Alert archive / Nebraska / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 252, NWS North Platte, NE

June 21, 2007Sheridan County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 21, 2007, 8:02 PM MDT for Sheridan County, Nebraska. It was in force for 28 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: Jun 21, 2007, 8:02 PM MDT (02:02 UTC)
Expired: Jun 21, 2007, 8:30 PM MDT
In force: 28 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Sheridan County, NE

The radar

The North Platte radar (KLNX), 141 km from the middle of the area, began a volume at 02:03 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 21, 3:37 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.0 hours before the alert went out and 180 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: 3305 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1841 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 332 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLBF 220202
SVRLBF
NEC161-220230-
/O.NEW.KLBF.SV.W.0252.070622T0202Z-070622T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
802 PM MDT THU JUN 21 2007

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN SHERIDAN COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 830 PM MDT

* AT 758 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR KENNEDY LAKE...OR ABOUT 37 MILES EAST OF
  ALLIANCE...AND MOVING SOUTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT THURSDAY EVENING
FOR WESTERN NEBRASKA.

LAT...LON 4226 10239 4204 10242 4200 10204 4226 10207

$$

13

2 follow-up statements

000 
WWUS53 KLBF 220217
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
917 PM CDT THU JUN 21 2007

NEC161-220230-
/O.CON.KLBF.SV.W.0252.000000T0000Z-070622T0230Z/
SHERIDAN NE-
817 PM MDT THU JUN 21 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM MDT
FOR SOUTHEASTERN SHERIDAN COUNTY...

AT 812 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR BINGHAM...OR ABOUT 37 MILES NORTHWEST OF ARTHUR...MOVING
SOUTHEAST AT 40 MPH.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT THURSDAY EVENING
FOR WESTERN NEBRASKA.

LAT...LON 4226 10239 4204 10242 4200 10204 4226 10207

$$

13

000 
WWUS53 KLBF 220227
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
927 PM CDT THU JUN 21 2007

NEC089-149-220300-
/O.CON.KLBF.SV.W.0251.000000T0000Z-070622T0300Z/
ROCK NE-HOLT NE-
927 PM CDT THU JUN 21 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHERN HOLT AND NORTHERN ROCK COUNTIES...

AT 922 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTHWEST OF HIGHWAY
281 MILE MARKER 170 TO 7 MILES SOUTHWEST OF HIGHWAY 11 MILE MARKER
140 TO PONY LAKE...OR ALONG A LINE EXTENDING FROM 9 MILES SOUTHWEST
OF ONEILL TO 22 MILES SOUTHWEST OF ONEILL TO 19 MILES SOUTHEAST OF
BASSETT...MOVING SOUTHEAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  BROWN LAKE BY 935 PM CDT...
  HIGHWAY 281 MILE MARKER 170 BY 950 PM CDT...
  AMELIA...CHAMBERS...6 MILES NORTH OF SWAN LAKE AND 9 MILES NORTH OF
  GOOSE LAKE STATE WILDLIFE MANAGEMENT AREA BY 1000 PM CDT...

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FRIDAY MORNING
FOR WESTERN NEBRASKA.

LAT...LON 4244 9883 4241 9922 4262 9964 4210 9919
      4208 9829

$$

ADO/JRS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 6:22 PM MDT	Severe Thunderstorm Warning	LBF	Custer	53 min
Jun 21, 6:28 PM MDT	Tornado Warning	LBF	Rock	32 min
Jun 21, 6:46 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	59 min
Jun 21, 6:57 PM MDT	Severe Thunderstorm Warning	LBF	Holt, Rock	63 min
Jun 21, 7:04 PM MDT	Tornado Warning	LBF	Cherry	56 min
Jun 21, 7:07 PM MDT	Tornado Warning	LBF	Holt, Rock	23 min
Jun 21, 7:15 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	30 min
Jun 21, 7:22 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	38 min
Jun 21, 7:24 PM MDT	Tornado Warning	LBF	Cherry	51 min
Jun 21, 7:26 PM MDT	Tornado Warning	LBF	Holt, Rock	34 min
Jun 21, 7:28 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	32 min
Jun 21, 7:51 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	24 min
Jun 21, 7:52 PM MDT	Severe Thunderstorm Warning	LBF	Garden, Grant	38 min
Jun 21, 7:59 PM MDT	Severe Thunderstorm Warning	LBF	Holt, Rock	61 min
Jun 21, 8:00 PM MDT	Tornado Warning	LBF	Cherry	43 min
Jun 21, 8:15 PM MDT	Severe Thunderstorm Warning	LBF	Keya Paha, Rock	42 min
Jun 21, 8:20 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	25 min
Jun 21, 8:30 PM MDT	Severe Thunderstorm Warning	LBF	Grant, Hooker	45 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.