Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 81, NWS North Platte, NE

May 26, 1998Garden County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 26, 1998, 8:55 PM MDT for Garden County, Nebraska. It was in force for 65 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
May 26, 1998, 8:55 PM MDT (02:55 UTC)
Expired
May 26, 1998, 10:00 PM MDT
In force
65 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Garden County, NE

The radar

The North Platte radar (KLNX), 151 km from the middle of the area, began a volume at 02:59 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 nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.9 hours before the alert went out and 155 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 1998-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 631 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 1998-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
631 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1448 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
218 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 270251 RRA
SVRLBF
NEC069-270400-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
955 PM CDT (855 PM MDT) TUE MAY 26 1998

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL GARDEN COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 1000 PM MDT (1100 PM CDT)

* AT 854 PM MDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 41 MILES NORTHEAST OF SIDNEY OR 6 MILES SOUTH OF
  CRESCENT LAKE MOVING NORTHEAST AT 35 MPH.

* DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR...
  CRESCENT LAKE                BY 900 PM MDT

DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY
BUI$LDING AND STAY AWAY FROM WINDOWS!

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 May 26, 2:15 PM MDT, 6 hours 40 minutes earlier.

Area forecast discussion, May 26, 2:15 PM MDT, 6 hours 40 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
315 PM CDT TUE MAY 26 1998

MAIN FORECAST CONCERN IS MOISTURE FOR TSRA DEVELOPMENT TONIGHT THROUGH
NOONTIME WEDNESDAY...

VISIBLE SATELLITE LOOP INDICATES BAND OF CLOUDS FORMING IN WESTERN KS
NORTH INTO WRN NEB. LOW LEVEL JET TO 35 KTS INCREASING LOWER MOISTURE
SUPPLY IN AREA OF CONVERGENCE OVER THE HIGHER PLAINS WITH 18Z SFC
ANALYSIS INDICATING DWPTS IN THE MID 50S. WND PROFILER NETWORKS TO THE
SOUTH AND SOUTHWEST SUGGEST INFLUENCE OF UPPER SHORTWAVE ALREADY
APPROACHING NERN CO AS WIND BACKING IN ITS APPROACH...WHICH WOULD BE
AHEAD OF MODEL GUIDANCES.

18Z SOUNDING LAUNCHED HERE WITH MODIFIED SOUNDING PRODUCING LI OF -4
AND NO CAP EVIDENT...SOUNDING HAS MOISTEN SINCE 12Z. CONVECTIVE
TEMPERATURE WAS 72 IN WRN NEB WITH CUMULUS STARTING TO TOWER. MODELS
ARE CLOSER THIS PERIOD WITH AVN/ETA SIMILAR AS PACIFIC SYSTEM MOVES
INLAND. GREATEST HEIGHT FALLS OCCURRED ACROSS SRN UTAH WITH SLOWER AVN
MODEL HANDLING SYSTEM BETTER. GRIDDED DATA INDICATED 5H SHORTWAVE TO
MOVE IN AROUND MIDNIGHT HOWEVER OBSERVATIONS AND PROFILERS WOULD
SUGGEST THE MODELS ARE NOT PICKING UP WAVES MOVING THROUGH FLOW WELL.
INCREASING DIFFLUENT FLOW ALOFT...MOISTURE SUPPLY AND LOW LEVEL
CONVERGENCE TO MAINTAIN THUNDERSTORM ACTIVITY ONCE GOING WITH MAIN
ACTIVITY ACROSS CWA EXPECTED FROM MIDNIGHT THROUGH NOONTIME IN CWA.

THETA-E RIDGE MOVES INTO THE WRN PANHANDLE THIS EVENING...THEN MOVES
NORTHEAST EXITING THE NCTRL WEDNESDAY AFTERNOON. TIMESECTIONS INDICATE
MOISTURE BAND TO BE NARROW WITH CLEARING SKIES BY EARLY MORNING IN THE
WEST AS LOW LEVEL JET WINDS SHIFT SOUTHWEST WITH MOISTURE CHANNELING
MORE TO THE NORTHEAST. TEMPERATURES TONIGHT WILL BE CLOSE TO GUIDANCE AS
SLY WIND CONTINUE AND SFC TROUGH AXIS REMAINS WEST THROUGH 27/12Z.

WEDNESDAY LEESIDE TROUGH MOVES EAST AND LIES NEAR LINE FROM ONL TO GLD
BY EVENING. MODELS INDICATING MOISTURE QUICKLY DRYING OUT BEHIND TROUGH
AXIS BUT PRESENT SATELLITE AND WV IMAGERY SHOWS MARITIME CONNECTION
WHICH SHOULD AT LEAST KEEP SOME CIRRUS OVERHEAD. TEMPERATURE GUIDANCE
HAS BEEN RUNNING HIGH AND WILL GO ON THE COOLER END. WIDELY SCATTERED
THUNDERSTORMS WILL BE POSSIBLE AS LEESIDE TROUGH REMAINS FOCUS FOR
DEVELOPMENT. TEMPERATURE GUIDANCES LOOKS REASONABLE AND WILL STAY
CLOSE.

WEDNESDAY NIGHT INTO THURSDAY SUBSIDENCE TO INCREASE IN THE NORTHWEST
AS SURFACE HIGH RIDGES IN AND UPPER RIDGE BUILDS WITH BROAD FLOW ALOFT.
SFC LOW REMAINS ACROSS NWRN KS WITH LIMITED MOISTURE AVAILABLE.

PRELIMINARY GUIDANCE FOR COORDINATION ONLY. OFFICIAL FORECASTS ARE
CONTAINED WITHIN PRODUCT OMAZFPNE...

CCF
LBF BB 053/081 052/086 055 320
OGA BB 055/082 052/088 055 320
ONL EB 050/081 055/083 055 23-
VTN BB 054/079 050/086 048 420

WOOD

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 4:22 AM MDTSevere Thunderstorm WarningLBFBlaine, Custer63 min
May 27, 5:19 AM MDTSevere Thunderstorm WarningLBFCuster, Loup66 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1998Every severe thunderstorm warning in 1998

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.