Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 201, NWS North Platte, NE

July 15, 1998Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 15, 1998, 2:18 AM MDT for Cherry County, Nebraska. It was in force for 47 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: Jul 15, 1998, 2:18 AM MDT (08:18 UTC)
Expired: Jul 15, 1998, 3:05 AM MDT
In force: 47 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 08:19 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
Jul 15, 3:15 AM MDT	Hail 0.75	Merriman, NE	Extensive tree damage due to thunderstorm winds. Tree blown onto roof of house.

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 00:00Z, 8.3 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 633 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 3471 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

398 
WUUS1 KLBF 150812 RRA
SVRLBF
NEC031-150905-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
318 AM CDT (218 AM MDT) WED JUL 15 1998

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

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

* UNTIL 405 AM CDT

* AT 317 AM CDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 42 MILES NORTHWEST OF MULLEN OR 33 MILES SOUTH OF
  MERRIMAN MOVING SOUTH SOUTHEAST AT 10 MPH.

* THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

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

KB

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 Jul 15, 2:10 AM MDT, 8 minutes earlier.

Area forecast discussion, Jul 15, 2:10 AM MDT, 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
310 AM CDT WED JUL 15 1998

...COMPLICATED FORECAST WITH NUMEROUS BOUNDARIES AND ONGOING
CONVECTION...

06Z SFC ANALYSIS SHOWS FRONT LOCATED FROM ERN SD SWWD INTO CENTRAL
NEBRASKA..THEN W INTO THE SRN PANHANDLE. THE FRONT HAS MORE PUSHING IT
EWD THAN SWD AND MAY BE HUNG UP ALREADY IN WRN NEBR BASED ON SFC
ALTIMETER CHANGES. IR SAT PICS SHOWING MCS MOVING SWD QUICKLY NEAR
NEB/IA BORDER WITH ANOTHER TSRA COMPLEX IN SWRN SD AND NWRN PART OF
CWA. NUMEROUS BOUNDARIES SHOWING UP ON KLNX 88D AS WELL.

MODELS ARE IN FAIR AGREEMENT AS THEY CONTINUE TO BUILD UPPER RIDGE IN
THE SW...BUT AS USUAL DIFFER IN POSIITON OF SUBTLE SHORT WAVES MOVING
THRU THE UPPER FLOW. NGM IS ALSO MORE AGGRESSIVE WITH COOLING THRU 700
MB THRU 24 HRS...PROBABLY TOO MUCH BASED ON EVENING UPPER AIR ANALYSIS.
WILL GENERALLY BASED TIMING OF TSRA IN FCST BASED ON ETA SOLUTION...BUT
BELIEVE WITH ALL OF THE OUTFLOW BOUNDARIES AROUND...MESOSCALE
INFLUENCES MAY BE TOO MUCH FOR ANY MODEL TO PICK UP ON. ETA ALSO HOLDS
FRONT UP IN THE SRN PANHANDLE SIMILAR TO CURRENT OBS. BELIEVE THE FRONT
WILL PUSH SWD IN ERN NEBR BEHIND MESO HIGH THAT BUILDS SWD FROM IA MCS.
THIS SHOULD ALLOW SERLY FLOW TO SET UP IN WRN NEBR AS PER GRIDDED DATA
TONIGHT. ETA SHOWS NEAR SFC CONVERGENCE IN SWRN NEBR BY AFTERNOON AND
WITH WEAK WAVES MOVING SEWD ON ERN SIDE OF DEVELOPING RIDGE...WOULD
EXPECT TSRA COMPLEX TO DEVELOP SOMEWHERE IN THE WRN HIGH PLAINS BY
EVENING...AND ETA PICKS UP ON ANOTHER MOVING ALONG THE NEB/KS BORDER IN
SC NEBR BY AFTERNOON. CAP WOULD APPEAR TO BE MINIMAL
FACTOR...ESPECIALLY IF CONVECTION GETS GOING FURTHER W OF CWA. WILL PUT
POPS IN MOST AREAS BUT WILL HIT THE HARDEST CLOSER TO REMAINING FRONT.

FOR THURSDAY...NEXT LEE TROF/850 FRONT SHOULD MOVE INTO THE NWRN PART
OF THE CWA LATE...BUT WILL HOLD OFF ON POPS FOR NOW BASED ON PROGGED
LACK OF MOISTURE. WILL HAVE TO CUT THIS SHORT WITH CONVECTION IN NWRN
CWA INCREASING...

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

CCF
LBF BU 090/060 091/062 095 230
OGA BU 090/059 0901/063 096 +30
ONL BU 087/062 087/064 090 220
VTN BU 087/059 090/061 094 +30

STOPPKOTTE

In the hours before

Local storm report, Jul 14, 8:25 PM MDT, 5 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
925 PM CDT TUE JUL 14 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

090@0 PM    NORTH PLATTE              NE   0.75 INCH HAIL
07/14/98   LINCOLN

SLM

Local storm report, Jul 14, 8:25 PM MDT, 5 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
925 PM CDT TUE JUL 14 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

090@0 PM    NORTH PLATTE              NE   0.75 INCH HAIL
07/14/98   LINCOLN

SLM

Local storm report, Jul 14, 9:38 PM MDT, 4 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
1038 PM CDT TUE JUL 14 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1020 PM    40 SSW MERRIMAN           NE   0.75 INCH HAIL
07/14/98   CHERRY

SLM

Local storm report, Jul 14, 9:38 PM MDT, 4 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
1038 PM CDT TUE JUL 14 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1020 PM    40 SSW MERRIMAN           NE   0.75 INCH HAIL
07/14/98   CHERRY

SLM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 7:01 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	64 min
Jul 14, 7:39 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	66 min
Jul 14, 9:13 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	62 min
Jul 15, 3:07 AM MDT	Severe Thunderstorm Warning	LBF	Cherry, Hooker	48 min
Jul 15, 4:24 AM MDT	Severe Thunderstorm Warning	LBF	Lincoln, McPherson	51 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1998 Every 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.