Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 274, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Aug 23, 2001, 11:42 AM MDT for Cherry County, Nebraska. It was in force for 48 min. 1 report 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
- Aug 23, 2001, 11:42 AM MDT (17:42 UTC)
- Expired
- Aug 23, 2001, 12:30 PM MDT
- In force
- 48 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Cherry County, NE
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 23, 11:50 AM MDT | Hail 0.88 | Brownlee, 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 12:00Z, 5.7 hours before the alert went out and 136 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
- 2466 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 665 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
691 WUUS53 KLBF 231743 SVRLBF NEC031-231830- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 1142 AM MDT THU AUG 23 2001 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL CHERRY COUNTY IN NORTH CENTRAL NEBRASKA... * UNTIL 1230 PM MDT(130 PM CDT)... * AT 1139 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SOUTH CENTRAL CHERRY COUNTY...OR ABOUT 15 MILES NORTH OF MULLEN...MOVING NORTH AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE... OVER FARM AND RANGELANDS OF SOUTH CENTRAL CHERRY COUNTY...NORTH OF MULLEN ALONG STATE HIGHWAY 97. 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 4209 10141 4211 10072 4259 10069 4256 10134 $$ CLB
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 23, 2:15 AM MDT, 9 hours 27 minutes earlier.
Area forecast discussion, Aug 23, 2:15 AM MDT, 9 hours 27 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 315 AM CDT THU AUG 23 2001 ...HEAVY RAINFALL EVENT SETTING UP ACROSS THE CNTL PLAINS... POIGNANT UPPER LEVEL LOW FCST TO MOVE VERY SLOWLY ACROSS CNTL PLAINS THRU 60HRS. 850 MB THETA E ADVECTING WWD THIS AM INTO WRN NEB. H20 VAPOR SATELLITE SHOWS STG DIVERGENCE DEVELOPING NEWD TO THETA-E. ETA WHICH HAS BEEN DOING QUITE WELL THUS FAR WITH SYSTEM IGNITES A RARE WWD MOVING CONVECTIVE CLUSTER COVERING MUCH OF NEB WITH IGNITION AOA 15Z THIS AM OVER ERN NEB. CLUSTER SWEEPS WWD AND INTO PANHANDLE BY 21Z. PROPAGATION IS DISCRETE...MOVING W AT 40 MPH. UPPER LEVEL LOW BECOMES VERTICALLY STACKED BY EARLY EVENING ACROSS NRN KS. DEFORMATION ZONE MIGHT SET UP ACROSS SRN NEB ZONES AND SHIFT SLOWLY EWD TONIGHT. DESPITE FRONTOGENESIS OVER NW ZONES TONIGHT... LARGE SCALE DRYING ALOFT OCCURS. EXPECT SOME FOG COULD DEVELOP AS LOW LEVEL THETA E REMAINS IN PLACE. FRIDAY...SOME CHANCE FOR AFTN TSRA AS LIS REMAIN AROUND -4 TO -6. COLD AIR REMAINS ALOFT. NO STG FORCING IS EXPECTED SO NOTHING TO ORGANIZED. JUST A WEAK SPD MAX IN THE AFTN WITH SHEAR INCREASING TO NR 25 KT. FRIDAY NIGHT...NW FLOW DEVELOPS WITH A COLD FRONT MOVING S. MAIN ACTION DEVELOPS SAT PM ACROSS MUCH OF FCST AREA. LITTLE CHNG SUNDAY AFTN AS FRONT IS LOCATED OVER SWRN NEB AND ANOTHER SPD MAX MOVES IN. REST OF XTNDED OTAY. .LBF...NONE. CDC
In the hours before
Local storm report, Aug 23, 7:29 AM MDT, 4 hours 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE, NE
829 AM CDT THU AUG 23 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0815 AM 2 NW MADRID NE 1.00 INCH HAIL
08/23/01 PERKINS REPORTED BY SPOTTERS
JMLocal storm report, Aug 23, 8:00 AM MDT, 3 hours 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE, NE
900 AM CDT THU AUG 23 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0835 AM 5 NE GRANT NE .75 INCH HAIL
08/23/01 PERKINS REPORTED BY SPOTTERS
0700 PM 20 SSW ASHBY NE 70 MPH TSTM WIND GUST
08/22/01 GRANT
JMSpecial weather statement, Aug 23, 10:12 AM MDT, 1 hour 30 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-232045- SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA NATIONAL WEATHER SERVICE NORTH PLATTE NE 1112 AM CDT THU AUG 23 2001 ...STORM SPOTTER ACTIVATION IS NOT ANTICIPATED THIS AFTERNOON OR TONIGHT OVER WESTERN AND NORTH CENTRAL NEBRASKA... SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT ACROSS A MAJORITY OF THE OUTLOOK AREA. A FEW ISOLATED THUNDERSTORMS MAY APPROACH SEVERE LIMITS...BUT WIDESPREAD SEVERE WEATHER IS NOT ANTICIPATED. A UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE ACROSS SOUTHERN PORTIONS OF THE OUTLOOK AREA...TRIGGERING SHOWERS AND THUNDERSTORMS THROUGHOUT WESTERN AND NORTH CENTRAL NEBRASKA. DISTURBANCES ASSOCIATED WITH THIS LOW PRESSURE SYSTEM WILL CONTINUE TO MOVE ACROSS THE OUTLOOK AREA PROVIDING LIFT FOR THUNDERSTORMS DEVELOPMENT. THE MAIN THREAT WITH THESE STORMS WILL BE HEAVY RAIN...HOWEVER SMALL HAIL AND GUSTY WINDS WILL ALSO BE POSSIBLE. DP
Special weather statement, Aug 23, 11:01 AM MDT, 41 minutes before
NEZ004>010-022>029-035>038-056>059-069>071-232045- SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA NATIONAL WEATHER SERVICE NORTH PLATTE NE 1201 PM CDT THU AUG 23 2001 ...STORM SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT OVER PORTIONS OF WEST CENTRAL AND SOUTHWESTERN NEBRASKA... SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT ACROSS A MAJORITY OF THE OUTLOOK AREA. A FEW OF THESE THUNDERSTORMS MAY REACH SEVERE LIMITS...MAINLY SOUTH OF AN OGALLALA TO MULLEN TO OCONTO LINE. OTHER THUNDERSTORMS NORTH OF THIS LINE MAY APPROACH SEVERE LIMITS BUT WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. A UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE ACROSS SOUTHERN PORTIONS OF THE OUTLOOK AREA...TRIGGERING SHOWERS AND THUNDERSTORMS THROUGHOUT WESTERN AND NORTH CENTRAL NEBRASKA. DISTURBANCES ASSOCIATED WITH THIS LOW PRESSURE SYSTEM WILL CONTINUE TO MOVE ACROSS THE OUTLOOK AREA PROVIDING LIFT FOR THUNDERSTORMS DEVELOPMENT. THE MAIN THREAT WITH THESE STORMS WILL BE HEAVY RAIN...HOWEVER WITH ANY STORMS THAT REACH SEVERE LIMITS...LARGE HAIL WILL BE POSSIBLE. DP
Local storm report, Aug 23, 11:39 AM MDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE, NE
1239 PM CDT THU AUG 23 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1225 PM 3 S CHAMPION NE .75 INCH HAIL
08/23/01 CHASE REPORTED BY SPOTTERS
JMThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 6:58 AM MDT | Severe Thunderstorm Warning | LBF | Perkins | 32 min |
| Aug 23, 7:29 AM MDT | Severe Thunderstorm Warning | LBF | Perkins | 31 min |
| Aug 23, 11:21 AM MDT | Severe Thunderstorm Warning | LBF | Chase | 39 min |
| Aug 23, 12:46 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 59 min |
| Aug 23, 1:23 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 52 min |
| Aug 23, 3:22 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 38 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2001Every 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.