Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 102, NWS North Platte, NE

July 29, 2021Keith County, Lincoln County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 29, 2021, 6:20 PM MDT for Keith County, Lincoln County, Nebraska. It was in force for 40 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: Jul 29, 2021, 6:20 PM MDT (00:20 UTC)
Expired: Jul 29, 2021, 7:00 PM MDT
In force: 40 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Keith County, NE, Lincoln County, NE

The radar

The North Platte radar (KLNX), 106 km from the middle of the area, began a volume at 00:21 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 nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.3 hours before the alert went out and 47 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: 3541 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1551 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 12.7

Open this sounding in Storm Lab

The text

As transmitted.

630 
WUUS53 KLBF 300020
SVRLBF
NEC101-111-300100-
/O.NEW.KLBF.SV.W.0102.210730T0020Z-210730T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
720 PM CDT Thu Jul 29 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Eastern Keith County in southwestern Nebraska...
  Northwestern Lincoln County in southwestern Nebraska...

* Until 800 PM CDT/700 PM MDT/.

* At 720 PM CDT/620 PM MDT/, a severe thunderstorm was located near
  Sutherland Reservoir State Recreation Area, or 21 miles west of
  North Platte, moving northwest at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Sutherland, Hershey, Paxton, Sutherland Reservoir State Recreation
  Area, Sarben, Big Bald Hill, Coker, O'Fallons and Nevens.

This includes Interstate 80 in Nebraska between mile markers 143 and
165.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

If on or near Sutherland Reservoir, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4095 10098 4104 10138 4132 10149 4132 10099
TIME...MOT...LOC 0020Z 146DEG 13KT 4107 10118 

HAIL...1.00IN
WIND...60MPH
 
$$

Snively

2 follow-up statements

448 
WWUS53 KLBF 300040
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
740 PM CDT Thu Jul 29 2021

NEC101-111-300100-
/O.CON.KLBF.SV.W.0102.000000T0000Z-210730T0100Z/
Keith NE-Lincoln NE-
740 PM CDT Thu Jul 29 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM
CDT/700 PM MDT/ FOR EASTERN KEITH AND NORTHWESTERN LINCOLN
COUNTIES...

At 740 PM CDT/640 PM MDT/, a severe thunderstorm was located near
Sutherland Reservoir State Recreation Area, or 22 miles west of North
Platte, moving northwest at 10 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Sutherland, Hershey, Paxton, Sutherland Reservoir State Recreation
Area, Sarben, Big Bald Hill, Coker, O'Fallons and Nevens.

This includes Interstate 80 in Nebraska between mile markers 143 and
165.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

If on or near Sutherland Reservoir, get away from the water and move 
indoors or inside a vehicle. remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4095 10098 4104 10138 4132 10149 4132 10099
TIME...MOT...LOC 0040Z 142DEG 8KT 4109 10121 

HAIL...0.75IN
WIND...60MPH
 
$$

Snively

334 
WWUS53 KLBF 300050
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
750 PM CDT Thu Jul 29 2021

NEC101-111-300100-
/O.EXP.KLBF.SV.W.0102.000000T0000Z-210730T0100Z/
Keith NE-Lincoln NE-
750 PM CDT Thu Jul 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KEITH AND NORTHWESTERN
LINCOLN COUNTIES WILL EXPIRE AT 800 PM CDT/700 PM MDT/...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 4095 10098 4104 10138 4132 10149 4132 10099
TIME...MOT...LOC 0050Z 146DEG 13KT 4112 10123 

$$

Snively

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 6:03 PM MDT	Special Weather Statement	LBF	Lincoln	42 min
Jul 30, 4:40 PM MDT	Special Weather Statement	LBF	Logan	50 min
Jul 30, 4:58 PM MDT	Special Weather Statement	LBF	Thomas	47 min
Jul 30, 5:05 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Logan, Thomas	40 min
Jul 30, 5:32 PM MDT	Severe Thunderstorm Warning	LBF	Logan, McPherson, Thomas	43 min
Jul 30, 5:46 PM MDT	Special Weather Statement	LBF	Garden	29 min
Jul 30, 5:47 PM MDT	Special Weather Statement	LBF	Logan	43 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2021 Every severe thunderstorm warning in 2021

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.