Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 3, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 9, 1999, 6:15 PM MDT for Scotts Bluff County, Nebraska. It was in force for 15 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
- May 9, 1999, 6:15 PM MDT (00:15 UTC)
- Expired
- May 9, 1999, 6:30 PM MDT
- In force
- 15 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Scotts Bluff County, NE
The radar
The Cheyenne radar (KCYS), 120 km from the middle of the area, began a volume at 00:15 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 |
|---|---|---|---|
| May 9, 6:18 PM MDT | Hail 1 | Scottsbluff, NE | |
| May 9, 6:27 PM MDT | Hail 1.75 | Scottsbluff, NE | 1.75 inch hail fell 5 miles north of Scottsbluff, 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 00:00Z, 0.3 hours before the alert went out and 271 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
- 2480 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 1934 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 13.4
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.
In the hours before
Special weather statement, May 9, 3:10 PM MDT, 3 hours 5 minutes before
NEZ002-003-021-055-DDHHMM- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 310 PM MDT SUN MAY 9 1999 ...TORNADO WATCH IN EFFECT FOR THE CENTRAL NEBRASKA PANHANDLE... THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR THE CENTRAL PART OF THE NEBRASKA PANHANDLE. THE WATCH IS IN EFFECT FROM 330 PM UNTIL 900 PM THIS AFTERNOON AND EVENING. THE WATCH AFFECTS DAWES...BOX BUTTE...MORRILL AND CHEYENNE COUNTIES AND INCLUDES CITIES OF CHADRON...ALLIANCE AND SIDNEY. A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF THUNDERSTORMS CAPABLE OF DAMAGING WINDS...LARGE HAIL AND TORNADOES IN AND CLOSE TO THE WATCH AREA. STAY TUNED TO YOUR FAVORITE SOURCE OF WEATHER INFORMATION FOR LATER STATEMENTS AND POSSIBLE WARNING. BANN
Special weather statement, May 9, 3:10 PM MDT, 3 hours 5 minutes before
NEZ002-003-021-055-DDHHMM- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 310 PM MDT SUN MAY 9 1999 ...TORNADO WATCH IN EFFECT FOR THE CENTRAL NEBRASKA PANHANDLE... THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR THE CENTRAL PART OF THE NEBRASKA PANHANDLE. THE WATCH IS IN EFFECT FROM 330 PM UNTIL 900 PM THIS AFTERNOON AND EVENING. THE WATCH AFFECTS DAWES...BOX BUTTE...MORRILL AND CHEYENNE COUNTIES AND INCLUDES CITIES OF CHADRON...ALLIANCE AND SIDNEY. A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF THUNDERSTORMS CAPABLE OF DAMAGING WINDS...LARGE HAIL AND TORNADOES IN AND CLOSE TO THE WATCH AREA. STAY TUNED TO YOUR FAVORITE SOURCE OF WEATHER INFORMATION FOR LATER STATEMENTS AND POSSIBLE WARNING. BANN
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.