Alert archive / Nebraska / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 202, NWS North Platte, NE

July 7, 2003Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 7, 2003, 11:51 PM CDT for Custer County, Nebraska. It was in force for 39 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: Jul 7, 2003, 11:51 PM CDT (04:51 UTC)
Expired: Jul 8, 2003, 12:30 AM CDT
In force: 39 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Custer County, NE

The radar

The North Platte radar (KLNX), 111 km from the middle of the area, began a volume at 04:51 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 7, 10:20 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.9 hours before the alert went out and 105 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: 3731 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1235 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 17.1

Open this sounding in Storm Lab

The text

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

847 
WUUS53 KLBF 080451
SVRLBF
NEC041-080530-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1151 PM CDT MON JUL 7 2003

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CUSTER COUNTY IN CENTRAL NEBRASKA

* UNTIL 1230 AM CDT

* AT 1146 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE MOST DANGEROUS PART OF A SEVERE THUNDERSTORM ALONG A LINE
  EXTENDING FROM 22 MILES WEST OF SARGENT TO 4 MILES SOUTH OF
  WEISSERT TO 11 MILES SOUTHWEST OF MASON CITY...OR ABOUT ALONG A
  LINE EXTENDING FROM 4 MILES SOUTHWEST OF MILBURN TO 4 MILES SOUTH
  OF WEISSERT TO 11 MILES SOUTHWEST OF MASON CITY...MOVING EAST AT 35
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  OVER MASON CITY AROUND MIDNIGHT CDT
  OVER SARGENT AROUND 1210 AM CDT
  OVER COMSTOCK AROUND 1215 AM 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT
TUESDAY MORNING FOR WESTERN NEBRASKA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 500 AM CDT TUESDAY MORNING FOR WESTERN
NEBRASKA.

LAT...LON 4172 9954 4105 9955 4107 9922 4172 9925

$$
POWER

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 Jul 7, 3:55 PM CDT, 7 hours 56 minutes earlier.

Area forecast discussion, Jul 7, 3:55 PM CDT, 7 hours 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
355 PM CDT MON JUL 7 2003

PCPN CHANCES THIS EVENING/TONIGHT MAIN FCST CHALLENGE.

ANOTHER BUSY NIGHT AS MCS CONTINUING TO MOVE ACROSS EASTERN CWA
EARLY THIS MORNING. ATMOSPHERE WILL TRY TO RELOAD TODAY WITH NEXT
STRONG VORT SEEN IN WATER VAPOR ACROSS OR/ID. THIS FEATURE WILL BE
ACCOMPANIED BY JET MAX ALSO MOVING ACROSS PAC NW. PRIOR TO LARGE
MCS...SFC LOW WAS IN SE COLORADO WITH WARM FRONT ARCHING ACROSS NW
INTO SOUTHERN NEB.

CYCLOGENESIS SHOULD CONTINUE ACROSS NW HIGH PLAINS AS WESTERN VORT
ADVANCES TODAY. THIS WILL ALLOW SOUTHERLY FLOW TO INCREASE ACROSS
THE PLAINS TODAY WITH WARM FRONT MOST LIKELY LIFTING INTO NORTHERN
PORTIONS OF THE STATE AS SFC LOW MOVES INTO BLACK HILLS REGION.
STRONG WAA AND THETA-E ADVECTION AHEAD OF THE FRONT WILL OCCURE
ACROSS N/E PORTIONS OF FA. THIS COMBINED WITH STRONG SHEAR AHEAD OF
WAVE...SB CAPES 3000+...AND UPPER JET INTERACTION SHOULD LEAD TO
ANOTHER SVR WEATHER OUTBREAK. WILL PUT BEST POPS N.EAST TAPERING TO
SLGHT CHANCE FAR SW WHERE SOUNDINGS LESS IMPRESSIVE WITH WARM/DRY
AIR WORKING IN ALOFT. HOWEVER WILL BE STRONG CONVERGENCE ALONG SFC
TROF/DRYLINE AND FROPA LATER IN EVENING. Q-VECTS SHOWING STRONG
SUBSIDENCE PUSHING IN BEHIND WAVE WITH PCPN ENDING W/E THROUGH BY
SUNRISE WITH FROPA THROUGH CWA.

ONLY MINOR CHANGES TO REMAINDER OF FCST.

.LBF...NONE.

DP

Hazardous weather outlook, Jul 7, 10:19 PM CDT, 1 hour 32 minutes before

NEZ004>010-022>029-035>038-056>059-069>071-094-081100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1019 PM CDT MON JUL 7 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND NORTH CENTRAL
NEBRASKA.

.DAY ONE...TONIGHT

...SEVERE THUNDERSTORM WATCH FOR SOUTHWEST AND WEST CENTRAL NEBRASKA
UNTIL MIDNIGHT CDT (11 PM MDT)...
...SEVERE THUNDERSTORM WATCH FOR THE EASTERN HALF OF NORTH CENTRAL
NEBRASKA AND CUSTER COUNTY OF CENTRAL NEBRASKA UNTIL 5 AM CDT...

SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS EVENING FOR AREAS EAST OF
A LINE FROM ARTHUR TO HAYES CENTER. THE PRIMARY THREAT WILL BE
DAMAGING WINDS WITH WIND SPEED IN EXCESS OF 80 MPH POSSIBLE. THE
STORMS IN SOUTHWEST NEBRASKA HAVE HAD A HISTORY OF THESE WIND SPEEDS
WITH DAMAGE TO TREES AND PROPERTY AND POWER OUTAGES. THIS WEATHER
SYSTEM WILL LIKELY TRACK EAST OVERNIGHT WITH A CONTINUE THREAT OF
DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SHOWERS AND THUNDERSTORMS WILL REMAIN IN THE FORECAST THROUGH MID
WEEK AS NUMEROUS UPPER LEVEL DISTURBANCES WILL BE TRAVELING OVER THE
CENTRAL PLAINS IN WEST TO NORTHWEST FLOW ALOFT.  THE CHANCE OF
THUNDERSTORMS WILL CONTINUE TUESDAY OR WEDNESDAY BUT THE HIGHEST
LIKELY HOOD OF SEVERE WEATHER IS TONIGHT AND TUESDAY.

THUNDERSTORMS ARE NOT EXPECTED THURSDAY THROUGH SUNDAY AS HIGH
PRESSURE BUILDS INTO THE CENTRAL PLAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

KAR

In the hours before

Local storm report, Jul 7, 10:23 PM CDT, 1 hour 28 minutes before

PRELIMINARY LOCAL STORM REPORT : CORRECTION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1023 PM CDT MON JUL 07 2003

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

1019 PM    4 S NORTH PLATTE          NE   80 MPH WIND GUST
07/07/03   LINCOLN

1008 PM    4 W SUTHERLAND            NE   70 MPH WIND GUST
07/07/03   LINCOLN

0950 PM    4 E GRANT                 NE   70 MPH TSTORM WIND
07/07/03   PERKINS

0945 PM    CHAMPION                  NE   60 MPH TSTORM WIND
07/07/03   CHASE

0940 PM    OGALLALA                  NE   58 MPH TSTORM WIND
07/07/03   KEITH

0935 PM    BRULE                     NE   60 MPH TSTORM WIND
07/07/03   KEITH

0920 PM    LEWELLEN                  NE   60 MPH TSTORM WIND
07/07/03   GARDEN

0906 PM    BIG SPRINGS               NE   80 MPH TSTORM WIND
07/07/03   DEUEL

RLB

Local storm report, Jul 7, 10:38 PM CDT, 1 hour 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1038 PM CDT MON JUL 07 2003

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

1030 PM    NORTH PLATTE              NE   64 MPH WIND GUST
07/07/03   LINCOLN                        SUSTAINED WINDS AT 55 MPH
                                          NWS NORTH PLATTE

RLB

Local storm report, Jul 7, 10:41 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1041 PM CDT MON JUL 07 2003

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

1035 PM    NORTH PLATTE              NE   WIND DAMAGE
07/07/03   LINCOLN                        8 INCH TREE LIMBS DOWN

RLB

Special weather statement, Jul 7, 10:45 PM CDT, 1 hour 6 minutes before

NEZ022-056-080415-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1045 PM CDT MON JUL 7 2003

...SEVERE THUNDERSTORM WATCH CANCELLED FOR PORTIONS OF THE EASTERN
PANHANDLE OF NEBRASKA...

THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR GARDEN AND
DEUEL COUNTIES HAS BEEN CANCELLED. EARLIER THUNDERSTORMS
BROUGHT WIND GUST AS HIGH AS 99 MPH AND CAUSED EXTENSIVE
TREE DAMAGE TO PORTIONS OF DEUEL AND SOUTHERN GARDEN
COUNTY. HOWEVER THE SEVERE THUNDERSTORMS HAVE MOVED INTO SOUTHWEST
AND WEST CENTRAL NEBRASKA. ALTHOUGH ISOLATED SHOWERS AND
THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE OVER THE NEXT FEW HOURS...
THEY ARE NOT EXPECTED TO POSE A THREAT.

DP

Local storm report, Jul 7, 10:58 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1058 PM CDT MON JUL 07 2003

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

0935 PM    LEMOYNE                   NE   80 MPH WIND GUST
07/07/03   KEITH

RLB

Local storm report, Jul 7, 11:09 PM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1109 PM CDT MON JUL 07 2003

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

0940 PM    1 N OGALLALA              NE   WIND DAMAGE
07/07/03   KEITH                          RADIO TOWER DOWN

RLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 9:03 PM CDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	57 min
Jul 7, 9:08 PM CDT	Severe Thunderstorm Warning	LBF	Chase, Keith, Perkins	52 min
Jul 7, 9:34 PM CDT	Severe Thunderstorm Warning	LBF	Arthur	26 min
Jul 7, 9:51 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes, Lincoln, McPherson	54 min
Jul 7, 10:48 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	27 min
Jul 7, 10:50 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Logan	55 min
Jul 7, 11:10 PM CDT	Severe Thunderstorm Warning	LBF	Hooker, Thomas	65 min
Jul 8, 6:24 PM CDT	Severe Thunderstorm Warning	LBF	Sheridan	66 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2003 Every severe thunderstorm warning in 2003

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.