Alert archive / Nebraska / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 4, NWS North Platte, NE

April 6, 2006Logan County, Thomas County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 6, 2006, 4:53 PM CDT for Logan County, Thomas County, Nebraska. It was in force for 37 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 6, 2006, 4:53 PM CDT (21:53 UTC)
Expired: Apr 6, 2006, 5:30 PM CDT
In force: 37 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

Counties Logan County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 17 km from the middle of the area, began a volume at 21:53 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
Apr 6, 5:11 PM CDT	HAIL 0.88	8 S Thedford, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 12:00Z, 9.9 hours before the alert went out and 76 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1708 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -236 m²/s²
0-3 km storm-relative helicity: -299 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLBF 062153
SVRLBF
NEC113-171-062230-
/O.NEW.KLBF.SV.W.0004.060406T2153Z-060406T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
453 PM CDT THU APR 6 2006

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LOGAN COUNTY IN WEST CENTRAL NEBRASKA
  THOMAS COUNTY IN NORTH CENTRAL NEBRASKA

* UNTIL 530 PM CDT

* AT 449 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR HIGHWAY 83 MILE
  MARKER 130...OR ABOUT 17 MILES NORTH OF STAPLETON...AND MOVING
  NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HIGHWAY 83 MILE MARKER 130 BY 500 PM CDT
  HIGHWAY 83 MILE MARKER 135 BY 505 PM CDT
  HIGHWAY 83 MILE MARKER 140 BY 515 PM CDT
  7 MILES SOUTHEAST OF HIGHWAY 2 MILE MARKER 210...HIGHWAY 2 MILE
  MARKER 215...HIGHWAY 2 MILE MARKER 220 AND 9 MILES WEST OF HIGHWAY
  2 MILE MARKER 225 BY 530 PM CDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4176 10081 4176 10070 4164 10069 4165 10030
      4206 10033 4207 10083

$$

13

1 follow-up statement

000 
WWUS53 KLBF 062221
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
521 PM CDT THU APR 6 2006

NEC113-062231-
/O.CAN.KLBF.SV.W.0004.000000T0000Z-060406T2230Z/
LOGAN NE-
521 PM CDT THU APR 6 2006

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

IF SEVERE WEATHER WAS OBSERVED...PLEASE CONTACT YOUR LOCAL LAW
ENFORCEMENT AGENCY AND HAVE THEM PASS THE REPORT TO THE NATIONAL
WEATHER SERVICE OFFICE IN NORTH PLATTE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTH CENTRAL NEBRASKA.

LAT...LON 4176 10081 4176 10071 4179 10033 4206 10033
      4207 10083

$$

NEC171-062230-
/O.CON.KLBF.SV.W.0004.000000T0000Z-060406T2230Z/
THOMAS NE-
521 PM CDT THU APR 6 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR THOMAS COUNTY...

AT 518 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR HIGHWAY
83 MILE MARKER 141...OR ABOUT 7 MILES SOUTH OF THEDFORD...MOVING
NORTH AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  HIGHWAY 2 MILE MARKER 208 AND 9 MILES EAST OF HIGHWAY 2 MILE MARKER
  204 BY 525 PM CDT
  HIGHWAY 83 MILE MARKER 151...HIGHWAY 83 MILE MARKER 152...HIGHWAY
  83 MILE MARKER 153 AND HIGHWAY 83 MILE MARKER 154 BY 530 PM CDT

IF SEVERE WEATHER WAS OBSERVED...PLEASE CONTACT YOUR LOCAL LAW
ENFORCEMENT AGENCY AND HAVE THEM PASS THE REPORT TO THE NATIONAL
WEATHER SERVICE OFFICE IN NORTH PLATTE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTH CENTRAL NEBRASKA.

LAT...LON 4176 10081 4176 10071 4179 10033 4206 10033
      4207 10083

$$

13

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 Apr 6, 2:30 PM CDT, 2 hours 23 minutes earlier.

Area forecast discussion, Apr 6, 2:30 PM CDT, 2 hours 23 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
230 PM CDT THU APR 6 2006

THE FORECAST FOR THIS CYCLE FOCUSES ON SEVERAL PARAMETERS TONIGHT
THROUGH FRIDAY. DISPOSITION OF THE HIGH WIND WATCH AND WARNING IS A
PRIORITY ALONG WITH THE COVERAGE...TYPE AND CHARACTER OF
PRECIPITATION.

.NEAR TERM...
    STRONG COLD ADVECTION IN THE LOWER 100MB OF THE TROPOSPHERE WILL
ALLOW FOR THE 45-55KT WIND AT 800MB TO MIX DOWN TO THE SURFACE...
ESPECIALLY IN THE WESTERN HALF OF THE STATE. KNOCKING OFF SOME FOR
FRICTION...WE ARE STILL CONSIDERING HIGH END ADVISORY CRITERIA IN
THE CENTRAL AND NORTH CENTRAL ZONES TO LOW END WARNING CRITERIA IN
THE WEST AND SOUTHWEST.
    TURNING ATTENTION TO PRECIPITATION...THE STORM SYSTEM CROSSING
NEBRASKA IS LIKELY TO PRODUCE THUNDERSTORMS INITIALLY WITH ELEVATED
CONVECTION IN THE WRAPAROUND OVER NORTHERN AND WESTERN NEBRASKA
UNTIL ABOUT 06Z WHEN IT STRATIFIES. BECAUSE 850-700MB THICKNESS IS
AT OR BELOW 1545M AT 12Z...SNOW WILL PROBABLY MIX WITH THE RAIN IN
THE WEST UNTIL EARLY FRIDAY AFTERNOON. THEN...THE PRECIPITATION IS
EXPECTED TO TAPER OFF FROM THE NORTH.
    A QUIET PERIOD IS THEN EXPECTED SATURDAY AND SUNDAY WITH WARMER
TEMPERATURES AS AN UPPER RIDGE MOVES OVER THE PLAINS.
&&

.EXTENDED...
    RETURN FLOW BEGINNING SUNDAY WILL BRING GULF MOISTURE UP INTO
CENTRAL AND WESTERN NEBRASKA AHEAD OF ANOTHER FRONT/STORM SYSTEM.
THE FRONT IS EXPECTED TO CROSS NEBRASKA MONDAY NIGHT AND TUESDAY.
CONVERGENCE WITH THE SYSTEM AND ELEVATED FRONTOGENESIS WILL GENERATE
ENOUGH LIFT FOR PRECIPITATION TO DEVELOP. THE 800MB BASED LIFTED
INDICES INDICATE INSTABILITY...SO THE CHARACTER OF THE PRECIPITATION
WILL BE CONVECTIVE. THUS WE ARE PUTTING IN A CHANCE FOR
THUNDERSTORMS MONDAY NIGHT AND TUESDAY ENDING TUESDAY NIGHT. THEN IT
APPEARS THAT THE NEXT CHANCE IS LATE THURSDAY OR FRIDAY WITH ANOTHER
SYSTEM. FOR THE TIME BEING...WE WILL GO WITH A TOKEN MENTION OF A
SLIGHT CHANCE IN NORTH CENTRAL NEBRASKA THURSDAY AFTERNOON AND
EVENING.
&&

.SYNOPSIS...
    AT 19Z...6.7U IMAGERY SHOWED A MATURE CYCLONE OVER THE
YELLOWSTONE PARK REGION. THE COMPOSITE RADAR IMAGE SHOWED
THUNDERSTORMS ACROSS THE MIDDLE OF SOUTH DAKOTA AND IN CENTRAL
KANSAS. CONVECTIVE DEVELOPMENT WAS ALSO INDICATED IN SOUTHWEST
NEBRASKA IN THE AREA OF ELEVATED FRONTOGENESIS INDICATED BY 6.7U
IMAGERY. ANALYSIS OF THE 19Z MSL DATA SHOWED A 988MB LOW PRESSURE
CENTER IN NORTHWEST KANSAS NEAR HILL CITY AND ANOTHER 989MB CENTER
IN CENTRAL NEBRASKA SOUTHEAST OF KEARNEY. A COLD FRONT WAS STRETCHED
FROM THE KANSAS LOW INTO THE OKLAHOMA PANHANDLE WEST OF GAGE. THE
DRY LINE RUNNING FROM EAST OF HAYES AND GREAT BEND KANSAS TO JUST
WEST OF WICHITA.
&&

LBF WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WARNING 07/06Z-08/00Z...NEZ004-094-022>024-035/036-056>059
                                  -069>071
WIND ADVISORY 07/06Z-08/00Z...NEZ005>010-025>029-037-038
&&

SPRINGER

Hazardous weather outlook, Apr 6, 3:37 PM CDT, 1 hour 16 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
337 PM CDT THU APR 6 2006

NEZ004>010-022>029-035>038-056>059-069>071-094-071200-
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-
337 PM CDT THU APR 6 2006 /237 PM MDT THU APR 6 2006/

...HIGH WIND WARNING THROUGH FRIDAY WEST OF A NORTH PLATTE TO
VALENTINE LINE AND WIND AVISORY EAST THROUGH FRIDAY...

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

.DAY ONE...TONIGHT.

THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE ACROSS A LARGE PART OF
THE OUTLOOK AREA THROUGH MIDNIGHT. SOME OF THESE STORM MAY CONTAIN
LARGE HAIL AND DAMAGING WIND GUSTS...ESPECIALLY EAST OF HIGHWAY
83. THE THUNDERSTORM THREAT WILL DECREASE AFTER MIDNIGHT HOWEVER
NORTH WINDS ARE EXPECTED TO INCREASE TO 25 TO 40 MPH. GUSTS OVER
50 MPH WILL ALSO BE POSSIBLE WEST OF A VALENTINE TO NORTH PLATTE
LINE. THE RAINFALL MAY MIX WITH OR CHANCE TO SNOW OVER WESTERN
PORTIONS OF THE AREA...MAINLY WEST OF HIGHWAY 61 AND WHEN COMBINED
WITH THE STRONG WINDS...PRODUCE AREAS OF LIMITED VISIBILITIES.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

NORTH TO NORTHEAST WINDS WILL REMAIN IN THE 25 TO 40 MPH RANGE
THROUGH MUCH OF THE DAY ON FRIDAY...AND CONTAIN GUSTS UP TO 50 MPH
EAST OF A VALENTINE TO NORTH PLATTE LINE. SNOW MAY COMBINE WITH
THE WIND TO LIMIT VISIBILITIES THROUGH THE MORNING HOURS...HOWEVER
THE WET WEATHER IS EXPECTED TO LIMIT BLOWING DUST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING ACROSS AREAS ALONG
AND EAST OF HIGHWAY 83.

&&

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, Apr 6, 4:12 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
412 PM CDT THU APR 06 2006

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

0410 PM     HAIL             6 S SENECA              41.96N 100.83W
04/06/2006  E1.00 INCH       THOMAS             NE   PUBLIC

&&

JSWEET

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 3:48 AM CDT	High Wind Warning	LBF	Arthur, Chase, Cherry, Deuel, Frontier, Garden and 8 more	35 hr
Apr 6, 2:52 PM CDT	Wind Advisory	LBF	Blaine, Boyd, Brown, Chase, Cherry, Custer and 13 more	28 hr
Apr 6, 4:01 PM CDT	Severe Thunderstorm Warning	LBF	Hooker, Thomas	44 min
Apr 6, 4:30 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	45 min
Apr 6, 4:46 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry	59 min
Apr 6, 5:09 PM CDT	Severe Thunderstorm Warning	LBF	Wheeler	20 min
Apr 6, 5:13 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	32 min
Apr 6, 5:24 PM CDT	Severe Thunderstorm Warning	LBF	Custer	51 min
Apr 6, 5:36 PM CDT	Severe Thunderstorm Warning	LBF	Rock	32 min
Apr 6, 5:44 PM CDT	Severe Thunderstorm Warning	LBF	Blaine	46 min
Apr 6, 5:59 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	46 min
Apr 6, 6:18 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	42 min
Apr 6, 6:19 PM CDT	Severe Thunderstorm Warning	LBF	Keya Paha, Rock	56 min
Apr 6, 6:29 PM CDT	Severe Thunderstorm Warning	LBF	Blaine	26 min
Apr 6, 6:41 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Holt	64 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.