06/04/99   HOOKER

0903 PM    8 ENE MULLEN              NE   TORNADO
06/04/99   HOOKER                         BRIEF TORNADO TOUCHDOWN

GEB

Local storm report, Jun 4, 8:39 PM MDT, 3 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
939 PM CDT FRI JUN 4 1999

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

0921 PM    12 SSW BROWNLEE           NE   TORNADO
06/04/99   CHERRY                         TORNADO ON THE GROUND

0928 PM    10 SW BROWNLEE            NE   TORNADO
06/04/99   CHERRY                         TORNADO ON THE GROUND

GEB

Local storm report, Jun 4, 8:46 PM MDT, 2 hours 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
946 PM CDT FRI JUN 4 1999

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

0815x PM    42 S MERRIMAN             NE   0.88 INCH HAIL
06/04/99   CHERRY

GEB

Local storm report, Jun 4, 9:25 PM MDT, 2 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
1025 PM CDT FRI JUN 4 1999

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

095Z2 PM    11 NW SPRINGVIEW          NE   1.50 INCH HAIL
06/04/99   KEYA PAHA

GEB

Special weather statement, Jun 4, 10:48 PM MDT, 53 minutes before

NEZ004>006-008-009-022>027-035>038-056>059-069>071-050550-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1148 PM CDT (1048 PM MDT) FRI JUN 4 1999

...TORNADO WATCH HAS BEEN CANCELLED...

THE TORNADO WATCH THAT WAS IN EFFECT FOR MOST OF SOUTHWEST AND
NORTH CENTRL NEBRASKA UNTIL 1 AM CDT (MIDNIGHT MDT) HAS BEEN
CANCELLED. AT 1145 PM CDT (1045 PM MDT)...DOPPLER RADAR INDICATED
THAT STRONG AND SEVERE THUNDERSTORMS HAD MOVED NORTH tINTO SOUTH
DAKOTA. THE THREAT FOR SEVERE THUNDERSTORMS AND TORNADOES HAS ENDED
ACROSS NORTH CENTRAL AND SOUTHWEST NEBRASKA.

SHEETS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 6:11 PM MDT	Severe Thunderstorm Warning	LBF	McPherson	49 min
Jun 4, 6:27 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Grant	48 min
Jun 4, 7:04 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	61 min
Jun 4, 7:10 PM MDT	Severe Thunderstorm Warning	LBF	Hooker	50 min
Jun 4, 7:30 PM MDT	Tornado Warning	LBF	Hooker	35 min
Jun 4, 8:02 PM MDT	Tornado Warning	LBF	Cherry	63 min
Jun 4, 8:50 PM MDT	Severe Thunderstorm Warning	LBF	Keya Paha	35 min
Jun 4, 9:06 PM MDT	Tornado Warning	LBF	Cherry	64 min
Jun 4, 9:31 PM MDT	Tornado Warning	LBF	Brown	34 min
Jun 4, 9:50 PM MDT	Tornado Warning	LBF	Keya Paha	65 min
Jun 5, 4:21 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	44 min
Jun 5, 5:01 PM MDT	Tornado Warning	LBF	Sheridan	34 min
Jun 5, 5:02 PM MDT	Severe Thunderstorm Warning	LBF	Logan	48 min
Jun 5, 5:17 PM MDT	Severe Thunderstorm Warning	LBF	Thomas	48 min
Jun 5, 5:36 PM MDT	Tornado Warning	LBF	Sheridan	49 min
Jun 5, 5:40 PM MDT	Severe Thunderstorm Warning	LBF	Hooker	35 min
Jun 5, 5:45 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	60 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.