Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 182, NWS North Platte, NE

July 2, 1998Arthur County, Garden County, Grant County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 2, 1998, 10:51 PM MDT for Arthur County, Garden County, Grant County, Nebraska. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 2, 1998, 10:51 PM MDT (04:51 UTC)
Expired: Jul 2, 1998, 11:50 PM MDT
In force: 59 min
Issued by: NWS North Platte, NE
Area: Whole counties

Counties Arthur County, NE, Garden County, NE, Grant County, NE

The radar

The North Platte radar (KLNX), 115 km from the middle of the area, began a volume at 04:50 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.

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 2, 10:00 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.9 hours before the alert went out and 127 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: 2041 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1697 m above ground
0-6 km bulk shear: 148 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 17.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 030447 RRA
SVRLBF
NEC005-069-075-030550-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1151 PM CDT (1051 PM MDT) THU JUL 2 1998

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ARTHUR COUNTY IN WEST CENTRAL NEBRASKA
  GARDEN COUNTY IN THE NEBRASKA PANHANDLE
  GRANT COUNTY IN WEST CENTRAL NEBRASKA

* UNTIL 1150 PM MDT (1250 AM CDT)

* AT 1049 PM MDT... NORTH PLATTE DOPPLER RADAR INDICATED A LINE OF
  SEVERE THUNDERSTORMS EXTENDING FROM 30 MILES WEST OF HYANNIS OR
  70 MILES WEST OF MULLEN...TO 30 MILES WEST SOUTHWEST OF ARTHUR
  OR 80 SOUTHWEST OF MULLEN MOVING EAST NORTHEAST AT 30 MPH.


* THE SEVERE THUNDERSTORMS WILL BE NEAR...

   HYANNIS BY 1135 AM MDT...
   ARTHUR BY 1135 AM MDT (1235 AM CDT.)

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

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 2, 1:47 PM MDT, 9 hours 4 minutes earlier.

Area forecast discussion, Jul 2, 1:47 PM MDT, 9 hours 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
247 PM CDT THU JUL 2 1998

...FORECAST PROBLEM WILL BE POPS...

UPPER PATTERN HAS NOT CHANGED WITH 500 RIDGE OVER CENTRAL U.S. AND
TROUGH IN WESTERN U.S. 500 RIDGE STILL IN FIRM CONTROL WITH WEAK
SHORTWAVES MOVING THROUGH THE RIDGE. POPS ARE POSSIBLE THRU THE
PERIOD.

PROBLEMS THROUGH THE PERIOD WILL BE POPS. 700 AND 850 THTE RIDGES
REMAIN STATIONARY ACROSS CWA THRU 48 HOURS WITH LLJ THROUGH THE PERIOD.
LMVV FROM ETA AND NGM IN 850-700...700-500 AND 500-300 LAYERS HINT AT
MCS TOMORROW NIGHT IN EASTERN NEBRASKA AND NEAR BLACK HILLS WHICH WOULD
MOVE ACROSS NORTHERN NEBRASKA WITH UPWARD VERTICAL VELOCITIES WITH LMRH
VALUES IN 40-60 PERCENT. LMVV NOT VERY ORGANIZED TONIGHT THOUGH. Q
VECTORS NOT VERY ORGANIZED EITHER IN THE 850-700...700-500 AND 500-300
LAYERS THROUGH THE PERIOD. 18Z SFC CHART SHOWED LOW OVER SE CO WITH
WARM FRONT OVER SW KS INTO OKC THROUGH LIT WITH DEW POINTS IN THE 60S
ACROSS CWA. UPSLOPE FLOW WILL CONTINUE THROUGH THE PERIOD WITH 850 DEW
POINTS OF 8-16 DEGREES THROUGH THE PERIOD WITH ETA SHOWING PRETTY
POTENT 850 WARMFRONT WITH GOOD CONVERGENCE OVER HSI CWA AT 36 HOURS.
CAPE VALUES TONIGHT IN 1000-2000 J/KG RANGE WITH CIN IN -40 IN THE WEST
TO -80 IN THE EAST. CAPE TOMORROW NIGHT AT 00Z IN 700-2500 J/KG RANGE
WITH CIN VALUES -40 IN SOUTH TO -100 IN NORTHWEST. WITH THIS IN
MIND...FEEL THERE IS THREAT OF HEAVY RAINFALL THROUGH THE PERIOD. WILL
GO HIGHEST POPS IN NE CWA WITH 50 TONIGHT AND LOWER POPS ELSEWHERE AND
GO HIGH POPS IN NORTH TOMORROW NIGHT FOR POSSIBLE MCS IN BLACK HILLS
AND EASTERN NEB. FEEL SOUTH COULD BE CAPPED AND WILL GO LOWEST POPS DUE
TO 700 TEMPS IN 13-16 DEGREE RANGE TOMORROW ACROSS CWA.

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

CCF
LBF BB 065/091 064/091 066 703231  ANW BB 066/088 066/085 067 705352
OGA BB 065/091 064/091 066 703231  ONL BB 06Z7/088 067/084 067 705352
IML BB 066/092 065/092 067 703231  BBW BB 066/090 066/088 067 704242
VTN BB 065/089 064/085 066 704242

MICHELS

In the hours before

Local storm report, Jul 2, 9:50 PM MDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
1050 PM CDT WED JUL 02 1998

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

1004 PM    5N 1W VALENTINE           NE   1.75 INCH HAIL
07/01/98   CHERRY

1030 PM    VALENTINE                 NE   0.75 INCH HAIL
06/29/98   CHERRY

BUTLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 9:39 PM MDT	Severe Thunderstorm Warning	LBF	Garden	66 min
Jul 2, 9:47 PM MDT	Tornado Warning	LBF	Garden	63 min
Jul 2, 10:39 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	61 min
Jul 2, 11:29 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	61 min
Jul 3, 12:15 AM MDT	Severe Thunderstorm Warning	LBF	Blaine, Loup	45 min
Jul 3, 12:20 AM MDT	Severe Thunderstorm Warning	LBF	Hooker	50 min
Jul 3, 12:44 AM MDT	Severe Thunderstorm Warning	LBF	Thomas	66 min
Jul 3, 1:04 AM MDT	Severe Thunderstorm Warning	LBF	Loup	46 min
Jul 3, 1:15 AM MDT	Severe Thunderstorm Warning	LBF	Brown	65 min
Jul 3, 1:18 AM MDT	Severe Thunderstorm Warning	LBF	Logan	32 min
Jul 3, 1:58 AM MDT	Severe Thunderstorm Warning	LBF	Loup, Rock	62 min
Jul 3, 2:30 AM MDT	Severe Thunderstorm Warning	LBF	Garfield	65 min
Jul 3, 2:59 AM MDT	Severe Thunderstorm Warning	LBF	Holt, Wheeler	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.