Alert archive / Nebraska / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 141, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at May 19, 2007, 4:05 PM CDT for Brown County, Rock County, Nebraska. It was in force for 41 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
- May 19, 2007, 4:05 PM CDT (21:05 UTC)
- Expired
- May 19, 2007, 4:46 PM CDT
- In force
- 41 min
- Issued by
- NWS North Platte, NE
- Area
- Counties, with a storm outline in the text
Counties Brown County, NE, Rock County, NE
The radar
The North Platte radar (KLNX), 85 km from the middle of the area, began a volume at 21:09 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 12:00Z, 9.1 hours before the alert went out and 152 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
- 34 J/kg
- Mixed-layer CIN
- -442 J/kg
- Mixed-layer LCL
- 1500 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KLBF 192105 SVRLBF NEC017-149-192145- /O.NEW.KLBF.SV.W.0141.070519T2105Z-070519T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 405 PM CDT SAT MAY 19 2007 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL BROWN COUNTY IN NORTH CENTRAL NEBRASKA... SOUTHERN ROCK COUNTY IN NORTH CENTRAL NEBRASKA... * UNTIL 445 PM CDT * AT 404 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 8 MILES WEST OF TWIN LAKES STATE WILDLIFE MANAGEMENT AREA...OR ABOUT 21 MILES SOUTH OF BASSETT. THIS STORM WAS NEARLY STATIONARY. * THE SEVERE THUNDERSTORM WILL BE NEAR... 7 MILES WEST OF TWIN LAKES STATE WILDLIFE MANAGEMENT AREA BY 445 PM CDT... LAT...LON 4228 9991 4215 9980 4231 9928 4247 9935 $$ MASEK
2 follow-up statements
000 WWUS53 KLBF 192121 SVSLBF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 420 PM CDT SAT MAY 19 2007 NEC017-149-192145- /O.CON.KLBF.SV.W.0141.000000T0000Z-070519T2145Z/ ROCK NE-BROWN NE- 420 PM CDT SAT MAY 19 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR EAST CENTRAL BROWN AND SOUTHERN ROCK COUNTIES... AT 419 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 10 MILES WEST OF TWIN LAKES STATE WILDLIFE MANAGEMENT AREA... OR ABOUT 20 MILES SOUTHEAST OF AINSWORTH. THIS STORM WAS NEARLY STATIONARY. THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL EASTERN BROWN COUNTY THRU 445 PM CDT RURAL WESTERN ROCK COUNTY THRU 445 PM CDT LAT...LON 4228 9991 4215 9980 4231 9928 4247 9935 $$ MASEK
000 WWUS53 KLBF 192146 SVSLBF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 445 PM CDT SAT MAY 19 2007 NEC017-149-192155- /O.CAN.KLBF.SV.W.0141.000000T0000Z-070519T2145Z/ ROCK NE-BROWN NE- 445 PM CDT SAT MAY 19 2007 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BROWN AND SOUTHERN ROCK COUNTIES IS CANCELLED... THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKEN. THUNDERSTORMS WILL CONTINUE IN THE AREA AND MAY PRODUCE SMALL HAIL. LAT...LON 4228 9991 4215 9980 4231 9928 4247 9935 $$ MASEK
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 May 19, 3:27 PM CDT, 38 minutes earlier.
Area forecast discussion, May 19, 3:27 PM CDT, 38 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 327 PM CDT SAT MAY 19 2007 .SYNOPSIS... AT THE SURFACE...LOW PRESSURE AND WEAK SFC BOUNDARY FRONT NEAR BASSETT TO NORTH OF THEDFORD TO SOUTHEAST OF ALLIANCE IS CURRENTLY MAIN FOCUS FOR CONVECTION. NAM INDICATES SLOW MOVEMENT TO SOUTHEAST INTO EARLY EVENING. OTHER SCATTERED STORM FIRING OFF FRONT RANGE WITH SOME DEVELOPMENT SOON EXPECTED IN TRI STATE AREA. && .DISCUSSION... BEST ORGANIZED ACTIVITY IN BROWN AND ROCK COUNTY AT 2115Z WITH CONGESTING CU FIELDS TRAILING TO THE WEST. 0-6KM SHEAR IS WEAK AT 15-20 KTS...THUS BRIEF HEAVY RAIN...PEA HAIL AND GUSTY WINDS TO 50 MPH ARE EXPECTED. ISOLATED SEVERE STILL A CONCERN FOR ROTATING STORMS ALONG BOUNDARY INTO EARLY EVENING. SFC FRONT WILL LIFT NORTH FOR SUNDAY THEN BY MONDAY...CYCLOGENESIS IN ERN CO WILL DEVELOP FRONT ACROSS FORECAST AREA. BEST AREAL COVERAGE OF THUNDERSTORMS WILL BE MONDAY AFTERNOON/OVERNIGHT AHEAD OF UPPER TROUGH. THIS FCST PKG LEANED TOWARD FASTER NAM/SREF SOLUTION REGARDING POPS/WINDS TEMPS INTO TUESDAY. GFS LOOKS TOO SLOW...EVEN IN COMPARISON TO 12Z ECMWF. BEST SEVERE THREAT TO BE MONDAY AFTERNOON/NIGHT...AS 0-6KM SHEAR OF 30-40 KTS JUST NW OF SFC FRONT. THUS INCREASED TO LIKELY POPS MUCH OF NCTRL. && .AVIATION... GENERALLY VFR CONDITIONS ARE EXPECTED THROUGH THE NEXT 24 HOURS OR SO AS THUNDERSTORM BASES SHOULD REMAIN AOA 5KFT AGL. HOWEVER AS PAST FEW NIGHTS...WIND GUSTS NEAR THESE STORMS COULD REACH OR EXCEED 50KT AS THEY COLLAPSE OR PRODUCE AN OUTFLOW BOUNDARY AND IN TURN REDUCED VISIBILITIES DUE TO BLOWING DUST...BOTH HAZARDOUS TO LIGHT AIRCRAFT. WEAKER WINDS ALOFT SHOULD ALSO PROHIBIT THE LLWS SEEN THE PAST FEW MORNINGS. MOISTURE AND BOUNDARIES WILL PERSIST ACROSS THE LBF TWEB ROUTES AGAIN SUNDAY AFTERNOON AND ISOLATED TO SCATTERED CONVECTION WILL BE POSSIBLE AGAIN. && .LBF WATCHES/WARNINGS/ADVISORIES... NONE. && KAR/13
Hazardous weather outlook, May 19, 3:37 PM CDT, 28 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORTH PLATTE NE 337 PM CDT SAT MAY 19 2007 NEZ004>010-022>029-035>038-056>059-069>071-094-201200- SHERIDAN-EASTERN CHERRY-KEYA PAHA-BOYD-BROWN-ROCK-HOLT-GARDEN- GRANT-HOOKER-THOMAS-BLAINE-LOUP-GARFIELD-WHEELER-ARTHUR-MCPHERSON- LOGAN-CUSTER-DEUEL-KEITH-PERKINS-LINCOLN-CHASE-HAYES-FRONTIER- WESTERN CHERRY- 337 PM CDT SAT MAY 19 2007 /237 PM MDT SAT MAY 19 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN AND NORTH CENTRAL NEBRASKA. .DAY ONE...TONIGHT. ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE ACROSS MUCH OF THE OUTLOOK AREA THROUGH THE LATE EVENING HOURS. HOWEVER THE BEST CHANCES LOOK TO BE ALONG AND SOUTH OF AN ALLIANCE TO AINSWORTH TO BUTTE LINE. WIDESPREAD SEVERE WEATHER IS NOT EXPECTED BUT A FEW ISOLATED STORMS MAY BE CAPABLE OF PRODUCING WIND GUSTS UP TO AROUND 50 MPH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THUNDERSTORMS WILL CONTINUE TO DEVELOP LATE IN THE DAY THROUGH THE EARLY MORNING HOURS ON SUNDAY...MONDAY AND TUESDAY. THUNDERSTORM PROBABILITIES WILL INCREASE DAILY AS A POWERFUL STORM SYSTEM APPROACHES THE CENTRAL PLAINS TUESDAY. THE THREAT OF THUNDERSTORMS WILL DECREASE WEDNESDAY THROUGH FRIDAY AS COOLER MORE STABLE AIR BUILDS INTO THE REGION. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. && THIS PRODUCT IS NOW AVAILABLE...ALONG WITH OTHER WEATHER... HYDROLOGICAL AND CLIMATE INFORMATION...AT HTTP://WWW.CRH.NOAA.GOV/LBF(ALL LOWERCASE) CDC/13
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 5:20 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 40 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2007Every severe thunderstorm warning in 2007
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.