Alert archive / Nebraska / Tornado Warnings in 2024

Tornado Warning 21, NWS North Platte, NE

June 20, 2024Brown County, Nebraska

NWS North Platte, NE issued this tornado warning at Jun 20, 2024, 4:49 PM CDT for Brown County, Nebraska. It was in force for 41 min. 2 reports 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: Jun 20, 2024, 4:49 PM CDT (21:49 UTC)
Expired: Jun 20, 2024, 5:30 PM CDT
In force: 41 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

County Brown County, NE

The radar

The North Platte radar (KLNX), 73 km from the middle of the area, began a volume at 21:49 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
Jun 20, 5:10 PM CDT	HAIL 1.5	7 S Ainsworth, NE
Jun 20, 5:30 PM CDT	TORNADO	7 Sse Ainsworth, NE	Delayed tornado report from 5:30 pm CT. Estimated location.

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

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.8 hours before the alert went out and 154 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: 457 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 269 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

204 
WFUS53 KLBF 202149
TORLBF
NEC017-202230-
/O.NEW.KLBF.TO.W.0021.240620T2149Z-240620T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service North Platte NE
449 PM CDT Thu Jun 20 2024

The National Weather Service in North Platte has issued a

* Tornado Warning for...
  Central Brown County in north central Nebraska...

* Until 530 PM CDT.

* At 449 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 10 miles south of Johnstown, or 11 miles southwest of
  Ainsworth, moving east at 15 mph.

  HAZARD...Tornado and ping pong ball size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  central Brown County, including the following locations... Hofeld
  Lake.

This includes Highway 20 between mile markers 243 and 244.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4237 10005 4245 10010 4256 9982 4236 9971
TIME...MOT...LOC 2149Z 251DEG 14KT 4242 10001 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN

$$

Roberg

2 follow-up statements

731 
WWUS53 KLBF 202210
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
510 PM CDT Thu Jun 20 2024

NEC017-202230-
/O.CON.KLBF.TO.W.0021.000000T0000Z-240620T2230Z/
Brown NE-
510 PM CDT Thu Jun 20 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR CENTRAL
BROWN COUNTY...

At 510 PM CDT, a severe thunderstorm capable of producing a tornado
was located 9 miles south of Ainsworth, moving east at 15 mph.

HAZARD...Tornado and golf ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Ainsworth and Hofeld Lake.

This includes Highway 20 between mile markers 243 and 244.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4237 9997 4248 10002 4256 9982 4236 9971
TIME...MOT...LOC 2210Z 260DEG 14KT 4242 9991 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN

$$

Roberg

685 
WWUS53 KLBF 202225
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
525 PM CDT Thu Jun 20 2024

NEC017-202230-
/O.CON.KLBF.TO.W.0021.000000T0000Z-240620T2230Z/
Brown NE-
525 PM CDT Thu Jun 20 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR EAST
CENTRAL BROWN COUNTY...

At 524 PM CDT, a severe thunderstorm capable of producing a tornado
was located 9 miles south of Long Pine, or 10 miles southeast of
Ainsworth, moving east at 20 mph.

HAZARD...Tornado and golf ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Ainsworth and Hofeld Lake.

This includes Highway 20 near mile marker 244.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4237 9992 4249 9999 4256 9982 4236 9971
TIME...MOT...LOC 2224Z 268DEG 19KT 4240 9977 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 4:05 PM CDT	Special Weather Statement	LBF	Brown	40 min
Jun 20, 4:15 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry	45 min
Jun 20, 4:38 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Brown	52 min
Jun 20, 5:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Brown, Rock	48 min
Jun 20, 5:29 PM CDT	Tornado Warning	LBF	Brown, Rock	46 min
Jun 20, 5:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Sheridan	53 min
Jun 20, 6:07 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Garden	68 min
Jun 20, 6:16 PM CDT	Tornado Warning	LBF	Rock	44 min
Jun 20, 6:35 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Cherry, Grant, Sheridan	55 min
Jun 20, 6:50 PM CDT	Flash Flood Warning	LBF	Brown, Rock	9 hr
Jun 20, 6:57 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Holt, Rock	48 min

Nearby

Tornado Warnings in Nebraska, 2024 Every tornado warning in 2024 Tornadoes in 2024

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.