Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 17, NWS Hastings, NE
NWS Hastings, NE issued this severe thunderstorm warning at Apr 14, 1998, 8:19 PM CDT for Polk County, Nebraska. It was in force for 26 min. 1 report 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
- Apr 14, 1998, 8:19 PM CDT (01:19 UTC)
- Expired
- Apr 14, 1998, 8:45 PM CDT
- In force
- 26 min
- Issued by
- NWS Hastings, NE
- Area
- Whole counties
County Polk County, NE
The radar
The Omaha radar (KOAX), 102 km from the middle of the area, began a volume at 01:23 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 |
|---|---|---|---|
| Apr 14, 8:30 PM CDT | Thunderstorm Wind 55 | Shelby, 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 |
|---|---|---|---|
| Apr 14, 3:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.3 hours before the alert went out and 101 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
- 3 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 1639 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 444 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Apr 14, 2:09 PM CDT, 6 hours 10 minutes earlier.
Area forecast discussion, Apr 14, 2:09 PM CDT, 6 hours 10 minutes before
CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HASTINGS NE 209 PM CDT TUE APR 14 1998 FIRST PROBLEM IS INITIAL PERIOD SEVERE WEATHER POTENTIAL. 18Z SURFACE MAP DEPICTS BOUNDARY INTO SOUTHEAST CWFA. SOUTHEAST OF BOUNDARY TEMPERATURES INTO THE LOWER 70S WITH STRENGTHENING SOUTHEAST WIND FIELD. PROFILER DATA (SLIGHTLY OLD) WITH STRONG VEERING AT FBY AT 15Z THIS MORNING. SUFACE LOW IS DEEPENING JUST SW OF KHLC WITH STATIONARY DRY LINE TO MEDICINE LODGE. SURFACE DEWPOINTS INCREASE TO 50+ IN A RIBBON FROM WICHITA TO NORTHEAST OF KHLC. INHIBITION PARAMETERS LOOK TO BE WEAKENING SLIGHTLY NEAR MAX SFC CONVERGENCE AS CU FIELDS DEVELOPS NEAR PHILLIPSBURG. LATEST RUC COINCIDES THESE FEATURES WELL WITH INCREASING UPPER DIVERGENCE AND LOW LEVEL CONVERGENCE FIELDS MOVING ACROSS CWFA AND INTO SOUTHEAST NEBRASKA BY EARLY EVENING. RIBBON OF 10C H85 DEWPOINTS MOVE NEAR THE SOUTHEAST CORNER OF OUR CWFA BY 00Z. ALTHOUGH LIMITED MOISTURE AND INSTABILITY INITIALLY...DYNAMIC PARAMETERS LOOK FAVORABLE FOR LATE AFTERNOON AND EARLY EVENING EPISODE OF SEVERE FOR SOUTHEAST CWFA. WILL DELAY OPUGRI PRODUCT AS LONG AS POSSIBLE OR UNTIL ANY OFFICAL NOTICE GIVEN. FINALLY...LOW FFG VALUES IN A FEW COUNTIES OF SOUTEAST CWFA...ALONG WITH 1.5 INCHES OF RAIN TWO NIGHTS AGO MAY CAUSE A PROBLEM THERE. QUICKLY...VERY DISTINCT CHANGES IN WEATHER BY LATE TONIGHT AS UPPER LOW AND SURFACE MOVE EAST WRAPPING STRONG NNE WINDS ACROSS CWFA. H7 LOW MOVING EAST AT 36HRS WILL REQUIRE HIHG POPS THROUGH WEDNESDAY NIGHT. COLD ENOUGH AIR OVERNIGHT WEDNESDAY TO MIX/CHANGE TO SNOW IN NORTHWEST CWFA. AMOUNTS LIMITED THOUGH. HAVE LITTLE PROBLEM WITH COLD GUIDANCE TEMPERATURES AND MAY UNDER SOME IN SPOTS. GRI NN 040/048/033/046 ++62 LXN NN 038/046/030/046 ++6- ODX NN 038/044/030/046 +++3 HBR NN 045/052/035/048 +++3 BLT NN 048/058/038/048 +762 MORITZ
The office that day
Everything else NWS Hastings, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 7:32 PM CDT | Severe Thunderstorm Warning | GID | York | 43 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1998Every severe thunderstorm warning in 1998
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.