Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 173, NWS North Platte, NE

September 5, 2021Arthur County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Sep 5, 2021, 3:18 AM MDT for Arthur County, Nebraska. It was in force for 42 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: Sep 5, 2021, 3:18 AM MDT (09:18 UTC)
Expired: Sep 5, 2021, 4:00 AM MDT
In force: 42 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Arthur County, NE

The radar

The North Platte radar (KLNX), 102 km from the middle of the area, began a volume at 09:19 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
Sep 5, 3:30 AM MDT	HAIL 1	Arthur, NE	DELAYED REPORT. TIME ESTIMATED FROM RADAR

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 00:00Z, 9.3 hours before the alert went out and 98 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: 724 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1466 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

227 
WUUS53 KLBF 050918
SVRLBF
NEC005-051000-
/O.NEW.KLBF.SV.W.0173.210905T0918Z-210905T1000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
318 AM MDT Sun Sep 5 2021

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southeastern Arthur County in west central Nebraska...

* Until 400 AM MDT.

* At 317 AM MDT, a severe thunderstorm was located near Arthur,
  moving southeast at 20 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Arthur, Haythorn Lake, Bucktail and Bucktail Lake. 

This includes the following highways...
 Highway 61 between mile markers 115 and 129.
 Highway 92 between mile markers 165 and 172.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4154 10184 4166 10175 4157 10142 4140 10141
      4140 10163
TIME...MOT...LOC 0917Z 301DEG 17KT 4156 10175 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Roberg

2 follow-up statements

110 
WWUS53 KLBF 050939
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
339 AM MDT Sun Sep 5 2021

NEC005-051000-
/O.CON.KLBF.SV.W.0173.000000T0000Z-210905T1000Z/
Arthur NE-
339 AM MDT Sun Sep 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM MDT
FOR SOUTHEASTERN ARTHUR COUNTY...

At 339 AM MDT, a severe thunderstorm was located near Arthur, moving
southeast at 30 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Arthur, Bucktail Lake and Bucktail. 

This includes the following highways...
 Highway 61 between mile markers 117 and 129.
 Highway 92 between mile markers 165 and 172.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4148 10173 4166 10175 4157 10142 4140 10141
      4140 10163
TIME...MOT...LOC 0939Z 311DEG 26KT 4150 10163 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Roberg

418 
WWUS53 KLBF 050958
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
358 AM MDT Sun Sep 5 2021

NEC005-051008-
/O.EXP.KLBF.SV.W.0173.000000T0000Z-210905T1000Z/
Arthur NE-
358 AM MDT Sun Sep 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ARTHUR COUNTY
WILL EXPIRE AT 400 AM 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 small hail
and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
North Platte.

LAT...LON 4148 10173 4166 10175 4157 10142 4140 10141
      4140 10163
TIME...MOT...LOC 0958Z 301DEG 17KT 4146 10153 

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 8:35 PM MDT	Special Weather Statement	LBF	Custer	40 min
Sep 5, 12:10 AM MDT	Special Weather Statement	LBF	Loup	50 min
Sep 5, 12:52 AM MDT	Special Weather Statement	LBF	Garfield	38 min
Sep 5, 1:26 AM MDT	Special Weather Statement	LBF	Keith	49 min
Sep 5, 1:39 AM MDT	Special Weather Statement	LBF	Garfield	51 min
Sep 5, 2:13 AM MDT	Special Weather Statement	LBF	Keith	47 min
Sep 5, 2:26 AM MDT	Special Weather Statement	LBF	Arthur	49 min
Sep 5, 2:38 AM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith	37 min
Sep 5, 3:07 AM MDT	Special Weather Statement	LBF	Keith	38 min
Sep 5, 3:22 AM MDT	Special Weather Statement	LBF	Keith	38 min
Sep 5, 3:56 AM MDT	Special Weather Statement	LBF	Lincoln	49 min
Sep 5, 4:01 AM MDT	Special Weather Statement	LBF	Arthur	44 min
Sep 5, 4:37 AM MDT	Special Weather Statement	LBF	Lincoln	38 min
Sep 5, 5:25 AM MDT	Special Weather Statement	LBF	Frontier	50 min
Sep 5, 6:00 AM MDT	Special Weather Statement	LBF	Frontier	45 min
Sep 5, 6:33 AM MDT	Special Weather Statement	LBF	Holt	42 min
Sep 5, 6:36 AM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Holt	39 min
Sep 5, 7:14 AM MDT	Special Weather Statement	LBF	Blaine	46 min
Sep 5, 7:16 AM MDT	Special Weather Statement	LBF	Holt	44 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.