Alert archive / Nebraska / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 13, NWS North Platte, NE

April 23, 2008Keya Paha County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 23, 2008, 7:13 PM CDT for Keya Paha County, Nebraska. It was in force for 32 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: Apr 23, 2008, 7:13 PM CDT (00:13 UTC)
Expired: Apr 23, 2008, 7:45 PM CDT
In force: 32 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

County Keya Paha County, NE

The radar

The North Platte radar (KLNX), 118 km from the middle of the area, began a volume at 00:17 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
Apr 23, 7:27 PM CDT	HAIL 1	7 Nw Springview, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 23, 5:58 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.2 hours before the alert went out and 204 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: 539 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLBF 240014
SVRLBF
NEC103-240100-
/O.NEW.KLBF.SV.W.0013.080424T0013Z-080424T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
713 PM CDT WED APR 23 2008

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN KEYA PAHA COUNTY IN NORTH CENTRAL NEBRASKA...
  THIS INCLUDES THE CITY OF SPRINGVIEW...

* UNTIL 800 PM CDT

* AT 712 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE.  THIS STORM WAS LOCATED 8 MILES SOUTHWEST OF
  SPRINGVIEW...AND MOVING NORTHEAST AT 38 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SPRINGVIEW BY 720 PM CDT...

HAIL UP TO THE SIZE OF GOLF BALLS HAVE BEEN REPORTED IN NORTH BROWN 
COUNTY WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE 
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR NORTH CENTRAL NEBRASKA.

LAT...LON 4299 9993 4299 9957 4274 9978 4276 9987
      4278 10000
TIME...MOT...LOC 0013Z 204DEG 33KT 4278 9987

$$

13

2 follow-up statements

000 
WWUS53 KLBF 240034
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
734 PM CDT WED APR 23 2008

NEC103-240100-
/O.CON.KLBF.SV.W.0013.000000T0000Z-080424T0100Z/
KEYA PAHA NE-
734 PM CDT WED APR 23 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR WESTERN KEYA PAHA COUNTY...

AT 729 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR HIGHWAY 183 MILE MARKER 220...OR
10 MILES NORTHWEST OF SPRINGVIEW...MOVING NORTH AT 35 MPH.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. 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.

HAIL UP TO ONE INCHES IN DIAMETER HAS RECENTLY BEEN REPORTED 7 MILES 
NORTHWEST OF SPRINGVIEW WITH THIS STORM. IF YOU ARE IN THE PATH OF 
THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR NORTH CENTRAL NEBRASKA.

LAT...LON 4299 9993 4299 9957 4274 9978 4276 9987
      4278 10000
TIME...MOT...LOC 0034Z 191DEG 38KT 4301 9982

$$

13

000 
WWUS53 KLBF 240045
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
744 PM CDT WED APR 23 2008

NEC103-240054-
/O.CAN.KLBF.SV.W.0013.000000T0000Z-080424T0100Z/
KEYA PAHA NE-
744 PM CDT WED APR 23 2008

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN KEYA PAHA COUNTY IS
CANCELLED...

THE STORM WHICH HAD PROMPTED THE WARNING HAS MOVED NORTH OF KEYA 
PAHA COUNTY AND NO LONGER POSED A SEVERE WEATHER THREAT. ADDITIONAL 
THUNDERSTORMS WILL BE POSSIBLE THROUGH THE OVERNIGHT HOURS...HOWEVER 
THE TORNADO THREAT SHOULD DIMINISH OVER THE NEXT FEW HOURS. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR NORTH CENTRAL NEBRASKA.

LAT...LON 4299 9993 4299 9957 4274 9978 4276 9987
      4278 10000
TIME...MOT...LOC 0044Z 191DEG 38KT 4311 9979

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 6:54 PM CDT	Severe Thunderstorm Warning	LBF	Keith, Perkins	51 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2008 Every severe thunderstorm warning in 2008

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.