Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 135, NWS North Platte, NE

August 19, 2021Arthur County, Garden County, Keith County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 19, 2021, 4:35 PM MDT for Arthur County, Garden County, Keith County, Nebraska. It was in force for 40 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: Aug 19, 2021, 4:35 PM MDT (22:35 UTC)
Expired: Aug 19, 2021, 5:15 PM MDT
In force: 40 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Arthur County, NE, Garden County, NE, Keith County, NE

The radar

The North Platte radar (KLNX), 139 km from the middle of the area, began a volume at 22:39 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
Aug 19, 4:48 PM MDT	TSTM WND GST 60	9 Wnw Lemoyne, NE

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

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 19, 1:14 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.6 hours before the alert went out and 120 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: 541 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 810 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

481 
WUUS53 KLBF 192235
SVRLBF
NEC005-069-101-192315-
/O.NEW.KLBF.SV.W.0135.210819T2235Z-210819T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
435 PM MDT Thu Aug 19 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southwestern Arthur County in west central Nebraska...
  Northwestern Keith County in southwestern Nebraska...
  Southeastern Garden County in the Panhandle of Nebraska...

* Until 515 PM MDT.

* At 434 PM MDT, a severe thunderstorm was located near Lewellen, or
  16 miles southeast of Oshkosh, moving northeast at 40 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Arthur, Lewellen, Eagle Gulch Campground, Ruthon, Haythorn Lake,
  Clear Creek State Wildlife Management Area, McKeag, Otter Creek
  Campground, Ash Hollow State Historical Park, Jensen Lake, Belmar,
  Bourquim Hill, Velma and Windlass Hill.

This includes the following highways...
 Highway 61 between mile markers 107 and 128.
 Highway 92 between mile markers 115 and 131, and between mile
markers 165 and 167.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Lake McConaughy, 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 4129 10224 4172 10194 4153 10146 4116 10200
      4119 10206 4122 10206 4122 10211
TIME...MOT...LOC 2234Z 216DEG 33KT 4131 10206 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Taylor

2 follow-up statements

351 
WWUS53 KLBF 192250
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
450 PM MDT Thu Aug 19 2021

NEC005-069-101-192315-
/O.CON.KLBF.SV.W.0135.000000T0000Z-210819T2315Z/
Arthur NE-Keith NE-Garden NE-
450 PM MDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR SOUTHWESTERN ARTHUR...NORTHWESTERN KEITH AND SOUTHEASTERN GARDEN
COUNTIES...

At 450 PM MDT, a severe thunderstorm was located near Lemoyne, or 17
miles northwest of Ogallala, moving northeast at 25 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Arthur, Lewellen, Eagle Gulch Campground, Ruthon, Haythorn Lake,
Clear Creek State Wildlife Management Area, McKeag, Otter Creek
Campground, Ash Hollow State Historical Park, Jensen Lake, Belmar,
Bourquim Hill, Velma and Windlass Hill.

This includes the following highways...
 Highway 61 between mile markers 107 and 128.
 Highway 92 between mile markers 115 and 131, and between mile
markers 165 and 167.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Lake McConaughy, 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 4129 10224 4172 10194 4153 10146 4116 10200
      4119 10206 4122 10206 4122 10211
TIME...MOT...LOC 2250Z 221DEG 21KT 4136 10189 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Taylor

124 
WWUS53 KLBF 192254
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
454 PM MDT Thu Aug 19 2021

NEC005-069-101-192315-
/O.CON.KLBF.SV.W.0135.000000T0000Z-210819T2315Z/
Arthur NE-Keith NE-Garden NE-
454 PM MDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR SOUTHWESTERN ARTHUR...NORTHWESTERN KEITH AND SOUTHEASTERN GARDEN
COUNTIES...

At 454 PM MDT, a severe thunderstorm was located 7 miles northwest of
Lemoyne, or 16 miles southwest of Arthur, moving northeast at 40 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Arthur, Lewellen, Eagle Gulch Campground, Ruthon, Haythorn Lake,
Clear Creek State Wildlife Management Area, McKeag, Otter Creek
Campground, Ash Hollow State Historical Park, Jensen Lake, Belmar,
Bourquim Hill, Velma and Windlass Hill.

This includes the following highways...
 Highway 61 between mile markers 107 and 128.
 Highway 92 between mile markers 115 and 131, and between mile
markers 165 and 167.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4129 10224 4172 10194 4153 10146 4116 10200
      4119 10206 4122 10206 4122 10211
TIME...MOT...LOC 2254Z 216DEG 33KT 4137 10188 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Taylor

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 3:00 PM MDT	Special Weather Statement	LBF	Deuel	45 min
Aug 19, 3:13 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	47 min
Aug 19, 3:22 PM MDT	Special Weather Statement	LBF	Sheridan	38 min
Aug 19, 4:01 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	44 min
Aug 19, 4:02 PM MDT	Areal Flood Advisory	LBF	Deuel	3 hr
Aug 19, 4:48 PM MDT	Areal Flood Advisory	LBF	Garden	3 hr
Aug 19, 4:48 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	27 min
Aug 19, 4:50 PM MDT	Special Weather Statement	LBF	Garden	40 min
Aug 19, 5:00 PM MDT	Special Weather Statement	LBF	Perkins	45 min
Aug 19, 5:10 PM MDT	Tornado Warning	LBF	Chase, Perkins	50 min
Aug 19, 5:17 PM MDT	Severe Thunderstorm Warning	LBF	Keith	43 min
Aug 19, 5:19 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Arthur	41 min
Aug 19, 5:23 PM MDT	Special Weather Statement	LBF	Grant	52 min
Aug 19, 5:44 PM MDT	Areal Flood Advisory	LBF	Keith	3 hr
Aug 19, 5:59 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith, Lincoln, McPherson	46 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.