Alert archive / Nebraska / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 237, NWS North Platte, NE

August 11, 2006Brown County, Rock County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 11, 2006, 8:13 PM CDT for Brown County, Rock County, Nebraska. It was in force for 62 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: Aug 11, 2006, 8:13 PM CDT (01:13 UTC)
Expired: Aug 11, 2006, 9:15 PM CDT
In force: 62 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

Counties Brown County, NE, Rock County, NE

The radar

The North Platte radar (KLNX), 105 km from the middle of the area, began a volume at 01:13 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.

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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 11, 7:25 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.2 hours before the alert went out and 179 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: 2404 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1855 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLBF 120113
SVRLBF
NEC017-149-120215-
/O.NEW.KLBF.SV.W.0237.060812T0113Z-060812T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
813 PM CDT FRI AUG 11 2006

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ROCK COUNTY IN NORTH CENTRAL NEBRASKA...
  BROWN COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 915 PM CDT

* AT 808 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 14 MILES NORTH OF NEWPORT TO
  JOHNSTOWN...OR ALONG A LINE EXTENDING FROM 18 MILES NORTHEAST OF
  BASSETT TO 8 MILES NORTHWEST OF AINSWORTH...AND MOVING SOUTHEAST AT
  15 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  AINSWORTH BY 835 PM CDT...
  MOON LAKE...LONG PINE AND BASSETT BY 850 PM CDT...
  NEWPORT BY 900 PM CDT...
  LONG LAKE STATE WILDLIFE MANAGEMENT AREA BY 910 PM CDT...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4239 9925 4223 10013 4223 10013 4278 10016
      4271 9973 4272 9957 4271 9952 4277 9941
      4279 9926 4248 9924

$$

SPRINGER

2 follow-up statements

000 
WWUS53 KLBF 120156
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
856 PM CDT FRI AUG 11 2006

NEC017-120206-
/O.CAN.KLBF.SV.W.0237.000000T0000Z-060812T0215Z/
BROWN NE-
856 PM CDT FRI AUG 11 2006

...THE SEVERE THUNDERSTORM WARNING FOR BROWN COUNTY IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
FRIDAY EVENING FOR NORTHWESTERN NEBRASKA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1100 PM CDT FRIDAY EVENING FOR NORTH
CENTRAL NEBRASKA.

LAT...LON 4223 9925 4212 9965 4270 9966 4271 9952
      4279 9926 4248 9924

$$

NEC149-120215-
/O.CON.KLBF.SV.W.0237.000000T0000Z-060812T0215Z/
ROCK NE-
856 PM CDT FRI AUG 11 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR ROCK COUNTY...

AT 854 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES SOUTHEAST OF NEWPORT
TO 6 MILES SOUTHWEST OF BASSETT...OR ALONG A LINE EXTENDING FROM 17
MILES EAST OF BASSETT TO 6 MILES SOUTHWEST OF BASSETT...MOVING SOUTH
AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  HIGHWAY 183 MILE MARKER 170...PONY LAKE AND 7 MILES NORTH OF TWIN
  LAKES STATE WILDLIFE MANAGEMENT AREA BY 915 PM CDT...

LAT...LON 4223 9925 4212 9965 4270 9966 4271 9952
      4279 9926 4248 9924

$$

SPRINGER

000 
WWUS53 KLBF 120214
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
915 PM CDT FRI AUG 11 2006

NEC149-120225-
/O.EXP.KLBF.SV.W.0237.000000T0000Z-060812T0215Z/
ROCK NE-
915 PM CDT FRI AUG 11 2006

...THE SEVERE THUNDERSTORM WARNING FOR ROCK COUNTY EXPIRES AT 915 PM
CDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
FRIDAY EVENING FOR NORTHWESTERN NEBRASKA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1100 PM CDT FRIDAY EVENING FOR NORTH
CENTRAL NEBRASKA.

LAT...LON 4223 9925 4212 9965 4270 9966 4271 9952
      4279 9926 4248 9924

$$

SPRINGER

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 Aug 11, 2:58 PM CDT, 5 hours 15 minutes earlier.

Area forecast discussion, Aug 11, 2:58 PM CDT, 5 hours 15 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
258 PM CDT FRI AUG 11 2006

.DISCUSSION...

NEAR TERM (TONIGHT THROUGH MONDAY)...MAIN FORECAST CHALLENGE OVER
THE NEXT TWO DAYS IS PRECIPITATION CHANCES...FIRST TONIGHT ACROSS
THE NORTH...THEN THE ENTIRE CWA FOR SATURDAY NIGHT...WITH THE
ARRIVAL OF A PRE FRONTAL TROF AND COLD FRONT ON SUNDAY. WV IMAGERY
INDICATING A VIGOROUS SHORTWAVE TROF OVER FAR ERN MT AND NERN
WYOMING THIS AFTERNOON. THIS FEATURE...CONTINUES TO APPROACH THE WRN
DAKOTAS AND NWRN NEBRASKA THIS AFTERNOON. AS OF 19Z CONVECTION IS
ALREADY FIRING ACROSS WRN SO DAKOTA...ERN WYOMING AND THE NEBR
PANHANDLE. LAPS DATA AT 18Z INDICATING A QUICKLY ERODING CAP OVER
THE NORTHWEST. WILL CONTINUE MENTION OF POPS...MAINLY NORTH AND WEST
OF NORTH PLATTE FOR THIS EVENING. SVR THREAT AND SCATTERED
CONVECTION IS EXPECTED ACROSS THE NRN TIER OF COUNTIES...UNDER THE
STRONGEST MID LEVEL WARM AIR ADVECTION...AND CLOSEST PROXIMITY TO
JET DYNAMICS. FURTHER SOUTH...CAP STRENGTH IS STRONG THIS AFTERNOON
AND EVENING...SO INITIATION ISNT EXPECTED. ON SATURDAY...THE PRE
FRONTAL TROF ARRIVES IN THE NORTHWEST EARLY AFTERNOON. MODEL
SOUNDINGS INDICATING VIRTUALLY NO CAP IN PLACE BY 20Z ACROSS THE WRN
CWA...SO CONVECTION SHOULD INITIATE QUICKLY EARLY AFTERNOON. DEEP
LAYER SHEAR OF 25 TO 35 KTS EXPECTED TOMORROW AFTERNOON...SO SOME
SUPERCELLS ARE POSSIBLE...WITH THE MAIN THREAT BEING LINEAR STORMS
WITH WIND DAMAGE. ACTIVITY IS EXPECTED TO MOVE INTO THE ERN CWA OVER
NIGHT. HOWEVER...ADDITIONAL STORMS ARE EXPECTED TO DEVELOP WITH THE
ARRIVAL OF THE COLD FRONT ON SUNDAY. RIGHT NOW...THIS FEATURE IS
EXPECTED TO ARRIVE AT LBF BY 18Z AND HAVE PAINTED POPS ACROSS THE
EASTERN CWA FOR SUNDAY. COOLER TEMPS AND DRY CONDS ARE EXPECTED FOR
MONDAY...AS HIGH PRESSURE BUILDS INTO THE NORTHERN PLAINS...DRIVING
THE FRONT WELL SOUTH OF THE CWA.

LONG RANGE (MONDAY NIGHT THROUGH FRIDAY)...DIFFERENCES NOTED THIS
MORNING BETWEEN THE GFS AND NAM RUNS...PARTICULARLY WITH THE POSN OF
THE FRONTAL BOUNDARY EARLY NEXT WEEK. THE NAM SOLN SEEMS TO BE
PUSHING THIS FEATURE FURTHER SOUTH COMPARED TO THE GFS SOLN. AM
FAVORING THE NAM AT THIS JUNCTURE...SO WILL CONTINUE DRY FCST FOR
MONDAY NIGHT. THE FRONTAL BOUNDARY WILL BE WELL SOUTH OF THE FA ON
TUESDAY AS WELL AND WILL CONTINUE WITH A DRY FCST. BY
WEDNESDAY...THE FRONT WILL LIFT NORTH AS A WARM FRONT...AS SURFACE
TROFING STRENGTHENS ACROSS THE HIGH PLAINS OF MT...ERN WY AND ERN
COLORADO. THETA E RIDGING WILL EXTEND INTO THE WRN PANHANDLE BY WEDS
AFTERNOON...WITH THE H5 PATTERN TRANSITIONING TO SWRLY. HAVE
INSERTED POPS FOR BOTH WEDNESDAY AND THURSDAY...DURING THE AFTERNOON
AND EVENING HOURS. MOISTURE WILL BE PREVALENT ACROSS WESTERN AND
NORTH CENTRAL NEBRASKA...COUPLED WITH ACTIVE SWRLY FLOW. GENERALLY
FOLLOWED MEX GUIDANCE FOR TEMPERATURES NEXT WEEK WITH HIGHS IN THE
UPPR 80S TO LWR 90S EXPECTED.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...NONE.

CLB

Hazardous weather outlook, Aug 11, 3:29 PM CDT, 4 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
329 PM CDT FRI AUG 11 2006

NEZ004>010-022>029-035>038-056>059-069>071-094-121200-
SHERIDAN-EASTERN CHERRY-KEYA PAHA-BOYD-BROWN-ROCK-HOLT-GARDEN-
GRANT-HOOKER-THOMAS-BLAINE-LOUP-GARFIELD-WHEELER-ARTHUR-MCPHERSON-
LOGAN-CUSTER-DEUEL-KEITH-PERKINS-LINCOLN-CHASE-HAYES-FRONTIER-
WESTERN CHERRY-
329 PM CDT FRI AUG 11 2006 /229 PM MDT FRI AUG 11 2006/

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

.DAY ONE...TONIGHT.

THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE ACROSS NORTHERN
PORTIONS OF THE PANHANDLE INTO THE NORTHERN SANDHILLS AND PORTIONS
OF NORTH CENTRAL NEBRASKA THIS EVENING. WIDESPREAD SEVERE WEATHER
IS NOT EXPECTED BUT AN ISOLATED THUNDERSTORM MAY REACH SEVERE
LIMITS WITH DAMAGING WIND GUSTS AND HAIL UP TO THE SIZE OF
QUARTERS BEING THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SATURDAY AND SUNDAY....SCATTERED AFTERNOON...EVENING AND NIGHT
TIME THUNDERSTORMS WILL BECOME SEVERE WITH WIND DAMAGE AND LARGE HAIL.
ACTIVITY WILL BE ASSOCIATED WITH A SLOW MOVING COLD FRONT...ABUNDANT
MOISTURE AND STRONG WINDS ALOFT. THUS THE ACTIVITY WILL TEND TO DEVELOP
NORTH AND REDEVELOP FARTHER SOUTH EACH DAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION BE NEEDED ACROSS NORTHERN NEBRAKSA THIS EVENING.

&&

THIS PRODUCT IS NOW AVAILABLE...ALONG WITH OTHER WEATHER...
HYDROLOGICAL AND CLIMATE INFORMATION...AT
HTTP://WWW.CRH.NOAA.GOV/LBF(ALL LOWERCASE)

13

In the hours before

Local storm report, Aug 11, 3:57 PM CDT, 4 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
357 PM CDT FRI AUG 11 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1030 PM     TSTM WND DMG     11 NNE SPRINGVIEW       42.97N 99.67W
08/10/2006                   KEYA PAHA          NE   PUBLIC

            TREE LIMBS APPROXIMATELY 6 TO 7 INCHES IN DIAMETER BLOWN
            DOWN.

&&

ADO

Local storm report, Aug 11, 4:59 PM CDT, 3 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
459 PM CDT FRI AUG 11 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1055 PM     TSTM WND DMG     7 N AINSWORTH           42.65N 99.86W
08/10/2006                   BROWN              NE   PUBLIC

            LARGE TREES REPORTED BLOWN OVER AND TREE LIMBS 6 INCHES
            IN DIAMETER BLOWN DOWN.

&&

ADO

Local storm report, Aug 11, 5:03 PM CDT, 3 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
503 PM CDT FRI AUG 11 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0445 PM     HAIL             1 NE KILGORE            42.95N 100.94W
08/11/2006  E0.88 INCH       CHERRY             NE   CO-OP OBSERVER

            NICKEL SIZED HAIL REPORTED LASTING 15 MINUTES.

&&

ADO

Local storm report, Aug 11, 6:29 PM CDT, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
629 PM CDT FRI AUG 11 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0615 PM     HAIL             4 S NENZEL              42.87N 101.10W
08/11/2006  E2.00 INCH       CHERRY             NE   PUBLIC

            HAIL 2 INCHES IN DIAMETER REPORTED LASTING APPROXIMATELY
            15 MINUTES.

&&

ADO

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 7:12 PM CDT	Tornado Warning	LBF	Cherry	33 min
Aug 11, 7:37 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry	53 min
Aug 11, 7:57 PM CDT	Severe Thunderstorm Warning	LBF	Keya Paha	63 min
Aug 11, 8:28 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	47 min
Aug 11, 8:43 PM CDT	Tornado Warning	LBF	Cherry	32 min
Aug 11, 9:13 PM CDT	Severe Thunderstorm Warning	LBF	Holt	62 min
Aug 11, 9:16 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	23 min
Aug 12, 2:06 PM CDT	Severe Thunderstorm Warning	LBF	Arthur, Grant	39 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2006 Every severe thunderstorm warning in 2006

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.