Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 69, NWS North Platte, NE

June 3, 1999Sheridan County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 3, 1999, 7:17 PM MDT for Sheridan County, Nebraska. It was in force for 33 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
Jun 3, 1999, 7:17 PM MDT (01:17 UTC)
Expired
Jun 3, 1999, 7:50 PM MDT
In force
33 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 01:17 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

TimeReportWhereRemark
Jun 3, 7:25 PM MDTHail 1Ellsworth, 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

Rapid City, SD (KUNR), launched 00:00Z, 1.3 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 1999-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1999-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3720 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 040116 RRA
SVRLBF
NEC161-040150-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
817 PM CDT (717 PM MDT) THU JUN 3 1999

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

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

* UNTIL 750 PM MDT (850 PM CDT)

* AT 716 PM MDT... NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 43 MILES EAST OF ALLIANCE OR 21 MILES EAST OF SMITH
  LAKE... MOVING EAST AT 15 MPH.

THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. GO INSIDE A STURDY BUILDING AND
STAY AWAY FROM WINDOWS!

KAR

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 3, 1:14 PM MDT, 6 hours 3 minutes earlier.

Area forecast discussion, Jun 3, 1:14 PM MDT, 6 hours 3 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
214 PM CDT THU JUN 3 1999

...FORECAST CHALLENGE...WHERE CONVECTION MAY FIRE...

...SYNOPSIS...
    SATELLITE 11-3.9 INDICATED SMALL CIRCULATION THIS AM OVER EAST
CENTRAL CO...ASSOCIATED WITH STRATUS FROM SOUTHWEST NEB TO EASTERN CO
AND WESTERN KS WHICH HAS SINCE DISSIPATED/SHIFTED EAST. LOW OVER
SOUTHWEST CONUS CONTINUES TO SEND BITS OF ENERGY NORTHEAST INTO AREA
THROUGH PERIOD. CU DEVELOPING AS WE SPEAK IN GARDEN COUNTY (EASTERN
PANHANDLE REGION.) WV IMAGERY SHOWS S/W ROUNDING THE BASE OF THE TROF
LOOKING TO SET OFF CONVECTION TNT.

...MODEL PERFORMANCE...
ETA DID WELL YESTERDAY SHOWING 700 MB SHORTWAVE COUPLED WITH UPPER
LEVEL DIVERGENCE THAT KICKED OFF LAST NIGHT'S ROUND OF CONVECTION...SO
WILL RUN WITH IT TODAY AGAIN.

...TONIGHT...
MOST LIKELY AREA IN OUR CWA FOR ANY SVR STORMS LOOKS TO BE NORTH CENTRAL
NEB. LEFT OVER BOUNDARIES FROM THIS MORNING'S SHOWERS LINGER BETWEEN
ANW AND VTN. LOW LEVEL JET LOOKING GOOD...WITH 50+KTS OVER NORTH
CENTRAL NEB DURING DAY TODAY BRINGING IN MOISTURE. MESOETA SHOWING
CONVECTION INITIATION BETWEEN 04/00Z AND 03Z OVER THE VTN-ANW AREA WITH
ENERGY MOVING INTO NORTH CENTRAL NEB AT THAT TIME. PLENTY OF SUPPORTING
PARAMETERS BY 4/03Z FOR ANW-ONL AREA (MESOETA DERIVED SOUNDING) AND
EASTWARD. CAPES IN THE 2000 RANGE, LI'S OF -6, CAP ONLY 55-80 J/KG,
0-3KM SR HELICITY 282. ETA UPPER LEVEL DIVERGENCE BULLSEYED IN THE
VICINITY OF OLU AREA BY 06Z INDICATES CONVECTION MAY START IN NORTH
CENTRAL AND MOVE EAST. IF YOU THINK TONIGHT LOOKS GOOD, WAIT UNTIL
FRIDAY AFTERNOON/EVENING FOR THAT SAME AREA! WILL STICK WITH 50 POPS
FOR TNT IN N CENTRAL. WAITING TO SEE IF I WILL NEED TO PUT IN SCT TSRA
IN LBF ZONES AS THINGS DEVELOP ALONG DRY LINE THIS AFT.

THINGS LOOK LIKE THEY WILL SETTLE DOWN OVERNIGHT DURING EARLY MORNING
HOURS AS MCS MOVES EAST OUT OF OUR CWA.

...FRIDAY/NIGHT...
VERY UNSTABLE AIR SETS THE STAGE FOR MORE CHANCES OF CONVECTION IN
CENTRAL AND NORTH CENTRAL NEB. THETA-E RIDGE TREMENDOUS 00Z SAT OVER
HOLT COUNTY WITH CAPES 5600+. UNFORTUNATELY WE LOSE UPPER LEVEL SUPPORT
OVER EASTERN PART OF THE STATE...AND A PIECE OF ENERGY ENTERS PANHANDLE
INSTEAD. PERHAPS LEFTOVER BOUNDARIES FROM ANYTHING THAT MIGHT FIRE
TONIGHT COULD HELP GET THINGS GOING FRIDAY IN NORTH CENTRAL AS IT WON'T
TAKE MUCH. 7H HAS A LITTLE BIT OF ENERGY ENTERING THAT AREA. WILL LEAVE
POPS IN...PERHAPS BOOST A NOTCH. REST OF FA...A LITTLE SUBSIDENCE (NEG
OMEGA AT H7 BY 18Z OVER SW.) ALSO GOING TO GO BREEZY DURING THE DAY FOR
NORTH CENTRAL ZONES...10-20 MPH ELSEWHERE.

...SAT...
QUITE A DIFFERENCE BETWEEN NGM AND AVN/MRF MODELS FOR SAT. NGM BRINGS
COOLER WX...WHILE AVN KEEPS COLD FRONT JUST TO THE WEST WITH SHORT WAVE
COMING IN. NGM APPEARS TO BE THE OUTLIER WITH PERSISTENT SW FLOW. WILL
PUT 20 OR 30 POPS IN FOR AFTERNOON ACROSS FA...POSSIBLY LINGERING INTO
SUNDAY MORNING. ETA PUTS MORNING STRATUS LEFT OVER FROM MCS (IF NOT SOME
FOG) IN VTN-ONL AREA.

...EXTENDED SUN/MON/TUE...
COLD FRONT/LEE SIDE TROF SETS UP BY 00Z SUNDAY PROGGED TO MOVE TO
WESTERN NEB SUNDAY AND LINGER THERE (MRF.) PROBABLY GO WITH A CHANCE OF
THUNDERSTORMS SUN AND TUE AS WE REMAIN IN SfOUTHWEST FLOW WITH A TROF
MOVING THROUGH AGAIN TUESDAY.  A LITTLE BIT OF RIDGING MONDAY MAY LET
US DRY OUT FOR A DAY.

.LBF...NONE

SLM

In the hours before

Local storm report, Jun 3, 5:06 PM MDT, 2 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
606 PM CDT THU JUN 3 1999

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

0550 PM    LAKESIDE                  NE   1.00 INCH HAIL
06/03/99   SHERIDAN

DJB
Local storm report, Jun 3, 5:06 PM MDT, 2 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
606 PM CDT THU JUN 3 1999

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

0550 PM    LAKESIDE                  NE   1.00 INCH HAIL
06/03/99   SHERIDAN

DJB
Local storm report, Jun 3, 5:58 PM MDT, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
658 PM CDT THU JUN 3 1999

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

0610 PM    1 W LAKESIDE              NE   1.75 INCH HAIL
06/03/99   SHERIDAN

DJB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 3, 6:26 PM MDTSevere Thunderstorm WarningLBFSheridan49 min
Jun 3, 6:43 PM MDTSevere Thunderstorm WarningLBFCherry47 min
Jun 3, 6:58 PM MDTTornado WarningLBFCherry47 min
Jun 3, 7:47 PM MDTTornado WarningLBFCherry48 min
Jun 3, 8:28 PM MDTSevere Thunderstorm WarningLBFCuster62 min
Jun 3, 8:37 PM MDTTornado WarningLBFCherry48 min
Jun 3, 8:58 PM MDTSevere Thunderstorm WarningLBFGarfield32 min
Jun 3, 9:27 PM MDTTornado WarningLBFCherry33 min
Jun 3, 9:31 PM MDTSevere Thunderstorm WarningLBFCuster49 min
Jun 3, 10:05 PM MDTTornado WarningLBFCherry30 min
Jun 3, 10:16 PM MDTSevere Thunderstorm WarningLBFWheeler49 min
Jun 3, 10:26 PM MDTTornado WarningLBFGarfield49 min
Jun 3, 10:37 PM MDTTornado WarningLBFCherry63 min
Jun 3, 10:38 PM MDTTornado WarningLBFWheeler47 min
Jun 3, 11:20 PM MDTTornado WarningLBFGarfield50 min
Jun 3, 11:30 PM MDTTornado WarningLBFWheeler45 min
Jun 3, 11:40 PM MDTTornado WarningLBFCherry65 min
Jun 4, 12:18 AM MDTSevere Thunderstorm WarningLBFWheeler47 min
Jun 4, 12:47 AM MDTTornado WarningLBFCherry63 min
Jun 4, 5:07 PM MDTSevere Thunderstorm WarningLBFPerkins63 min
Jun 4, 5:18 PM MDTSevere Thunderstorm WarningLBFKeith47 min
Jun 4, 5:50 PM MDTSevere Thunderstorm WarningLBFArthur, Garden, Keith65 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1999Every severe thunderstorm warning in 1999

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.