Alert archive / Nebraska / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 232, NWS North Platte, NE

August 24, 20174 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 24, 2017, 7:59 PM CDT for 4 counties in Nebraska. It was in force for 46 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
Aug 24, 2017, 7:59 PM CDT (00:59 UTC)
Expired
Aug 24, 2017, 8:45 PM CDT
In force
46 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Garfield County, NE, Holt County, NE, Loup County, NE, Rock County, NE

The radar

The North Platte radar (KLNX), 125 km from the middle of the area, began a volume at 01:03 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, 1.0 hours before the alert went out and 172 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2017-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1741 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2017-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1741 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
1673 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

856 
WUUS53 KLBF 250059
SVRLBF
NEC071-089-115-149-250145-
/O.NEW.KLBF.SV.W.0232.170825T0059Z-170825T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
759 PM CDT THU AUG 24 2017

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southeastern Rock County in north central Nebraska...
  Northeastern Loup County in north central Nebraska...
  Northwestern Garfield County in north central Nebraska...
  Southwestern Holt County in north central Nebraska...

* Until 845 PM CDT

* At 758 PM CDT, a severe thunderstorm was located 7 miles west of
  Amelia, or 28 miles southwest of O'neill, moving west 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...
  Amelia and Carson Lake. 

This includes Highway 183 near mile marker 161.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4221 9885 4195 9929 4227 9953 4235 9896
TIME...MOT...LOC 0058Z 068DEG 14KT 4224 9911 

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

CDC
2 follow-up statements
281 
WWUS53 KLBF 250117
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
817 PM CDT THU AUG 24 2017

NEC071-089-115-149-250145-
/O.CON.KLBF.SV.W.0232.000000T0000Z-170825T0145Z/
Rock NE-Loup NE-Garfield NE-Holt NE-
817 PM CDT THU AUG 24 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN ROCK...NORTHEASTERN LOUP...NORTHWESTERN GARFIELD AND
SOUTHWESTERN HOLT COUNTIES...

At 817 PM CDT, a severe thunderstorm was located 12 miles west of
Amelia, or 30 miles north of Burwell, moving west 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...
Carson Lake.

This includes Highway 183 near mile marker 161.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4213 9899 4195 9929 4227 9953 4233 9912
TIME...MOT...LOC 0117Z 068DEG 14KT 4221 9921 

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

CDC
792 
WWUS53 KLBF 250140
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
840 PM CDT THU AUG 24 2017

NEC071-089-115-149-250150-
/O.EXP.KLBF.SV.W.0232.000000T0000Z-170825T0145Z/
Rock NE-Loup NE-Garfield NE-Holt NE-
840 PM CDT THU AUG 24 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ROCK...
NORTHEASTERN LOUP...NORTHWESTERN GARFIELD AND SOUTHWESTERN HOLT
COUNTIES WILL EXPIRE AT 845 PM 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 small hail,
gusty winds and heavy rain are still possible with this thunderstorm.

LAT...LON 4213 9899 4195 9929 4227 9953 4233 9912
TIME...MOT...LOC 0140Z 068DEG 14KT 4218 9932 

$$

CDC

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 7:02 PM CDTSpecial Weather StatementLBFHolt43 min
Aug 24, 7:34 PM CDTSpecial Weather StatementLBFHolt41 min
Aug 24, 7:38 PM CDTSpecial Weather StatementLBFBlaine52 min
Aug 24, 8:26 PM CDTAreal Flood AdvisoryLBFBlaine, Brown, Holt, Loup, Rock2 hr
Aug 24, 8:32 PM CDTSpecial Weather StatementLBFLoup43 min
Aug 24, 8:42 PM CDTSpecial Weather StatementLBFLoup48 min
Aug 24, 9:17 PM CDTSpecial Weather StatementLBFBlaine, Loup43 min
Aug 24, 9:54 PM CDTSpecial Weather StatementLBFBlaine, Loup51 min
Aug 24, 9:56 PM CDTAreal Flood AdvisoryLBFBlaine, Loup2 hr
Aug 24, 10:43 PM CDTSpecial Weather StatementLBFBlaine, Loup47 min
Aug 24, 11:34 PM CDTSpecial Weather StatementLBFLoup41 min
Aug 25, 12:00 AM CDTAreal Flood AdvisoryLBFBlaine, Loup3 hr
Aug 25, 5:02 PM CDTSpecial Weather StatementLBFKeya Paha43 min
Aug 25, 5:38 PM CDTSpecial Weather StatementLBFCherry52 min
Aug 25, 5:40 PM CDTSpecial Weather StatementLBFKeya Paha50 min
Aug 25, 6:22 PM CDTSevere Thunderstorm WarningLBFKeya Paha38 min
Aug 25, 6:30 PM CDTSpecial Weather StatementLBFKeya Paha15 min
Aug 25, 6:36 PM CDTSpecial Weather StatementLBFChase39 min
Aug 25, 6:38 PM CDTSevere Thunderstorm WarningLBFKeya Paha22 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2017Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.