Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 152, NWS North Platte, NE

July 2, 1999Chase County, Hayes County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 2, 1999, 6:06 PM MDT for Chase County, Hayes County, Nebraska. It was in force for 64 min. 2 reports 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 2, 1999, 6:06 PM MDT (00:06 UTC)
Expired
Jul 2, 1999, 7:10 PM MDT
In force
64 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Chase County, NE, Hayes County, NE

The radar

The Goodland radar (KGLD), 132 km from the middle of the area, began a volume at 00:09 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
Jul 2, 6:15 PM MDTHail 0.75Hamlet, NE
Jul 2, 6:50 PM MDTThunderstorm Wind 60Champion, NEThunderstorm wind blew down several 12 inch diameter trees and several sheds.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 2, 3:00 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.1 hours before the alert went out and 94 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, N. Platte/Lee Bi, NE at 00:00Z on 1999-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5849 joules per kilogram.LCLLFCEL10008507005003002001001 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, N. Platte/Lee Bi, NE at 00:00Z on 1999-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 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
5849 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
1210 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
3.4
Supercell composite
25.1

Open this sounding in Storm Lab

The text

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

403 
WUUS1 KLBF 030006 RRA
SVRLBF
NEC029-085-030110-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
706 PM CDT (606 PM MDT) FRI JUL 2 1999

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME SOUTHEASTERN CHASE COUNTY IN SOUTHWESTERN NEBRASKA
  WESTERN HAYES COUNTY IN SOUTHWESTERN NEBRASKA

* UNTIL 710 PM MDT (810 PM CDT)

* AT 604 PM MDT (704 PM CDT)... NORTH PLATTE DOPPLER RADAR
  INDICATED A SEVERE THUNDERSTORM 18 MILES SOUTHEAST OF IMPERIAL OR
  5 MILES WEST OF HAMLET... MOVING NORTHEAST AT 30 MPH.

* DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR...
  HAMLET                       BY 710 PM CDT
  HAYES CENTER                 BY 735 PM CDT
  WAUNETA                      BY 710 PM CDT

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

DLS

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 2, 1:45 PM MDT, 4 hours 21 minutes earlier.

Area forecast discussion, Jul 2, 1:45 PM MDT, 4 hours 21 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
245 PM CDT FRI JUL 2 1999

...FORECAST CHALLENGES ARE THUNDERSTORM CHANCES TONIGHT THEN
TEMPERATURES...

SURFACE WARM FRONT HAS LIFTED NORTH THROUGH MOST OF CWFA PUSHING
DEWPOINTS INTO LOWER TO MID 70S SE OF AXIS FROM VTN TO IML. WARM
FRONT EXTENDED SW TO LOW IN FAR SE WY. CI FROM CONVECTION OVER MTNS
HAS KEPT TEMPERATURES A BIT COOLER THAN EXPECTED SO FAR. VERY
UNSTABLE BUT CAPPED ATMOSPHERE IS OVER AREA FROM MCK TO VTN.
FORECAST PROBLEM IS WHERE CONVECTION WILL DEVELOP TONIGHT. NEAREST
UPSTREAM TSRA ACTIVITY AT 19Z WAS FROM CENTRAL CO TO SW KS
ASSOCIATED WITH WEAK SHORTWAVE MOVING OUT OF NEW MEXICO. WITHOUT
STRONG DYNAMICS...WILL LEAVE IN 20 PERCENT POPS FOR OVERNIGHT
THUNDERSTORMS ACROSS FORECAST AREA...EXCEPT IN THE NE. IN ONL TO ANW
GROUP THE PROXIMITY TO THE WARM FRONT AND UPSTREAM SURFACE DEWPOINTS
IN MID 70S WILL WARRANT KEEPING POPS A BIT HIGHER AT 30 PERCENT.
THIS AREA WILL ALSO NEED TO BE WATCHED FOR POTENTIAL HEAVY RAINFALL
AS FLASH FLOOD GUIDANCE VALUES THERE ARE LOW DUE TO RECENT RAINFALL.

ETA HAD BEST RUN TO RUN MODEL CONSISTENCY AND WAS BETTER THAN NGM
WITH SURFACE DEWPOINTS. IT ALSO HAD GOOD HANDLE ON VORT MAX AT 18Z
MOVING OUT OF SW AND THUS MODEL OF CHOICE. NOT A LOT OF DIFFERENCE
BETWEEN MODELS IN HANDLING OF MAJOR FEATURES.

WENT CLOSER TO WARMER FAN TEMPERATURES FOR HIGHS SAT AND SUNDAY WITH
OVERNIGHT LOWS CLOSE TO GUIDANCE. EXPECT CAP TO REMAIN STRONG ENOUGH
TO LEAVE OUT MENTION OF TSRA SATURDAY AND WILL KEEP FORECAST DRY AND
HOT WITH BREEZY CONDITIONS MENTIONED IN MOST ZONES. HOT AND DRY
TREND WILL PERSIST SUNDAY WITH SURFACE TROUGH HANGING TOUGH OVER
WESTERN NE. IN EXTENDED...93P GUIDANCE NOW HAS HIGHS ONLY IN LOWER 80S
FOR MONDAY WITH MRF SHOWING DRY COLD FRONT TO PUSH INTO FORECAST
AREA AND WILL CUT HIGHS BACK SOME FOR MONDAY AND ADD CHANCE OF
THUNDERSTORMS FOR WEDNESDAY WITH SHORTWAVE MOVING OVER RIDGE THROUGH
AREA.

.LBF...NONE.
SHEETS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 6:28 PM MDTSevere Thunderstorm WarningLBFChase62 min
Jul 2, 6:46 PM MDTSevere Thunderstorm WarningLBFPerkins59 min
Jul 2, 7:00 PM MDTTornado WarningLBFPerkins50 min
Jul 2, 7:09 PM MDTSevere Thunderstorm WarningLBFLincoln61 min
Jul 2, 7:43 PM MDTTornado WarningLBFKeith, Lincoln, McPherson47 min
Jul 2, 8:15 PM MDTSevere Thunderstorm WarningLBFCuster, Lincoln, Logan60 min
Jul 2, 8:15 PM MDTSevere Thunderstorm WarningLBFThomas60 min
Jul 2, 8:29 PM MDTSevere Thunderstorm WarningLBFHooker, McPherson61 min
Jul 2, 8:43 PM MDTSevere Thunderstorm WarningLBFSheridan62 min
Jul 2, 9:10 PM MDTTornado WarningLBFSheridan45 min
Jul 2, 9:20 PM MDTSevere Thunderstorm WarningLBFCherry60 min
Jul 2, 9:33 PM MDTSevere Thunderstorm WarningLBFCherry62 min
Jul 2, 9:56 PM MDTTornado WarningLBFCherry64 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.