Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 64, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at May 21, 1998, 1:19 PM MDT for Arthur County, Nebraska. It was in force for 66 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 21, 1998, 1:19 PM MDT (19:19 UTC)
- Expired
- May 21, 1998, 2:25 PM MDT
- In force
- 66 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Arthur County, NE
The radar
The North Platte radar (KLNX), 102 km from the middle of the area, began a volume at 19:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 21, 2:10 PM MDT | Hail 0.75 | Arthur, NE |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 7.3 hours before the alert went out and 104 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
- 379 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 211916 RRA SVRLBF NEC005-212025- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 219 PM CDT (119 PM MDT) THU MAY 21 1998 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ARTHUR COUNTY IN WEST CENTRAL NEBRASKA * UNTIL 225 PM MDT (325 PM CDT) * AT 118 PM MDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 27 MILES NORTH OF OGALLALA OR 6 MILES WEST SOUTHWEST OF ARTHUR MOVING EAST AT 10 MPH. * DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... ARTHUR BY 140 PM MDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO 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 21, 1:15 PM MDT, 4 minutes earlier.
Area forecast discussion, May 21, 1:15 PM MDT, 4 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 215 PM CDT THU MAY 21 1998 CHANCES FOR SVR TSRA AND THEN TEMPS ARE STILL THE MAIN CONCERNS... WILL AGAIN KEEP THIS SHORT WITH ANTICIPATION OF CONVECTION IN THE CWA. SFC MAP AT 18Z SHOWING FRONT INTO NC KS INTO XTREME NERN CO AND THEN NWD INTO ERN WY. ADAP SMC SHOWING BEST MOISTURE CONVERGENCE IN THE TRI-STATE AREA OF NEB/WY/SD AND INTO NW KS. DRAMATIC TEMPERATURE GRADIENT ACROSS THE BOUNDARY WITH NEAR 90 DEGREES AT GLD TO 68 AT IML. MODELS ARE SOMEWHAT VARIED IN THEIR SOLUTIONS...WITH NGM BEING THE QUICKEST AT MOVING THE UPPER LONG WAVE TROF INTO THE ROCKIES...THE ETA THE SLOWEST. BASED ON PREVIOUS OCCASIONS...LIKE THE SLOWEST SOLUTION (ETA). ETA ALSO HANDLES NEXT WAVE TO MOVE INTO THE NERN CO AREA BY THIS EVENING BETTER BASED ON WATER VAPOR IMAGERY. THIS ALL POINTS TO POSSIBLE MCS DEVELOPMENT AGAIN TONIGHT SOMEWHERE FROM THE SRN PANHANDLE INTO SW NEBR. BIG QUESTION IS WHETHER RAIN COOLED AIRMASS IN THE SWRN PART OF THE STATE WILL INHIBIT OR REDUCE CONVECTION. LOOKING AT WATER VAPOR IMAGERY AND COLD AIR ADVCETION ALOFT FURTHER SW...EXPECT THAT CONVECTION SHOULD GET GOING WITHOUT TOO MUCH PROBLEM. WILL LIKELY GO WITH CATEGORICAL PRECIP WORDING. FOR TOMORROW...BOUNDARY BECOMES A LITTLE MORE DIFFUSE ON THE NWRN SIDE AS NEW STRONGER LOW SETS UP IN NERN CO. WITH SUBSEQUENT WAVES COMING OUT OF MAIN UPPER LOW...TSRA CHANCES TO CONTINUE. WILL GO WITH LOWER DIURNAL RANGE OF TEMPS BASED ON CLOUD COVER AND WITH NEBR ON NERN SIDE OF FRONT...DONT SSE THE NGM SOLUTION OF DRYING LOW LEVELS OUT BY 30-36 HRS. PRELIMINARY GUIDANCE FOR COORDINATION ONLY. OFFICIAL FORECASTS ARE CONTAINED WITHIN PRODUCT OMAZFPNE... CCF LBF EE 058/070 054/067 050 +36 OGA EE 058/071 056/069 052 +36 ONL EE 061/070 057/067 054 +46 VTN EE 056/068 051/063 050 +35 STOPPKOTTE
In the hours before
Local storm report, May 21, 9:57 AM MDT, 3 hours 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1057 AM CDT THU MAY 21 1998
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0730 AM 16 NW HAYES CENTER NE 1.00 INCH HAIL
05/21/98 HAYES
M. MUTCHLERLocal storm report, May 21, 9:57 AM MDT, 3 hours 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1057 AM CDT THU MAY 21 1998
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0730 AM 16 NW HAYES CENTER NE 1.00 INCH HAIL
05/21/98 HAYES
M. MUTCHLERLocal storm report, May 21, 10:10 AM MDT, 3 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1110 AM CDT THU MAY 21 1998
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1000 PM 10 NE CHAPPELL NE 0.75 INCH HAIL
05/20/99 DEUEL
0540 AM 2 E VENANGO NE WIND DAMAGE
05/21/98 PERKINS LARGE TREE LIMBS DOWN
BOWMANLocal storm report, May 21, 10:10 AM MDT, 3 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1110 AM CDT THU MAY 21 1998
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1000 PM 10 NE CHAPPELL NE 0.75 INCH HAIL
05/20/99 DEUEL
0540 AM 2 E VENANGO NE WIND DAMAGE
05/21/98 PERKINS LARGE TREE LIMBS DOWN
BOWMANSpecial weather statement, May 21, 10:11 AM MDT, 3 hours 8 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-221200- SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA NATIONAL WEATHER SERVICE NORTH PLATTE NE 1110 AM CDT (1010 AM MDT) THU MAY 21 1998 THIS OUTLOOK PERTAINS TO THE FOLLOWING NEBRASKA COUNTIES... ARTHUR BLAINE BOYD BROWN CHASE CHERRY CUSTER DEUEL FRONTIER GARDEN GARFIELD GRANT HAYES HOLT HOOKER KEITH KEYA PAHA LINCOLN LOGAN LOUP MCPHERSON PERKINS ROCK SHERIDAN THOMAS WHEELER ...STORM SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON AND TONIGHT ACROSS MOST OF WESTERN AND NORTH CENTRAL NEBRASKA... THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON AND TONIGHT SOUTH AND WEST OF A LINE FROM RUSHVILLE TO BROKEN BOW. A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS ACROSS THE REMAINDER OF THE OUTLOOK AREA. A STATIONARY FRONT WILL REMAIN ALONG THE KANSAS AND NEBRASKA BORDER THROUGH TONIGHT. ALONG AND NORTH OF THIS FRONT...MOISTURE WILL BE PLENTIFUL IN THE LOW LEVELS AND WITH ADEQUATE AFTERNOON HEATING EXPECTED...CONDITIONS WILL BECOME FAVORABLE FOR THE DEVELOPMENT OF THUNDERSTORMS BY LATE AFTERNOON WEST OF A LINE FROM RUSHVILLE TO HAYES CENTER. AS AN UPPER LEVEL DISTURBANCE MOVES OVER THE AREA THIS EVENING...ANY THUNDERSTORMS THAT DEVELOP WILL HAVE THE POTENTIAL TO BECOME SEVERE RAPIDLY...ESPECIALLY IN THE MODERATE RISK AREA. THE MAIN SEVERE WEATHER THREAT WILL BE LARGE HAIL AND DAMAGING WINDS...HOWEVER WIND PROFILES THROUGH THE ATMOSPHERE WILL BECOME CONDUCIVE FOR DEVELOPING THUNDERSTORMS CAPABLE OF PRODUCING TORNADOES BY LATE AFTERNOON AND EVENING IN THE MODERATE RISK AREA. PERSONS PLANNING ANY OUTDOOR ACTIVITIES THIS AFTERNOON ADN TONIGHT SHOULD MONITOR NOAA WEATHER RADIO AND LOCAL MEDIA OUTLETS FOR FURTHER INFORMATION THROUGHOUT THE DAY. STOPPKOTTE
Local storm report, May 21, 10:16 AM MDT, 3 hours 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1116 AM CDT THU MAY 21 1998
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1000 PM 12 S OSHKOSH NE 0.75 INCH HAIL
05/20/99 GARDEN HAIL DRIFTED AGAINST
BUILDINGS
SPRINGERThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 8:11 PM MDT | Tornado Warning | LBF | Deuel, Garden | 64 min |
| May 20, 9:14 PM MDT | Severe Thunderstorm Warning | LBF | Garden | 61 min |
| May 20, 9:28 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 62 min |
| May 20, 9:52 PM MDT | Severe Thunderstorm Warning | LBF | Deuel | 63 min |
| May 21, 4:26 AM MDT | Severe Thunderstorm Warning | LBF | Chase | 64 min |
| May 21, 4:33 AM MDT | Severe Thunderstorm Warning | LBF | Perkins | 62 min |
| May 21, 5:36 AM MDT | Severe Thunderstorm Warning | LBF | Perkins | 64 min |
| May 21, 6:15 AM MDT | Severe Thunderstorm Warning | LBF | Hayes | 50 min |
| May 21, 6:29 AM MDT | Severe Thunderstorm Warning | LBF | Keith | 46 min |
| May 21, 6:36 AM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 64 min |
| May 21, 6:40 AM MDT | Severe Thunderstorm Warning | LBF | Perkins | 50 min |
| May 21, 6:44 AM MDT | Severe Thunderstorm Warning | LBF | Frontier | 66 min |
| May 21, 7:27 AM MDT | Severe Thunderstorm Warning | LBF | Frontier | 63 min |
| May 21, 7:38 AM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 62 min |
| May 21, 8:28 AM MDT | Severe Thunderstorm Warning | LBF | Frontier | 32 min |
| May 21, 1:33 PM MDT | Severe Thunderstorm Warning | LBF | Grant, Hooker | 62 min |
| May 21, 2:09 PM MDT | Severe Thunderstorm Warning | LBF | McPherson | 66 min |
| May 21, 2:57 PM MDT | Severe Thunderstorm Warning | LBF | Hooker, McPherson, Thomas | 63 min |
| May 21, 3:03 PM MDT | Severe Thunderstorm Warning | LBF | Keith, Lincoln | 62 min |
| May 21, 5:38 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 62 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.