Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 93, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at May 30, 1998, 12:41 AM MDT for Sheridan County, Nebraska. It was in force for 49 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 30, 1998, 12:41 AM MDT (06:41 UTC)
- Expired
- May 30, 1998, 1:30 AM MDT
- In force
- 49 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Sheridan County, NE
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 29, 9:15 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 6.7 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.
- Mixed-layer CAPE
- 556 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 1826 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 13.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 300640 RRA SVRLBF NEC161-300730- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 141 AM CDT (1241 AM MDT) SAT MAY 30 1998 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME NORTHWESTERN SHERIDAN COUNTY IN THE NEBRASKA PANHANDLE * UNTIL 130 AM MDT (230 AM CDT) * AT 1240 AM MDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 14 MILES EAST NORTHEAST OF CHADRON OR 11 MILES WEST SOUTHWEST OF WHITE CLAY MOVING EAST AT 30 MPH. * DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... WHITE CLAY BY 100 AM MDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. xGO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! MTM
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 29, 2:08 PM MDT, 10 hours 33 minutes earlier.
Area forecast discussion, May 29, 2:08 PM MDT, 10 hours 33 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 308 PM CDT FRI MAY 29 1998 FORECAST PROBLEMS ARE POPS AND TEMPERATURES CURRENT KLNX RADAR DOES NOT INDICATE ANY THUNDERSTORM DEVELOPMENT. SATELLITE HINTS AT SOME POSSIBLE CONVECTION STARTING IN NORTHEAST COLORADO. THE 18Z SURFACE CHART SHOWS TWO BOUNDARIES...A COLD FRONT ACROSS THE NORTHERN NEBRASKA BORDER AND THE STATIONARY FRONT ACROSS CENTRAL NEBRASKA. THE MODELS INITIALIZED WELL WITH WATER VAPOR BUT THE ETA/AVN ARE IN BETTER AGREEMENT THAN THE NGM. THE NGM IS FASTER AND FURTHER NORTH WITH THE LOW WHICH IS ITS TYPICAL BIAS. THE RIDGE OVER THE PLAINS MOVES EAST OVER THE MISSOURI VALLEY BY 36 HOURS. AT THAT TIME SPLIT FLOW BEGINS TO AFFECT THE FA. THE COLD FRONT OVER THE NORTHERN NEBRASKA BORDER WILL BE THE FOCUS FOR THUNDERSTORMS TONIGHT ALONG WITH ANOTHER NEARLY STATIONARY BOUNDARY ACROSS CENTRAL NEBRASKA WHERE DEWPOINTS ARE IN THE UPPER 50S AND LOW 60S. ETA GRIDDED DATA INDICATES Q-G FORCING AND UPWARD VERTICAL VELOCITIES AS A SHORTWAVE MOVES OVER THE FA TONIGHT. THE THETA-E RIDGE IS ALSO OVER THE FA ALONG WITH CAPE RANGING FROM 2000-3000 J/KG. SOME FORCING EXISTS IN THE NORTHEAST DURING THE AFTERNOON ON SATURDAY BUT SHIFTS EAST OF THE FA BY EVENING. BY 12Z SUNDAY DYNAMICS SHIFT EVEN FURTHUR EAST AS THE LOW MOVES FROM NORTHEAST NEBRASKA INTO SOUTHERN IOWA. WILL FOLLOW THE FAN GUIDANCE FOR TEMPERATURES WITH COOLER AIR MOVING INTO THE FA BY SUNDAY. THICKNESSES DROP 120 METERS AND 850 TEMPERATURES FALL AROUND 7 DEGREES C WHICH IS MORE IN LINE WITH THE FAN. PRELIMINARY GUIDANCE FOR COORDINATION ONLY. OFFICIAL FORECASTS ARE CONTAINED WITHIN PRODUCT OMAZFPNE... CCF LBF UU 057/087 052/079 048 5-- OGA UU 055/086 050/078 049 5-- IML UU 058/089 053/081 050 5-- VTN UU 056/084 054/074 049 5-- ONL UU 060/086 056/078 050 53- ANW UU 059/085 055/076 049 53- BBW UU 060/087 054/079 049 52- FS
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 1:12 AM MDT | Severe Thunderstorm Warning | LBF | Cherry | 63 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.