Alert archive / Nebraska / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 81, NWS North Platte, NE

June 12, 2003Blaine County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 12, 2003, 8:03 PM CDT for Blaine County, Nebraska. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 12, 2003, 8:03 PM CDT (01:03 UTC)
Expired: Jun 12, 2003, 9:00 PM CDT
In force: 57 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Blaine County, NE

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.1 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-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: 1586 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1439 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

606 
WUUS53 KLBF 130103
SVRLBF
NEC009-130200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
803 PM CDT THU JUN 12 2003

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BLAINE COUNTY IN NORTH CENTRAL NEBRASKA

* UNTIL 900 PM CDT

* AT 757 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE MOST DANGEROUS PART OF A SEVERE THUNDERSTORM 5 MILES SOUTH OF
  DUNNING...OR ABOUT 19 MILES SOUTHWEST OF BREWSTER...MOVING
  NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OVER DUNNING AROUND 815 PM CDT
  6 MILES WEST OF BREWSTER AROUND 900 PM CDT

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.

LAT...LON 4176 10024 4174 9993 4207 9969 4207 10024

$$

DP

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 12, 2:00 PM CDT, 6 hours 3 minutes earlier.

Area forecast discussion, Jun 12, 2:00 PM CDT, 6 hours 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
200 PM CDT THU JUN 12 2003

MAIN FOCUS TONIGHT WILL BE FRONTAL POSITION AND SEVERE THREAT AS
ATMOSPHERE DESTABILIZES LATE THIS AFTERNOON.

QUASI STATIONARY FRONT ACROSS SANDHILLS PER SATELLITE/SFC OBS SHOULD
ACTIVATE AN E-W ELONGATED TSRA CLUSTER LATE THIS AFTN AND TONIGHT.
EASTERLY UPSLOPE IS DEEPENING PER KLNX VWP.  TCU ARE BEGINNING TO
BUILD AT 1830Z.  CAPE AND SHEAR SUGGEST SLOWLY ROTATING THUNDERSTORMS
THIS EVENING WITH A FEW STORMS REACHING SVR LIMITS.  WIND AND HAIL
THE MAIN THREAT.

SHORT WAVE ADVANCING THRU COLORADO THIS AFTN AND ONTO THE PLAINS
TONIGHT WILL PROVIDE ADDITIONAL FOCUS FRIDAY MORNING WITH ACTIVITY
CONTINUING AND PERHAPS REENERGIZING DURING THE AFTN THRU EVENING.

THRU SATURDAY...WINDS ALOFT CONTINUE TO WEAKEN PROVIDING LESS
SHEAR. TEMPS ALOFT ALSO WARM.  SHORT WAVE SHOULD EXIT THE AREA IN
THE LATE SATURDAY AFTN WITH ACTIVITY QUICKLY ENDING BY SAT NIGHT.

WILL TAKE A LOOK AT 18Z ETA BEFORE FINALIZING FCST.

SUN-THUR...ATM APPEARS TO QUASI-BAROTROPIC.  WEAK WINDS AND MOIST.
LACKING SIGNIFICANT FORCING...FCST IS DRY AND SEASONABLE.

.LBF...NONE.

CDC

Hazardous weather outlook, Jun 12, 3:45 PM CDT, 4 hours 18 minutes before

NEZ004>010-022>029-035>038-056>059-069>071-094-131100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
345 PM CDT THU JUN 12 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND NORTH CENTRAL
NEBRASKA.

.DAY ONE...TONIGHT
THERE IS A SLIGHT CHANCE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS
TONIGHT ACROSS PORTIONS OF WESTERN NEBRASKA. THE BEST CHANCE FOR
SEVERE STORMS WILL BE WEST OF A LINE FROM CURTIS...IN NORTHERN
FRONTIER COUNTY...TO RUSHVILLE IN NORTHERN SHERIDAN COUNTY.

THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING IN THE WESTERN
MOST PORTION OF THE OUTLOOK AREA...GENERALLY AFTER 5 PM MDT. THE
ATMOSPHERE IS THIS AREA WILL BE QUITE UNSTABLE...AND AS AN UPPER
LEVEL DISTURBANCE APPROACHES...THUNDERSTORMS ARE EXPECTED TO
DEVELOP. WITH PLENTY OF MOISTURE AND UNSTABLE AIR IN PLACE...THE
STORMS THAT DO DEVELOP INITIALLY WILL HAVE THE POTENTIAL TO PRODUCE
LARGE HAIL...PRIMARILY...AND POSSIBLY DAMAGING WINDS. A STALLED
FRONTAL BOUNDARY WILL ALSO REMAIN ACROSS THE OUTLOOK AREA AS
WELL...AND MAY ALSO PROVIDE A FOCUS FOR THUNDERSTORM DEVELOPMENT
LATER THIS EVENING. THESE STORMS ARE EXPECTED TO DEVELOP INTO A
LARGER COMPLEX ACROSS THE WESTERN PORTION OF THE OUTLOOK AREA AFTER
SUNSET...WITH THE MAIN SEVERE WEATHER THREAT TURNING TO HEAVY
RAIN...SINCE THE MOVEMENT OF THE STORMS IS EXPECTED TO BE SLOW.

THE THUNDERSTORM COMPLEX...IF IT DEVELOPS AS EXPECTED...SHOULD
WEAKEN AS IT MOVES SLOWLY EAST INTO SOUTHWEST NEBRASKA THROUGH THE
NIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
AN ACTIVE UPPER LEVEL PATTERN WILL CONTINUE FOR FRIDAY...BRINGING
THE CHANCE FOR THUNDERSTORMS ONCE AGAIN TO THE OUTLOOK AREA.
HOWEVER...CLOUD COVER MAY LIMIT INSTABILITY DURING THE
DAY...THEREFORE SEVERE WEATHER WILL NOT BE AS LIKELY. ANOTHER CHANCE
FOR THUNDERSTORMS WILL EXIST ON SATURDAY. A DRIER WEATHER PATTERN IS
THEN EXPECTED FOR THE REMAINDER OF THE PERIOD.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS MAY BE NEEDED LATER TONIGHT IN THE WESTERN PORTION OF THE
OUTLOOK AREA TO PROVIDE INFORMATION CONCERNING HAIL AND RAINFALL
AMOUNTS.

JWS

In the hours before

Local storm report, Jun 12, 7:48 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
0748 PM CDT THU JUN 12 2003

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

0730 PM    6 SSW ANSELMO             NE   1.00 IN HAIL
06/12/03   CUSTER

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 7:28 PM CDT	Severe Thunderstorm Warning	LBF	Custer	62 min
Jun 12, 9:00 PM CDT	Severe Thunderstorm Warning	LBF	Blaine	45 min
Jun 12, 11:07 PM CDT	Severe Thunderstorm Warning	LBF	Grant	53 min
Jun 12, 11:36 PM CDT	Severe Thunderstorm Warning	LBF	Garden	54 min
Jun 13, 12:01 AM CDT	Severe Thunderstorm Warning	LBF	Grant	59 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2003 Every severe thunderstorm warning in 2003

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.