Alert archive / Nebraska / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 430, NWS North Platte, NE

August 22, 2007Chase County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 22, 2007, 8:00 PM MDT for Chase County, Nebraska. It was in force for 33 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 22, 2007, 8:00 PM MDT (02:00 UTC)
Expired: Aug 22, 2007, 8:33 PM MDT
In force: 33 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Chase County, NE

The radar

The Goodland radar (KGLD), 132 km from the middle of the area, began a volume at 02:02 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, 2.0 hours before the alert went out and 114 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: 727 J/kg
Mixed-layer CIN: -285 J/kg
Mixed-layer LCL: 1523 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 325 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KLBF 230200
SVRLBF
NEC029-230245-
/O.NEW.KLBF.SV.W.0430.070823T0200Z-070823T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
800 PM MDT WED AUG 22 2007

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHASE COUNTY IN SOUTHWEST NEBRASKA...
  THIS INCLUDES THE CITY OF IMPERIAL...

* UNTIL 845 PM MDT

* AT 754 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 6 MILES WEST OF CHAMPION...OR ABOUT 10 MILES WEST
  OF IMPERIAL...AND MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  IMPERIAL BY 815 PM MDT...

LAT...LON 4069 10181 4069 10154 4064 10135 4046 10160
      4039 10172 4039 10185 4048 10203
TIME...MOT...LOC 0200Z 227DEG 22KT 4050 10179

$$

JMC

2 follow-up statements

000 
WWUS53 KLBF 230222
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
919 PM CDT WED AUG 22 2007

NEC029-230245-
/O.CON.KLBF.SV.W.0430.000000T0000Z-070823T0245Z/
CHASE NE-
819 PM MDT WED AUG 22 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM MDT
FOR CHASE COUNTY...

AT 814 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
 THE STRONGEST PART OF THIS STORM HAS REDEVELOPED NEAR HIGHWAY 6 
MILE MARKER 10...OR ABOUT 15 MILES WEST OF IMPERIAL...MOVING 
NORTHEAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  HIGHWAY 6 MILE MARKER 10 BY 825 PM MDT...

IMPERIAL CAN EXPECT LIGHT TO MODERATE RAIN AND POSSIBLY SOME PEA 
SIZE HAIL.

LAT...LON 4069 10181 4069 10154 4064 10135 4046 10160
      4039 10172 4039 10185 4048 10203
TIME...MOT...LOC 0219Z 223DEG 12KT 4052 10190

$$

JMC

000 
WWUS53 KLBF 230233
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
930 PM CDT WED AUG 22 2007

NEC029-230240-
/O.CAN.KLBF.SV.W.0430.000000T0000Z-070823T0245Z/
CHASE NE-
830 PM MDT WED AUG 22 2007

...THE SEVERE THUNDERSTORM WARNING FOR CHASE COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED...THEREFORE THE 
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

THE LARGEST HAIL REPORTED WITH THIS STORM WAS DIME SIZE.

SOME SMALL HAIL WILL BE POSSIBLE WITH THIS STORM ACROSS WESTERN 
CHASE COUNTY.

LAT...LON 4069 10181 4069 10154 4064 10135 4046 10160
      4039 10172 4039 10185 4048 10203
TIME...MOT...LOC 0230Z 223DEG 12KT 4055 10187

$$

JMC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 9:46 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	59 min
Aug 22, 10:42 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	63 min
Aug 22, 11:53 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Thomas	43 min
Aug 23, 12:22 AM MDT	Severe Thunderstorm Warning	LBF	Arthur, Garden, Grant	38 min
Aug 23, 12:38 AM MDT	Severe Thunderstorm Warning	LBF	Keith	39 min
Aug 23, 12:46 AM MDT	Severe Thunderstorm Warning	LBF	Hooker, McPherson	44 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2007 Every severe thunderstorm warning in 2007

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.