Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 23, NWS North Platte, NE

April 29, 2001Lincoln County, Logan County, McPherson County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Apr 29, 2001, 7:24 PM CDT for Lincoln County, Logan County, McPherson County, Nebraska. It was in force for 66 min. 5 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Apr 29, 2001, 7:24 PM CDT (00:24 UTC)
Expired: Apr 29, 2001, 8:30 PM CDT
In force: 66 min
Issued by: NWS North Platte, NE
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Lincoln County, NE, Logan County, NE, McPherson County, NE

The radar

The North Platte radar (KLNX), 57 km from the middle of the area, began a volume at 00:27 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
Apr 29, 7:25 PM CDT	Hail 0.75	Stapleton, NE
Apr 29, 7:31 PM CDT	Hail 0.75	Stapleton, NE
Apr 29, 7:31 PM CDT	Hail 0.75	North Platte, NE
Apr 29, 7:55 PM CDT	Hail 1	Tryon, NE
Apr 29, 8:00 PM CDT	Hail 0.75	Stapleton, NE

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.4 hours before the alert went out and 36 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: 913 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 2550 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLBF 300024
SVRLBF
NEC111-113-117-300130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
724 PM CDT SUN APR 29 2001

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MCPHERSON COUNTY IN WEST CENTRAL NEBRASKA
  SOUTHERN LOGAN COUNTY IN WEST CENTRAL NEBRASKA
  EXTREME NORTH CENTRAL LINCOLN COUNTY IN SOUTHWEST NEBRASKA

* UNTIL 830 PM CDT

* AT 722 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 11 MILES SOUTHWEST OF STAPLETON...MOVING
  NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...

  11 MILES SOUTHEAST OF RINGGOLD AROUND 730 PM CDT
  OVER STAPLETON AROUND 750 PM CDT
  2 MILES NORTHWEST OF GANDY AROUND 755 PM CDT

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER IN A SMALL
INTERIOR ROOM AWAY FROM WINDOWS. A BASEMENT OFFERS THE BEST
PROTECTION.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4133 10086 4134 10038 4162 10037 4162 10092
$$

TLK

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 29, 6:50 PM CDT, 34 minutes earlier.

Area forecast discussion, Apr 29, 6:50 PM CDT, 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
650 PM CDT SUN APR 29 2001

UPDATED ZONES TO REMOVE WIND ADVISORY...WHICH ACTUALLY EXPIRED. SFC
OBS AT ONL SHOW GUSTS TO 30 TO 35 KTS...AND SHOULD STAY UNDER THAT
FOR THE EVENING AS FRONT/TROF AXIS APPROACHES. OTHERWISE JUST
REMOVED BCMG WORDING IN REST OF ZONES FOR TSRA ONGOING.

.LBF...NONE

JWS

In the hours before

Local storm report, Apr 29, 5:14 PM CDT, 2 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE, NE
514 PM CDT SUN APR 29 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0445 PM    18 SE WHITMAN             NE   .75 INCH HAIL
04/29/01   GRANT                          REPORTED BY
SPOTTERS

Local storm report, Apr 29, 6:23 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT...CORRECTED FORMAT ERROR
NATIONAL WEATHER SERVICE NORTH PLATTE, NE
623 PM CDT SUN APR 29 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0445 PM    18 SE WHITMAN             NE   .75 INCH HAIL
04/29/01   GRANT                          REPORTED BY SPOTTERS

0554 PM    9 NNE HAYES CENTER        NE   .75 INCH HAIL
04/29/01   HAYES                          REPORTED BY SPOTTERS

0600 PM    7 WSW WELLFLEET           NE   .75 INCH HAIL
04/29/01   LINCOLN                        REPORTED BY SPOTTERS

MTM

Local storm report, Apr 29, 7:05 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE, NE
705 PM CDT SUN APR 29 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0700 PM    6 N WELLFLEET             NE   .88 INCH HAIL
04/29/01   LINCOLN                        REPORTED BY SPOTTERS

Local storm report, Apr 29, 7:12 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE, NE
712 PM CDT SUN APR 29 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0645 PM    14 NNW NORTH PLATTE       NE   .75 INCH HAIL
04/29/01   LINCOLN                        REPORTED BY SPOTTERS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 7:52 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Thomas	53 min
Apr 29, 8:24 PM CDT	Severe Thunderstorm Warning	LBF	Logan, McPherson	66 min
Apr 29, 8:55 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Rock	65 min
Apr 29, 9:25 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Keya Paha	65 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.