Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 153, NWS North Platte, NE

June 22, 1998Sheridan County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 22, 1998, 10:22 PM MDT for Sheridan County, Nebraska. It was in force for 48 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 22, 1998, 10:22 PM MDT (04:22 UTC)
Expired
Jun 22, 1998, 11:10 PM MDT
In force
48 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Sheridan County, NE

The radar

The North Platte radar (KLNX), 163 km from the middle of the area, began a volume at 04:22 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.

IssuedProductOfficeLasted
Jun 22, 7:45 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 4.4 hours before the alert went out and 178 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, Rapid City, SD at 00:00Z on 1998-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 610 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, Rapid City, SD at 00:00Z on 1998-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.1939587897117Sfc1 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
610 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
2011 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
575 m²/s²
Significant tornado parameter
0.0
Supercell composite
18.5

Open this sounding in Storm Lab

The text

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

511 
WUUS1 KLBF 230419 RRA
SVRLBF
NEC161-230510-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1122 PM CDT (1022 PM MDT) MON JUN 22 1998

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN SHERIDAN COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 1110 PM MDT (1210 AM CDT)

* AT 1020 PM MDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 20 MILES EAST SOUTHEAST OF ALLIANCE OR 3 MILES
  SOUTHWEST OF LAKESIDE MOVING EAST AT 15 MPH.

* DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR...
  LAKESIDE                     BY 1030 PM MDT
  ELLSWORTH                    BY 1055 PM MDT

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 22, 2:15 PM MDT, 8 hours 7 minutes earlier.

Area forecast discussion, Jun 22, 2:15 PM MDT, 8 hours 7 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
315 PM CDT MON JUN 22 1998

FORECAST PROBLEMS ARE POTENTIAL FOR HEAVY RAIN AND FLASH FLOODING

THE 18Z SURFACE ANALYSIS SHOWS HIGH PRESSURE OVER NORTHEAST NEBRASKA
WITH FRONTAL BOUNDARY DIFFICULT TO FIND OVER NORTHEAST COLORAD. WINDS
WERE SOUTHEAST AT 5 TO 10 MPH ACROSS WESTERN NEBRASKA. VISIBLE
SATELLITE INDICATES CONVECTION FIRING OVER SOUTHEAST WYOMING AND THE
FRONT RANGE OF NORTHERN COLORADO AND ALSO NEAR BFF. WATER VAPOR IMAGERY
INDICATED A SHORTWAVE OVER WESTERN COLORADO MOVING NORTHEAST.

THE ETA MODEL IS PREFERRED WITH THIS PACKAGE DUE TO THE NGM NORTHERN
BIAS OF SURFACE LOW BY 36 HOURS. FURTHERMORE...THE NGM DRIES THE AREA
OUT TOO QUICKLY AFTER 12Z TUESDAY. ALL THE PARAMETERS ARE IN PLACE FOR
SEVERE WEATHER EVENT TONIGHT ACROSS THE FA PER 940. THE THETA-E RIDGE
IS ACROSS THE SOUTHWEST AND THE NEBRASKA PANHANDLE. CAPE VALUES ARE
PROGGED BY ETA FROM 1000 TO 2000 J/KG. LIFTED INDICES ARE PROGGED AT
-5. HELICITY VALUES RANGE FROM 200 TO 500 M2/S2. UPPER DIVERGENCE PROG
SHOWING BULLS EYE OVER WESTERN NEBRASKA TONIGHT AS SHORTWAVE MOVES
THROUGH WITH Q-G FORCING INDICATED. ETA QPF SHOWING BULLS EYE OF PRECIP
BY 12Z OVER WEST CENTRAL NEBRASKA. FFG VALUES ARE UNDER 2 INCHES OVER
THE ANW-ONL GROUP SO THAT AREA WILL NEED TO BE MONITORED FOR FLASH
FLOODING. SHOWERS AND STORMS WILL LINGER OVER ANW-ONL TUESDAY MORNING
WITH REDEVELOPMENT IN THE AFTERNOON WITH WHAT ANOTHER CHANCE FOR SEVERE
TUESDAY NIGHT IN THE NORTHEAST WITH LIFTED INDICES AROUND -8 AND CAPE
FROM 1000 TO 2000 J/KG. UPPER DIVERGENCE IS ALSO OVER THE NORTHEAST FOR
TUESDAY NIGHT AS THETA-E RIDGE SHIFTS INTO EASTERN NEBRASKA. SOUTHWEST
SHOULD BE CAPPED WITH 700 TEMPERATURES APPROACHING 12 DEGREES. ON
WEDNESDAY...SURFACE LOW MOVES INTO NORTHEAST NEBRASKA WITH TROUGH
EXTENDING SOUTHWEST TO MCK. THUNDERSTORMS CHANCES SHOULD DECREASE
CONSIDERABLY AS THIS LOW SHIFTS NORTHEAST OUT OF THE FA.

FOR TEMPERATURES FOLLOWED NGM GUIDANCE AND WENT WITH A BLEND OF NGM/FAN
GUIDANCE FOR HIGHS WEDNESDAY.

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

CCF
LBF BU 060/087 060/089 063 631
OGA BU 059/087 058/088 061 631
IML BU 063/088 061/090 062 631
VTN BB 061/087 059/086 061 644
ONL BB 063/086 063/087 064 546
ANW BB 062/087 062/086 063 546
BBW BB 061/086 061/087 063 545

FS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 11:03 PM MDTSevere Thunderstorm WarningLBFCherry, Grant47 min
Jun 23, 12:09 AM MDTSevere Thunderstorm WarningLBFFrontier, Hayes66 min
Jun 23, 12:31 AM MDTFlash Flood WarningLBFHayes3 hr
Jun 23, 1:09 AM MDTFlash Flood WarningLBFHayes6 hr
Jun 23, 1:24 AM MDTSevere Thunderstorm WarningLBFCuster66 min
Jun 23, 1:51 AM MDTFlash Flood WarningLBFLincoln6 hr

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.