Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 201, NWS Hastings, NE
NWS Hastings, NE issued this severe thunderstorm warning at Aug 17, 1999, 11:11 PM CDT for Clay County, Nuckolls County, Nebraska. It was in force for 64 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 17, 1999, 11:11 PM CDT (04:11 UTC)
- Expired
- Aug 18, 1999, 12:15 AM CDT
- In force
- 64 min
- Issued by
- NWS Hastings, NE
- Area
- Whole counties
Counties Clay County, NE, Nuckolls County, NE
The radar
The Grand Island radar (KUEX), 33 km from the middle of the area, began a volume at 04:03 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 17, 11:20 PM CDT | Thunderstorm Wind 56 | Glenville, NE | |
| Aug 17, 11:20 PM CDT | Thunderstorm Wind 56 | Harvard, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 17, 9:15 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.2 hours before the alert went out and 232 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
- 2968 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1216 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.6
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Hastings, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 3:15 PM CDT, 7 hours 56 minutes earlier.
Area forecast discussion, Aug 17, 3:15 PM CDT, 7 hours 56 minutes before
SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION... NATIONAL WEATHER SERVICE HASTINGS NE 315 PM CDT TUE AUG 17 1999 ...THUNDERSTORM FORECAST THE MAIN CHALLENGE... LATEST RADAR MOSAIC/VISIBLE IMAGERY/LIGHTNING DATA SHOWING AN INCREASE IN CONVECTIVE TRENDS THIS AFTERNOON. A STRONG CELL HAS DEVELOPED OVER NE CO...LINGERING CONVECTION CONTINUES TO DEVELOP OVER NE KS...AND A MIX OF STRATIFORM/CONVECTION RAINS CONTINUE OVER WRN/NRN NEBRASKA. SEE WW 643 FOR DETAILS ON THIS ACTIVITY. 19Z LAPS DATA SHOWING 6700 J/KG OF CAPE OVER SMITH COUNTY KS. 18Z SURFACE ANALYSIS HAS FRONT FROM SW TO NE KS. H25 ANALYSIS FROM THIS MORNING SHOWING 90 KNOT JET CORE OVER ABR. MODELS AND SATELLITE DEPICT TWO SHORTWAVES HEADING THIS WAY FROM THE SW. THESE WAVES ARE ALREADY HELPING TO FIRE THE CONVECTION OVER THE HIGH PLAINS. AN ADDITIONAL WEAK WAVE IS PROGGED SLIDE TO OUR NORTH OUT OF MT...WHICH IN COMBINATION WITH THE SRN WAVES WILL ENHANCE THE UPPER DIVERGENCE DRAMATICALLY AFTER DARK. THIS WILL ALSO PLACE THE REGION UNDER THE RIGHT READ QUAD OF ABOVE MENTIONED JET CORE. THE VERTICAL MOTION FROM THE DIVERGENCE...DPVA...AND FRONTAL BOUNDARY WILL RESULT IN MUCH MORE CONVECTION TONIGHT WITH SOME STORMS POSSIBLY SEVERE GIVEN THE MAGNITUDE OF INSTABILITY. EXPECT CONVECTION OVER WRN HIGH PLAINS TO BECOME ORGANIZED INTO A FAIRLY LARGE MCS/MCC AND MIGRATE ESE NEAR THE SURFACE BOUNDARY. 315K ISENTROPIC SURFACE SLANTS UPWARD FROM KS INTO NEBRASKA AND IF THE H85 WINDS CAN EXCEED 20 KNOTS THE ISENTROPIC LIFT ALONG THIS SURFACE SHOULD HELP SUSTAIN THE MCS INTO THE MORNING HOURS. IN ADDITION TO ALL OF THIS...THE NORTHERN WAVE SHOULD BRING A WEAK FRONTAL BOUNDARY INTO THE CWFA SOMETIME DURING THE MORNING HOURS...WHICH WILL HELP RE-FIRE CONVECTION. CERTAINLY SOME CONCERN FOR EXCESSIVELY HEAVY RAINFALL AMOUNTS...BUT FFG VALUES ARE MOSTLY AROUND OR ABOVE 2.O INCHES. MOST AREAS HAVE NOT SEEN SIGNIFICANT RAINS FOR A FEW DAYS. WILL MENTION HEAVY RAIN IN ZONES AND MONITOR. ETA/NGM/RUN/AVN/MM5 ALL GENERATE RAIN OVER THE CWFA TONIGHT...SO WILL GO WITH 80 POPS FROM I-80 SOUTH TO THE BORDER...WITH 70 ELSEWHERE. ADAP DATA STILL SHOWING A 3-4 DEGREE C CAP OVER THE CWFA...SO THIS CAP SHOULD KEEP THE LATE AFTERNOON/EARLY EVENING HOURS QUIET. AFTER THE THREAT OF LINGERING MORNING SHOWERS ESPECIALLY IN THE EAST...MODELS BRING A DECENT SURFACE HIGH INTO REGION WITH SUBSTANTIALLY DRIER AIR. THE UPPER RIDGE PATTERN RETROGRADES BACK TO THE WEST WITH CWFA IN NW FLOW FOR THE REST OF THE WEEK. THIS ALWAYS BRINGS SOME CHANCE FOR WEAK WAVES MOVING THROUGH THE NW FLOW...BUT WE SHOULD REMAIN DRY ENOUGH TO INHIBIT MUCH RAIN INTO THU. AVN SHOWS A WAVE ON FRIDAY THAT SHOULD MAINLY AFFECT AREAS TO OUR EAST...BUT THIS MAY WARRANT A CHANCE IN THE EAST ON FRI. GUIDANCE TEMPERATURES LOOK REASONABLE EXCEPT THE HIGHS THURSDAY MAY BE A BIT COOLER THAN FWC/FAN. .GID...NONE. NIETFELD
In the hours before
Local storm report, Aug 17, 9:54 PM CDT, 1 hour 17 minutes before
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</html>Local storm report, Aug 17, 9:54 PM CDT, 1 hour 17 minutes before
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</html>Local storm report, Aug 17, 9:58 PM CDT, 1 hour 13 minutes before
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</html>The office that day
Everything else NWS Hastings, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 7:55 PM CDT | Severe Thunderstorm Warning | GID | Dawson | 65 min |
| Aug 17, 8:19 PM CDT | Tornado Warning | GID | Dawson | 41 min |
| Aug 17, 8:55 PM CDT | Tornado Warning | GID | Dawson | 65 min |
| Aug 17, 9:02 PM CDT | Severe Thunderstorm Warning | GID | Furnas, Gosper | 58 min |
| Aug 17, 9:25 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Phelps | 50 min |
| Aug 17, 9:46 PM CDT | Severe Thunderstorm Warning | GID | Harlan, Kearney | 59 min |
| Aug 17, 9:59 PM CDT | Severe Thunderstorm Warning | GID | Furnas, Gosper | 31 min |
| Aug 17, 10:13 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Phelps | 47 min |
| Aug 17, 10:16 PM CDT | Severe Thunderstorm Warning | GID | Franklin | 59 min |
| Aug 17, 10:31 PM CDT | Severe Thunderstorm Warning | GID | Adams, Hall | 59 min |
| Aug 17, 10:31 PM CDT | Severe Thunderstorm Warning | GID | Webster | 59 min |
| Aug 17, 10:40 PM CDT | Severe Thunderstorm Warning | GID | Kearney | 35 min |
| Aug 17, 10:46 PM CDT | Severe Thunderstorm Warning | GID | Furnas | 59 min |
| Aug 17, 11:31 PM CDT | Severe Thunderstorm Warning | GID | Adams, Hall, Webster | 29 min |
| Aug 17, 11:36 PM CDT | Severe Thunderstorm Warning | GID | Hamilton, Merrick | 54 min |
| Aug 17, 11:42 PM CDT | Severe Thunderstorm Warning | GID | Fillmore, Thayer, York | 78 min |
| Aug 17, 11:02 PM CDT | Severe Thunderstorm Warning | GID | Jewell, Smith | 58 min |
| Aug 17, 11:07 PM CDT | Severe Thunderstorm Warning | GID | Phillips | 68 min |
| Aug 17, 11:42 PM CDT | Severe Thunderstorm Warning | GID | Jewell, Osborne, Smith | 63 min |
| Aug 17, 11:42 PM CDT | Severe Thunderstorm Warning | GID | Phillips, Rooks | 63 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1999Every severe thunderstorm warning in 1999
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; radar from the NEXRAD Level II archive.