Alert archive / Nebraska / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 226, NWS North Platte, NE

July 27, 2000Garden County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 27, 2000, 6:46 PM MDT for Garden County, Nebraska. It was in force for 59 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Jul 27, 2000, 6:46 PM MDT (00:46 UTC)
Expired: Jul 27, 2000, 7:45 PM MDT
In force: 59 min
Issued by: NWS North Platte, NE
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Garden County, NE

The radar

The North Platte radar (KLNX), 158 km from the middle of the area, began a volume at 00:47 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 27, 7:44 PM MDT	Hail 0.75	Lisco, NE	Thunderstorm winds estimated at 65 mph downed tree limbs.

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.

Issued	Product	Office	Lasted
Jul 27, 5:00 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.8 hours before the alert went out and 158 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: 3838 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1184 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 12.8

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLBF 280057 COR
SVRLBF
NEC069-280145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED UGC CODING FOR GARDEN COUNTY
NATIONAL WEATHER SERVICE NORTH PLATTE NE
646 PM MDT THU JUL 27 2000

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GARDEN COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 745 PM MDT

* AT 647 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 11 MILES WEST OF CRESCENT LAKE NWR...OR
  ABOUT 25 MILES SOUTHEAST OF ALLIANCE...MOVING NORTH AT 15 MPH.
  

* THE SEVERE THUNDERSTORM WILL BE...
  OVER FARM AND RANGELANDS OF GARDEN COUNTY
  ADDITIONAL SEVERE THUNDERSTORMS WILL ENTER SOUTHERN GARDEN         
  COUNTY BY 715 PM MDT. THE STORMS WILL BE NEAR LISCO AT 715 PM MDT
  AND NEAR OSHKOSH AT 745 PM MDT.

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER IN A SMALL
INTERIOR ROOM AWAY FROM WINDOWS. A BASEMENT OFFERS THE BEST
PROTECTION.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT
THURSDAY EVENING FOR WESTERN NEBRASKA.

LAT...LON 4126 10257 4125 10210 4196 10213 4200 10265

$$
DJB

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 27, 12:10 PM MDT, 6 hours 36 minutes earlier.

Area forecast discussion, Jul 27, 12:10 PM MDT, 6 hours 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
110 PM CDT THU JUL 27 2000

...FORECAST PROBLEM WILL BE FIRST PERIOD TSRA CHANCES...

6.7U STLT SHOWS MONSOON MSTR CIRCULATION CENTER LIFTING NORTH FROM
WRN NM. CONVECTION REFIRING IN C/NC KS. SOME WEAK CONVECTION NOW
MOVING FROM NE WY INTO SW SD AND EXTREME NW NEBR. A PERSISTENT BOUNDARY
FROM EARLIER CONVECTION IS APPARENT ON REGIONAL RADAR MOSAIC
EXTENDING FROM NEAR IEN SD SOUTHEAST INTO NW CUSTER COUNTY. SBCAPES
THIS AFTERNOON TO 3.5KJ/KG...SOME CAP HOWEVER SHOULD INHIBIT MOST
ACTIVITY UNTIL LATE THIS AFTTERNOON.

ETA MODEL DIFFERS FROM PREVIOUS ON TIMING. 12Z RUN SHOWS A DISTINCT
VORT MAX RUNNING THE RIDGE OVER NRN WY TODAY THEN DROPPING SSE
ACROSS CNTRL NEBR OVERNIGHT. THIS WILL LIKELY CREATE ANOTHER MCS
THROUGH WRN AND CNTRAL NEBR. VORT MAX CURRENTLY OVER WRN NEBR SHOULD
IN ADDITION FIRE UP AN MCS IN SRN NEBR AND MOVING S INTO KS THIS
EVENING. WILL ASSUME THIS SCENARIO BUT MONITOR AREAS OF POSSIBLE
CONV DEVELOPMENT AT ZONE ISSUANCE.

TONIGHT...WILL INCLUDE 50 POPS TONIGHT FOR ALL CWA. PLENTY OF AVBL
MSTR WITH PWS TO 1.5 IN. LARGE AREA OF 300-200 DIV AND LAYERED OMEGA
TRAVERSE THE CWA.  KEYING IN ON HEAVY RAIN POSSIBLE FROM CHERRY
COUNTY SE INTO FRONTIER AND CUSTER COUNTY AS STORM MOTION S/SE LESS
THAN 10 KTS.

FRIDAY...MCS WILL MOVE SOUTH OF AREA EARLY WITH SUBSIDENCE PREVALENT
BEHIND THE MCS INTO KS. MOSTLY CLOUDY AM IN THE SOUTH...PARTLY SUNNY
NORTH. WITH LIGHT EASTERLY WINDS HIGHS WILL BE HELD TO THE MID 80S.
A WEAK WAVE DROP SOUTH FROM CNTRAL SD WITH A SMALL CHC OF LATE DAY
TSRA IN THE NE ZONES CONTINUING INTO THE EVENING...OTHERWISE DRY.

FRIDAY NIGHT AND SATURDAY...PARTLY CLOUDY AND DRY. CONVECTION TO BE
CONFINED TO THE FOOTHILL AND NE WYOMING SAT AFTERNOON. LOWS FRIDAY
NIGHT AROUND 60...HIGHS SATURDAY IN THE 80S AS LIGHT EASTERLY WINDS
CONTINUE.

EFP...SUNDAY THRU TUES LOOKS DRY AS UPPER RIDGE BUILDS NW INTO THE
NRN PLAINS. ANY CONVECTION SHOULD BE CONFINED TO NEAR TO FOOTHILLS
AND QUICKLY DIE WITH ANY EASTWARD MOVEMENT. HIGHS 87-93 AND LOWS
57-63.

.LBF...NONE

ROBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 7:02 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	58 min
Jul 27, 7:56 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	64 min
Jul 27, 8:48 PM MDT	Severe Thunderstorm Warning	LBF	Hooker, McPherson	57 min
Jul 27, 9:06 PM MDT	Severe Thunderstorm Warning	LBF	Keith	54 min
Jul 27, 9:10 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	65 min
Jul 27, 11:06 PM MDT	Severe Thunderstorm Warning	LBF	Custer	54 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2000 Every severe thunderstorm warning in 2000

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.