Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 261, NWS North Platte, NE

August 30, 1998Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 30, 1998, 6:22 PM MDT for Cherry County, Nebraska. It was in force for 63 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
Aug 30, 1998, 6:22 PM MDT (00:22 UTC)
Expired
Aug 30, 1998, 7:25 PM MDT
In force
63 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 00:21 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, 0.4 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 1998-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 61 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 1998-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.193958Sfc1 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
61 J/kg
Mixed-layer CIN
-267 J/kg
Mixed-layer LCL
3900 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 310023
SVRLBF
NEC031-310125-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
722 PM CDT (622 PM MDT) SUN AUG 30 1998

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

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

* UNTIL 825 PM CDT

* AT 723 PM CDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 25 MILES NORTH NORTHEAST OF MULLEN OR 12 MILES WEST
  NORTHWEST OF BROWNLEE MOVING EAST SOUTHEAST AT 10 MPH.

* THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS NORTHWEST OF
  BROWNLEE.

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

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 Aug 30, 1:35 PM MDT, 4 hours 47 minutes earlier.

Area forecast discussion, Aug 30, 1:35 PM MDT, 4 hours 47 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
235 PM CDT SUN AUG 30 1998

...FORECAST CHALLENGE IS CHANCES FOR THUNDERSTORMS TONIGHT AND EARLY
MONDAY...

AT 17Z WARM FRONT WAS FROM SNY THROUGH LBF. ACCAS ASSOCIATED WITH WEAK
VORT LOBE OVER N CENTRAL CO AT 12Z SEEN ON 2 KM VIS AND KLBF 88D MOVING
THROUGH CENTRAL CWFA. MAIN FOCUS IS STRONGER SHORTWAVE IN CENTRAL MT AT
12Z WITH VORT LOBE EXTENDING INTO N CENTRAL WY AT 12Z.

MODELS IN CLOSE AGREEMENT WITH LOCATION OF H5 FEATURES THROUGH 24
HOURS...THEN NGM HAS VORT MAX IN SW NE COMPARED TO ETA WHICH HAS IT IN
THE NORTHEAST. AVN NEARLY LOOSES FEATURE AT 36 HOURS. RIGHT NOW...ETA
LOOKS LIKE BEST COMPROMISE SCENARIO AND GENERALLY FOLLOWED.

TONIGHT...WARM FRONT WILL LIFT TO ABOUT VTN TO BBW LINE BY 06Z WITH H8
FRONT CLOSER TO SD BORDER. INITIALLY...LACK OF MOISTURE BECLOW H5 LOOKS
TO BE INHIBITING FACTOR FOR THUNDERSTORMS. LOW LEVEL JET DEPICTED BY
ETA TO DEVELOP TONIGHT BRING 60 TO 70 PERCENT RH ALONG 850 FRONT BY 12Z
MONDAY. MAIN ENERGY FROM SHORTWAVE IN NW FLOW DOES NOT REACH N CENTRAL
UNTIL 12Z TO 18Z MONDAY. AREA OF DRYING SEEN ON WV MOVING INTO SW SD
AND NEB PANHANDLE SHOULD SET OFF INITIAL ROUND OF THUNDERSTORMS BY
EVENING WHICH WILL LIKELY PROPAGATE ACROSS N CENTRAL AND POSSIBLE
CENTRAL ZONES TONIGHT AND GO WITH HIGHEST POPS IN N CENTRAL AND LOW
SCATTERED TO SOUTH. WILL KEEP REST OF CWFA IN ISOLATED POPS.

DIURNAL TIMING OF MAIN ENERGY FROM SHORTWAVE WILL LIMIT CONVECTION EARLY
MONDAY...BUT MOISTURE CONVERGENCE ALONG THE FRONT SHOULD ALLOW FOR
SCATTERED SHOWERS AND THUNDERSTORMS THORUGH MORNING HOURS IN FAR
NORTH/NE. N CENTRAL AND PANHANDLE SHOULD DRY OUT MONDAY AFTERNOON WITH
INVERTED SURFACE RIDGE BUILDING INTO AREA FROM WY AND MT. CANNOT RULE
OUT ISOLATED AFTERNOON CONVECTION IN NE THROUGH SOUTH WITH FRONT
SETTLING BACK SOUTH ACROSS AREA AND WILL INTRODUCE LOW POPS THERE.
CLOUDS EARLY SHOULD LIMIT HIGHS MONDAY AND FAVOR COOLER FAN
TEMPERATURES. MONDAY NIGHT SHOULD BE MOSTLY CLEAR AND COOL AND FAN
NUMBERS ALSO FAVORED. RUNNING OUT OF TIME FOR MUCH DISCUSSION INTO
TUESDAY AND WILL GO ALONG WITH GUIDANCE OF ISOLATED POPS FOR AFTERNOON
CONVECTION AHEAD OF COLD FRONT DROPPING SOUTH INTO AREA.

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

CCF
LBF BB 059/085 054/084 055 32-
OGA BB 058/086 054/085 054 22-
ONL EB 062/083 059/085 060 34-
VTN BB 059/082 054/084 050 33-

SHEETS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 7:28 PM MDTSevere Thunderstorm WarningLBFCherry, Thomas47 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.