Alert archive / Nebraska / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 185, NWS North Platte, NE

July 5, 2003Rock County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 5, 2003, 7:01 PM CDT for Rock County, Nebraska. It was in force for 59 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 5, 2003, 7:01 PM CDT (00:01 UTC)
Expired: Jul 5, 2003, 8:00 PM CDT
In force: 59 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Rock County, NE

The radar

The North Platte radar (KLNX), 97 km from the middle of the area, began a volume at 00:01 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 5, 3:10 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.0 hours before the alert went out and 162 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: 2632 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 2141 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.1

Open this sounding in Storm Lab

The text

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

635 
WUUS53 KLBF 060001
SVRLBF
NEC149-060100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
701 PM CDT SAT JUL 5 2003

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ROCK COUNTY IN NORTH CENTRAL NEBRASKA

* UNTIL 800 PM CDT

* AT 655 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE MOST DANGEROUS PART OF A SEVERE THUNDERSTORM 6 MILES NORTHEAST
  OF ROSE...OR ABOUT 25 MILES SOUTH OF BASSETT...MOVING NORTH AT 20
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  11 MILES EAST OF BASSETT AROUND 755 PM CDT
  3 MILES SOUTH OF NEWPORT AROUND 800 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SATURDAY EVENING FOR WESTERN NEBRASKA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM CDT SATURDAY EVENING FOR
SOUTHWEST NEBRASKA.

LAT...LON 4209 9966 4209 9924 4271 9927 4271 9966
          4235 9965

$$
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 5, 1:56 PM CDT, 5 hours 5 minutes earlier.

Area forecast discussion, Jul 5, 1:56 PM CDT, 5 hours 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
156 PM CDT SAT JUL 5 2003

...SEVERE WEATHER PATTERN TONIGHT THROUGH TUESDAY...

SATELLITE AND DENSE NETWORK OF SURFACE OBSERVATIONS INDICATE STRONG
THETA E ADVECTION IS ONGOING THIS AFTN ACROSS NW ZONES.  FARTHER
SOUTH DRYLINE IS BEGINNING TO BULGE E VCNTY SNY-BFF.  ACROSS NW KS...
EXCELLENT WAA IS UNDERWAY WITH SFC TEMPS IN THE UPPER 90S TO NR 100.
PROFILER AND MODELS INDICATE STRONG SHEAR ALOFT...35 TO 55 KTS.
ALSO...CAP WEAKENS SHARPLY BETWEEN LBF AND UNR AND WATER VAPOR SHOWS
A SHORT WAVE EXITING ERN WY.  ALL INDICATIONS ARE SEVERE STORMS WILL
DEVELOP THIS AFTN/EVE AND FCST HAS BEEN UPDATED TO REFLECT THIS.

SUNDAY...MOISTURE...SHEAR AND ANOTHER UPPER WAVE MOVE THROUGH WITH
ACTION DEVELOPING...MAINLY E OF HIGHWAY 83 LATE AFTN/EVEN.

MONDAY...SFC FRONT DRAPES ACROSS SW NEB.  SHEAR REMAINS STRONG...
AND MOISTURE POOLING ALONG THE FRONT PROVIDE VOLATILE INGREDIENTS
FOR MORE LATE DAY STORMS.

TUES...ETA CENTERS INSTABILITY ACROSS NCNTL ZONES.  HEAT LOW REMAINS
ANCHORED OVER SW NEB.  SHEAR CONTINUES.  EXPECT MORE
DIURNALLY/DYNAMICALLY DRIVEN STORMS.

WEDS THRU SAT...SHEAR WEAKENS AND CONDITIONS BECOME LESS FAVORABLE
FOR STORMS.  FCST IS DRY.

.LBF...NONE.

CDC

Hazardous weather outlook, Jul 5, 4:34 PM CDT, 2 hours 27 minutes before

NEZ004>010-022>029-035>038-056>059-069>071-094-061030-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
434 PM CDT SAT JUL 5 2003

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

.DAY ONE...TONIGHT...THERE IS A MODERATE RISK OF SEVERE
THUNDERSTORMS EAST OF A LINE FROM MERRIMAN...IN CHERRY COUNTY TO
CURTIS IN FRONTIER COUNTY. THERE IS A SLIGHT RISK OF SEVERE
THUNDERSTORMS OVER THE ENTIRE OUTLOOK AREA.

A SURFACE BOUNDARY ALONG THE NEBRASKA KANSAS BORDER WILL DRIFT
SLOWLY NORTH TONIGHT AS AN UPPER LEVEL DISTURBANCE MOVES EAST OUT OF
WYOMING. THIS BOUNDARY WILL PROVIDE THE FOCUS FOR THUNDERSTORM
DEVELOPMENT.

AS THE DISTURBANCE...MOVES EAST INTO THE OUTLOOK AREA...IT WILL
COMBINE WITH DEEP LOW LEVEL MOISTURE AND AN ALREADY UNSTABLE
ATMOSPHERE. THE MAIN THREAT WITH THE STORMS THAT DEVELOP WILL BE
VERY LARGE HAIL AND ISOLATED TORNADOES.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ON SUNDAY...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS NORTH AND
EAST OF A LINE FROM CODY...IN NORTH CENTRAL CHERRY COUNTY...TO NORTH
PLATTE...TO BRADY...IN EASTERN LINCOLN COUNTY. AN AREA OF LOW
PRESSURE WILL MOVE EAST ACROSS THE OUTLOOK AREA AND THUNDERSTORMS
ARE EXPECTED TO DEVELOP SUNDAY AFTERNOON INTO SUNDAY EVENING IN THE
VICINITY OF THE LOW. THE MAIN THREAT WITH THESE STORMS WILL BE
DAMAGING WINDS AND LARGE HAIL.

SHOWERS AND THUNDERSTORMS ARE POSSIBLE MONDAY AND TUESDAY ACROSS THE
OUTLOOK AREA. AT THIS TIME...NO SEVERE WEATHER IS ANTICIPATED.

THUNDERSTORMS ARE NOT EXPECTED WEDNESDAY THROUGH FRIDAY AS HIGH
PRESSURE BUILDS INTO THE CENTRAL PLAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED SATURDAY AND SUNDAY DURING THE LATE
AFTERNOON AND EVENING HOURS. AT THIS TIME...SPOTTER ACTIVATION IS
NOT ANTICIPATED MONDAY THROUGH FRIDAY.

POWER

In the hours before

Local storm report, Jul 5, 6:40 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
0640 PM CDT SAT JUL 05 2003

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

0620 PM    3 N CODY                  NE   2.75 IN HAIL
07/05/03   CHERRY

RLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 7:06 PM CDT	Severe Thunderstorm Warning	LBF	Brown	54 min
Jul 5, 7:19 PM CDT	Tornado Warning	LBF	Rock	41 min
Jul 5, 7:32 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	58 min
Jul 5, 7:43 PM CDT	Severe Thunderstorm Warning	LBF	Holt	77 min
Jul 5, 8:05 PM CDT	Severe Thunderstorm Warning	LBF	Brown	55 min
Jul 5, 8:10 PM CDT	Severe Thunderstorm Warning	LBF	Rock	65 min
Jul 5, 8:11 PM CDT	Tornado Warning	LBF	Holt	49 min
Jul 5, 8:35 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Loup	55 min
Jul 5, 8:48 PM CDT	Tornado Warning	LBF	Blaine, Loup	42 min
Jul 5, 9:00 PM CDT	Tornado Warning	LBF	Holt	60 min
Jul 5, 9:26 PM CDT	Severe Thunderstorm Warning	LBF	Garfield, Wheeler	64 min
Jul 5, 9:33 PM CDT	Severe Thunderstorm Warning	LBF	Loup	27 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.