Alert archive / Nebraska / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 251, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Aug 4, 2003, 6:35 PM MDT for Cherry County, Keya Paha County, Nebraska. It was in force for 55 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
- Aug 4, 2003, 6:35 PM MDT (00:35 UTC)
- Expired
- Aug 4, 2003, 7:30 PM MDT
- In force
- 55 min
- Issued by
- NWS North Platte, NE
- Area
- Counties, with a storm outline in the text
Counties Cherry County, NE, Keya Paha County, NE
The radar
The North Platte radar (KLNX), 116 km from the middle of the area, began a volume at 00:34 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 nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.6 hours before the alert went out and 206 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.
- Mixed-layer CAPE
- 2097 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 2295 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
717 WUUS53 KLBF 050035 SVRLBF NEC031-103-050130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 732 PM CDT MON AUG 4 2003 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN KEYA PAHA COUNTY IN NORTH CENTRAL NEBRASKA NORTHEASTERN CHERRY COUNTY IN NORTH CENTRAL NEBRASKA * UNTIL 830 PM CDT * AT 728 PM CDT...NORTH PLATTE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SPARKS...OR ABOUT 14 MILES EAST OF VALENTINE... MOVING EAST AT 15 MPH. THE STORM HAS A HISTORY OF PRODUCING ON INCH DIAMETER HAIL. * THE SEVERE THUNDERSTORM WILL BE NEAR... FARM AND RANGELANDS OF WESTERN KEYA PAHA COUNTY 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. THIS THUNDERSTORM IS CAPABLE OF PRODUCING EXTREMELY LARGE HAIL WHICH MAY CAUSE SERIOUS INJURY AND SEVERE DAMAGE TO PROPERTY. MOVE TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. LAT...LON 4306 10036 4288 10042 4274 9977 4299 9972 $$ SPRINGER
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 Aug 4, 1:33 PM MDT, 5 hours 2 minutes earlier.
Area forecast discussion, Aug 4, 1:33 PM MDT, 5 hours 2 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 233 PM CDT MON AUG 4 2003 SHORTWAVE AT 18Z EXTENDS FROM EXTREME WRN SD INTO SERN WY. RESULTANT DRYING VERY EVIDENT ON WV IMAGERY. BOTH THE ETA AND GFS AGREE ON MCS DEVELOPING FROM ERN KS INTO SRN MO TONIGHT WITH A SECOND AREA SOUTHEAST THROUGH THE MISSOURI VALLEY. MODELS NOT DEVELOPING PRECIP INVO SFC TROUGH AND DRYLINE IN WRN NEBRASKA LATE THIS AFTERNOON INTO THIS EVENING. APPROACHING WAVE...CONVERGENCE ALONG TROUGH AND SOME REMAINING BOUNDARIES FROM A.M. CONVECTION SUPPORT SCATTERED TSRA BY LATE THIS AFTERNOON GENERALLY NEAR AN OGALLALA TO CODY LINE. IN FACT ALREADY A LINE OF TCU GOING UP IN NWRN KS INTO SWRN NEBR AT 18Z. GOOD MOISTURE AVBL EAST OF ANW TO BBW WHERE PW VALUES ABOVE 1.5 INCHES. SOME LOCALLY HEAVY RAIN PSBL IN FAR ERN CWFA THIS EVENING. ALL CONVECTION SHOULD MOVE OUT OF ERN CWFA SOON AFTER MIDNIGHT. A SLIGHT COOLDOWN TUESDAY AS H85 WINDS TURN TO THE NORTH. UPPER RIDGE BUILDS INTO REGION WITH TEMPS RISING INTO THE MID AND UPPER 90S. WILL GO DRY THROUGH THE PERIOD WHEN STORM TRACK ACROSS MONTANA-NORTH DAKOTA. EXTENDED DISCUSSION...THE LATEST GFS CAME IN MUCH DIFFERENTLY THAN PREVIOUS RUN AND LATEST EUROPEAN. WILL FAVOR PREVIOUS RUN AND KEEP GOING FORECAST HOT AND DRY FRIDAY THROUGH MONDAY. .LBF...NONE. KAR
Hazardous weather outlook, Aug 4, 2:30 PM MDT, 4 hours 5 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-094-051030- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORTH PLATTE NE 330 PM CDT MON AUG 4 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND NORTH CENTRAL NEBRASKA. .DAY ONE...TONIGHT THERE IS A SLIGHT CHANCE FOR SEVERE THUNDERSTORM DEVELOPMENT ALONG A DRY LINE WHICH IS LOCATED NEAR A NORTH PLATTE TO VALENTINE LINE. AHEAD OF THE DRYLINE SURFACE DEW POINT TEMPERATURES RANGE IN THE MID TO UPPER 60S WITH SOUTHERLY WINDS. BEHIND THIS LINE ACROSS WESTERN NEBRASKA WINDS ARE TURNING WEST AND DEW POINTS ARE FALLING THROUGH THE 50S. SEVERE WEATHER POTENTIAL MAY BE LIMITED BY THE WEAK WIND FIELDS WITH MID LEVEL WINDS LESS THAN 20 KNOTS. HOWEVER GIVEN THE VERY UNSTABLE AIRMASS AND THE TURNING OF THE WINDS WITH HEIGHT...LARGE HAIL AND TORNADOES ARE POSSIBLE. AS THE DRIER AIR ADVANCES LATE THIS AFTERNOON AND EVENING WINDS WILL BECOME MORE WESTERLY STORM TYPE WILL FAVOR THE DEVELOPMENT OF DAMAGING THUNDERSTORM WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. TUESDAY THROUGH SUNDAY NO RAINFALL IS EXPECTED AS TEMPERATURES TREND UPWARDS. THE UPPER RIDGE STRENGTHENS AND BUILDS EAST TUESDAY WITH AN ISOLATED CHANCE THAT THUNDERSTORMS MAY FORM LATE IN THE DAY WEDNESDAY. PIECES OF ENERGY WILL EJECT ACROSS THE PLAINS ON WEDNESDAY AS THE LOW LEVEL JET STRENGTHENS OVERNIGHT. HOWEVER AS THE UPPER RIDGE STRENGTHENS THE STRONGER DYNAMICS WILL SHIFT NORTHWARD WITH NO THUNDERSTORMS FORECASTED THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT. SPOTTER ACTIVATION IS NOT ANTICIPATED TUESDAY THROUGH SUNDAY. HIRSCH
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 7:28 PM MDT | Severe Thunderstorm Warning | LBF | Keya Paha | 62 min |
| Aug 4, 8:09 PM MDT | Severe Thunderstorm Warning | LBF | Brown | 66 min |
| Aug 4, 8:39 PM MDT | Severe Thunderstorm Warning | LBF | Rock | 66 min |
| Aug 4, 9:35 PM MDT | Severe Thunderstorm Warning | LBF | Keya Paha | 55 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2003Every 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.