Alert archive / Nebraska / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 239, NWS North Platte, NE

August 27, 2017Blaine County, Custer County, Loup County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 27, 2017, 1:36 AM CDT for Blaine County, Custer County, Loup County, Nebraska. It was in force for 54 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 27, 2017, 1:36 AM CDT (06:36 UTC)
Expired: Aug 27, 2017, 2:30 AM CDT
In force: 54 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Blaine County, NE, Custer County, NE, Loup County, NE

The radar

The North Platte radar (KLNX), 70 km from the middle of the area, began a volume at 06:35 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 27, 1:54 AM CDT	TSTM WND GST 60	7 Nw Gates, NE

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, 6.6 hours before the alert went out and 99 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: 557 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 2379 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

603 
WUUS53 KLBF 270636
SVRLBF
NEC009-041-115-270730-
/O.NEW.KLBF.SV.W.0239.170827T0636Z-170827T0730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
136 AM CDT SUN AUG 27 2017

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southwestern Loup County in north central Nebraska...
  North central Custer County in central Nebraska...
  Southeastern Blaine County in north central Nebraska...

* Until 230 AM CDT

* At 136 AM CDT, a severe thunderstorm was located near Brewster,
  moving south at 30 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees. 

* Locations impacted include...
  Anselmo, Victoria Springs State Recreation Area, Lillian, Milburn,
  Milburn Diversion Dam State Wildlife Management Area, Round Valley,
  Walworth and Gates.

This includes Highway 2 between mile markers 257 and 266.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4191 9990 4195 9970 4156 9949 4150 9988
TIME...MOT...LOC 0636Z 345DEG 26KT 4186 9979 

HAIL...1.75IN
WIND...60MPH
 
$$

Roberg

3 follow-up statements

831 
WWUS53 KLBF 270653
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
153 AM CDT SUN AUG 27 2017

NEC009-041-115-270730-
/O.CON.KLBF.SV.W.0239.000000T0000Z-170827T0730Z/
Loup NE-Custer NE-Blaine NE-
153 AM CDT SUN AUG 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR SOUTHWESTERN LOUP...NORTH CENTRAL CUSTER AND SOUTHEASTERN BLAINE
COUNTIES...

At 151 AM CDT, a severe thunderstorm was located near Victoria
Springs State Recreation Area, or 17 miles southeast of Brewster,
moving south at 35 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Anselmo, Victoria Springs State Recreation Area, Lillian, Milburn,
Milburn Diversion Dam State Wildlife Management Area, Round Valley,
Walworth and Gates.

This includes Highway 2 between mile markers 257 and 266.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4191 9990 4195 9970 4156 9949 4150 9988
TIME...MOT...LOC 0651Z 342DEG 32KT 4171 9973 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

Roberg

084 
WWUS53 KLBF 270704
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
204 AM CDT SUN AUG 27 2017

NEC009-041-115-270730-
/O.CON.KLBF.SV.W.0239.000000T0000Z-170827T0730Z/
Loup NE-Custer NE-Blaine NE-
204 AM CDT SUN AUG 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR SOUTHWESTERN LOUP...NORTH CENTRAL CUSTER AND SOUTHEASTERN BLAINE
COUNTIES...

At 204 AM CDT, a severe thunderstorm was located near Victoria
Springs State Recreation Area, or 15 miles north of Broken Bow,
moving south at 30 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Anselmo, Victoria Springs State Recreation Area, Lillian, Milburn,
Milburn Diversion Dam State Wildlife Management Area, Round Valley,
Walworth and Gates.

This includes Highway 2 between mile markers 257 and 266.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4191 9990 4195 9970 4156 9949 4150 9988
TIME...MOT...LOC 0704Z 345DEG 24KT 4163 9970 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

Roberg

305 
WWUS53 KLBF 270726
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
226 AM CDT SUN AUG 27 2017

NEC009-041-115-270736-
/O.EXP.KLBF.SV.W.0239.000000T0000Z-170827T0730Z/
Loup NE-Custer NE-Blaine NE-
226 AM CDT SUN AUG 27 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LOUP...NORTH
CENTRAL CUSTER AND SOUTHEASTERN BLAINE COUNTIES WILL EXPIRE AT 230 AM
CDT...
                
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
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 4191 9990 4195 9970 4156 9949 4150 9988
TIME...MOT...LOC 0726Z 345DEG 26KT 4149 9965 

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 7:01 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Hooker	44 min
Aug 26, 7:17 PM CDT	Severe Thunderstorm Warning	LBF	Garden, Sheridan	29 min
Aug 26, 8:51 PM CDT	Special Weather Statement	LBF	Keya Paha	39 min
Aug 26, 10:50 PM CDT	Special Weather Statement	LBF	Keya Paha	55 min
Aug 26, 11:41 PM CDT	Special Weather Statement	LBF	Brown	49 min
Aug 27, 12:30 AM CDT	Special Weather Statement	LBF	Cherry	45 min
Aug 27, 12:36 AM CDT	Special Weather Statement	LBF	Brown	39 min
Aug 27, 12:57 AM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown	48 min
Aug 27, 1:11 AM CDT	Special Weather Statement	LBF	Cherry	49 min
Aug 27, 1:46 AM CDT	Special Weather Statement	LBF	Hooker, Thomas	44 min
Aug 27, 2:01 AM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Hooker, Logan, McPherson, Thomas	44 min
Aug 27, 3:23 AM CDT	Special Weather Statement	LBF	Custer	52 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2017 Every severe thunderstorm warning in 2017

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.