Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 199, NWS North Platte, NE

July 14, 1998Lincoln County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 14, 1998, 8:39 PM CDT for Lincoln 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: Jul 14, 1998, 8:39 PM CDT (01:39 UTC)
Expired: Jul 14, 1998, 9:45 PM CDT
In force: 66 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Lincoln County, NE

The radar

The North Platte radar (KLNX), 102 km from the middle of the area, began a volume at 01:42 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 14, 9:00 PM CDT	Hail 0.75	North Platte, 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 00:00Z, 1.7 hours before the alert went out and 15 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.

567 
WUUS1 KLBF 150142
SVRLBF
NEC111-150245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE NORTH PLATTE NE
839 PM CDT TUE JUL 14 1998

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN AND EASTERN LINCOLN COUNTY IN SOUTHWESTERN NEBRASKA

* UNTIL 945 PM CDT

* AT 843 PM CDT... NORTH PLATTE DOPPLER RADAR INDICATED A LINE
  OF SEVERE THUNDERSTORMS FROM 5 MILES NORTHEAST OF NORTH PLATTE TO
  30 MILES SOUTHWEST OF NORTH PLATTE MOVING EAST AT 30 MPH.


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

THIS WARNING REPLACES THE ONE ISSUED PREVIOUSLY FOR SOUTH CENTRAL AND
SOUTHWEST LINCOLN COUNTY.

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 Jul 14, 2:25 PM CDT, 6 hours 14 minutes earlier.

Area forecast discussion, Jul 14, 2:25 PM CDT, 6 hours 14 minutes before

AREA FORECAST DISCUSSION...
NATIONAL WEATHER SERVICE NORTH PLATTE NE
225 PM CDT TUE JUL 14 1998

...CHANCE OF TSRA TONIGHT MAIN FORECAST CHALLENGE...

AT 18Z SURFACE COOL FRONT ADVANCING THROUGH CENTRAL ND AND NORTHWEST SD
WHILE TROF/DRY LINE EXTENDS FROM LOW OVER CENTRAL SD TO NEAR
VTN...TO JUST WEST OF OGA INTO ERN CO.  MOIST AND VERY UNSTABLE AIR IN
PLACE EAST OF TROF ALTHO DRIER AIR MIXING DOWN AHEAD OF TROF.  VSBL SATL
INDICATES CU/AC DEVELOPED ALONG TROF BRIEFLY BEFORE DISSAPATING AS
CONVECTION BEGINNING OVER SOUTHEAST WY...NORTHERN CO AND SOUTHERN NE
PANHANDLE. SWOMCD HIGHLIGHTS CURRENT CONDITIONS AND MAY REQUIRE LAST
MINUTE CHANGES.

ETA HAS PERFORMED BEST PAST SEVERAL RUNS AND AGAIN IS THE MODEL OF
CHOICE FOR THIS PACKAGE.  06Z POSITION OF FRONT WOULD BE FROM AROUND
ANW TO WEST OF OGA AND BY 12Z FROM ABOUT ONL TO LBF AND SHOULD SERVE AS
FOCUS FOR WHAT TSRA THAT DOES DEVELOP.  DYNAMICS REMAIN BEST TO THE
NORTH OF CWFA BUT AGREE WITH SPC IDEA OF STORMS DEVELOPING BACK INTO
ANW/ONL GROUP DURING NIGHT AND THIS IS SUPPORTED BY SOME Q-VECTOR
FORCING AND LAYER VVELS.  CAPE VALUES OF 3000 OR BETTER ARE ALSO
PRESENT FOR A TIME.  SUFFICIENT MOISTURE REMAINS A PROBLEM OVER MOST OF
CWFA ALTHO A LITTLE BETTER IN THE NORTH CENTRAL...AND VERY WARM 7H TEMPS
SHOULD CAP JUST ABOUT EVERYTHING EXCEPT IN THE SAME AREA. DEVELOPING
CONVECTION OVER HIGH PLAINS CALLS FOR A SMALL POP IN THE PANHANDLE
COUNTIES TNGT.  FWC/FAN NUMBERS SIMILAR TNGT AND FOLLOWED.

NEXT PROBLEM BECOMES THE AMOUNT OF COOLING TO BELIEVE THROUGH THE REST
OF THE FORECAST PERIOD.  MODELS DROP THCKNS VALUES CLOSE TO 100 METERS
WITH ETA THE WARMEST OF THE BUNCH AND WILL BUMP BOTH THE FWC/FAN
NUMBERS A POINT OR TWO IN THE LATER PERIODS.  LITTLE IN THE WAY OF
DYNAMICS ACROSS THE CWFA AFTER TONIGHT ALTHO THETA-E AXIS DEVELOPS OVER
THE WESTERN PART OF THE FORECAST AREA WITH TIME AS MID LEVEL SHORT WAVE
REMAINS NEARLY STATIONARY OVER ERN WY. HAVE ISOLATED GOING IN THE
PANHANDLE COUNTIES FRI/FRI NGT AND SEE NO REASON TO CHANGE THAT WITH THE
REST OF THE CWFA DRY.

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

CCF
LBF UU 068/091 065/089 066 10-0
OGA UU 069/090 066/089 067 10-0
ONL UU 070/092 065/088 065 31-0
VTN UU 066/091 063/088 651 21-0

BOWMAN

In the hours before

Local storm report, Jul 14, 8:18 PM CDT, 21 minutes before

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

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

0815 PM    WALLACE                   NE   0.75 INCH HAIL
07/14/98   LINCOLN

SLM

Local storm report, Jul 14, 8:18 PM CDT, 21 minutes before

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

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

0815 PM    WALLACE                   NE   0.75 INCH HAIL
07/14/98   LINCOLN

SLM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 8:01 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	64 min
Jul 14, 10:13 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	62 min
Jul 15, 3:18 AM CDT	Severe Thunderstorm Warning	LBF	Cherry	47 min
Jul 15, 4:07 AM CDT	Severe Thunderstorm Warning	LBF	Cherry, Hooker	48 min
Jul 15, 5:24 AM CDT	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.