Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 101, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jun 8, 1999, 8:10 PM CDT for Blaine County, Cherry County, Thomas County, Nebraska. It was in force for 55 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
- Jun 8, 1999, 8:10 PM CDT (01:10 UTC)
- Expired
- Jun 8, 1999, 9:05 PM CDT
- In force
- 55 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
Counties Blaine County, NE, Cherry County, NE, Thomas County, NE
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 8, 8:15 PM CDT | Hail 0.75 | Thedford, NE | |
| Jun 8, 8:30 PM CDT | Hail 0.75 | Elsmere, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 8, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.2 hours before the alert went out and 111 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.
- Mixed-layer CAPE
- 1181 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 3256 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLBF 090109 SVRLBF NEC009-017-031-171-090205- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 810 PM CDT (710 PM MDT) TUE JUN 8 1999 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BLAINE COUNTY IN NORTH CENTRAL NEBRASKA SOUTHERN BROWN COUNTY IN NORTH CENTRAL NEBRASKA SOUTHEASTERN CHERRY COUNTY IN NORTH CENTRAL NEBRASKA NORTHEASTERN THOMAS COUNTY IN NORTH CENTRAL NEBRASKA * UNTIL 905 PM CDT * AT 807 PM CDT... NORTH PLATTE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 25 MILES SOUTHWEST OF AINSWORTH TO 15 MILES NORTHEAST OF THEDFORD. THE LINE WAS MOVING EAST SOUTHEAST AT 25 MPH. * DAMAGING HAIL AND/OR DESTRUCTIVE WINDS CAN BE EXPECTED NEAR... PURDUM AND ELSMERE BY 815 PM CDT BREWSTER BY 850 PM CDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND SRTAY AWAY FROM WINDOWS! JRS
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 8, 2:45 PM CDT, 5 hours 25 minutes earlier.
Area forecast discussion, Jun 8, 2:45 PM CDT, 5 hours 25 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
245 PM CDT TUE JUN 8 1999
...FORECAST CHALLENGE...LOCATION, EXTENT, AND STRENGTH OF CONVECTION IN
ALL FORECAST PERIODS.
...SYNOPSIS...
SATELLITE WV/IR IMAGERY INDICATED A TROUGH AXIS IN THE WESTERN U.S.
WITH A VORT MAX COMING ABOUT THE BASE OF THE TROUGH TOWARD THE SOUTHERN
CALIFORNIA COAST. ADAP CHARTS INDICATED AN AXIS OF STRONG SURFACE
MOISTURE FLUX CONVERGENCE FROM ABOUT SUX THROUGH YKN TO NEAR PHP.
VISUAL SATELLITE INDICATED CUMULUS BUILDUPS IN NORTHEAST COLORADO
NORTHEAST OF STERLING APPARENTLY ALONG THE DRYLINE.
...MODEL PERFORMANCE...
AT 500MB...THERE IS NOT A LOT OF DIFFERENCE BETWEEN THE NGM AND AVN
SOLUTIONS THROUGH 48 HOURS. THE ETA IS SIMILAR TO THE NGM AND AVN
THROUGH 36 HOURS AT LEAST AS FAR AS NEBRASKA IS CONCERNED. ALL THREE
ARE VERY CLOSE WITH MSL FEATURES AND THE PERSISTENCE OF THE LOW ON THE
HIGH PLAINS. HAVE CHOSEN A BLEND OF THE AVN AND ETA BECAUSE OF THEIR
WIDER RANGE OF CONVECTIVE PARAMETERS PRODUCTS IN AWIPS.
...FIRST PERIOD...
POSITIVE ENERGY OF 3000-4000J/KG IN THE NORTHERN AND EASTERN PARTS
OF THE NORTH PLATTE FORECAST AREA AND 850MB BASED LI'S INDICATE A
VOLATILE SITUATION. CONVECTIVE INITIATION...HOWEVER...IS -20 TO -30
J/KG IN THE SOUTHWEST PART OF THE FORECAST AREA. STRONGEST FORCING FROM
LOW LEVEL CONVERGENCE WILL BE IN WESTERN SOUTH DAKOTA. SO...WOULD
EXPECT THE MOST LIKELY AREA OF CONVECTIVE SYSTEM DEVELOPMENT TO BE UP
THERE. IN WESTERN NEBRASKA...THE LOW AND MID LEVEL MOISTURE IS LACKING
WITH CONDENSATION DEFICITS OF 300MB AND 150MB RESPECTIVELY. THE CLUSTER
DEVELOPING IN COLORADO WILL PROBABLY BE A THREAT THIS EVENING IN THE
SOUTHWEST. I EXPECT THAT CONVECTION WILL BE ELEVATED WITH LITTLE
PRECIPITATION REACHING THE SURFACE.
...SECOND AND THIRD PERIOD...
THE BEST COMBINATION OF FORCING AND INSTABILITY WILL BE EAST OF A
VTN-LBF LINE WEDNESDAY EVENING AS INDICATED BY 700-500MB OMEGA...
Q-VECTOR CONVERGENCE AND LOW LEVEL CONVERGENCE. HOWEVER...WITH LOW
LEVEL CONDENSATION DEFICITS OF 150MB OR HIGHER SOUTH OF BBW AND LBF...
THE HIGHER PROBABILITY WILL BE IN THE ONL-ANW AREA. A LOOK AT THE 850MB
TEMPERATURE PROGS INDICATES HIGHS WEDNESDAY COOLER THAN TODAY'S BY
5-10F WITH THE GREATER CHANGE IN THE NORTHEAST PANHANDLE.
...FOURTH PERIOD...
TEMPERATURES SHOULD BE ANOTHER 15-25F COOLER ON THURSDAY AGAIN WITH
THE GREATER CHANGE IN THE PANHANDLE. THE 850MB CONVERGENCE COUPLED WITH
300MB DIVERGENCE WILL BE CONFINED TO THE SOUTHWEST. THE STRONGEST
INSTABILITY WILL BE IN THE SOUTHWEST AS WELL. IN ADDITION...LOW AND MID
LEVEL CONDENSATION DEFICITS ARE FORECAST TO BE LESS THAN 40MB OVER MOST
OF THE FORECAST AREA. IN THE REST OF THE FORECAST AREA...QG-FORCING AND
NEAR SATURATION IN THE LOW AND MID LEVELS SHOULD COMBINE TO PRODUCE
RAIN WITH POSSIBLE THUNDERSTORMS.
...EXTENDED PERIOD...
THE UPPER LEVEL SHORT WAVE TROUGHS CONTINUE COMING INTO WESTERN
NEBRASKA ON A 24 HOUR PERIOD WITH PREVAILING EAST TO SOUTHEAST FLOW IN
THE LOWER LEVELS. WITH PRIME TIME ARRIVAL OF EACH SYSTEM IT APPEARS
THAT A CHANCE OF THUNDERSTORMS SHOULD BE IN EACH PERIOD...WITH THE BEST
LOW-LEVEL CONVERGENCE AND COMPLIMENTARY DIVERGENCE THURSDAY NIGHT. SO
WILL HAVE A SEPARATE LISTING FOR THURSDAY NIGHT. THE MRF TEMPERATURE/
THICKNESS PROGS INDICATE SIGNIFICANTLY COOLER WEATHER FRIDAY THROUGH
SUNDAY THAN YESTERDAY AND TODAY WITH 850MB TEMPERATURE DECREASES OF
10-15C AND 1000-500MB THICKNESS DECREASES OF 90-120M. SO WILL GO WITH
HIGHS IN THE 70S AND LOWS IN THE 50S THROUGHOUT THE NORTH PLATTE
FORECAST AREA.
.LBF...NONE
SPRINGERIn the hours before
Local storm report, Jun 8, 5:28 PM CDT, 2 hours 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
528 PM CDT TUE JUN 8 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0525" PM 9 S ARTHUR NE 0.75 INCH HAIL
06/08/99 ARTHUR
FWMLocal storm report, Jun 8, 7:44 PM CDT, 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
744 PM CDT TUE JUN 8 1999
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0735 PM 15 SSW MULLEN NE 2.50 INCH HAIL
06/08/99 HOOKER
FWMThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 7:23 PM CDT | Severe Thunderstorm Warning | LBF | Hooker | 62 min |
| Jun 8, 7:26 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 34 min |
| Jun 8, 8:10 PM CDT | Severe Thunderstorm Warning | LBF | Brown | 55 min |
| Jun 8, 8:34 PM CDT | Severe Thunderstorm Warning | LBF | Brown | 61 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.