Alert archive / Nebraska / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 94, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Sep 12, 1991, 6:24 PM CDT for Boone County, Nebraska. It was in force for 66 min. 3 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
- Sep 12, 1991, 6:24 PM CDT (23:24 UTC)
- Expired
- Sep 12, 1991, 7:30 PM CDT
- In force
- 66 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Boone County, NE
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 12, 6:45 PM CDT | Hail 1.25 | Boone, NE | |
| Sep 12, 7:00 PM CDT | Thunderstorm Wind 0 | Boone, NE | |
| Sep 12, 7:20 PM CDT | Thunderstorm Wind 0 | Boone, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.4 hours before the alert went out and 221 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
- 264 J/kg
- Mixed-layer CIN
- -192 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.5
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, Sep 12, 6:09 PM CDT, 15 minutes before
NEZ012-130030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 610 PM CDT THU SEP 12 1991 ...STRONG THUNDERSTORMS IN WEST CENTRAL NEBRASKA... STRONG THUNDERSTORMS WERE LOCATED JUST iEAST OF THE NORTH PLATTE AREA AND SHOULD BE MOVING NORTHEAST AT AROUND 20 MPH. THESE STORMS COULD PRODUCE HEAVY RAIN..STRONG WINDS AND HAIL AS THEY MOVE NORTHEAST THROUGH LINCOLN COUNTY BETWEEN 6 PM AND 8PM CDT. RC
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 7:50 AM CDT | Tornado Warning | LBF | Garfield | 25 min |
| Sep 12, 8:12 AM CDT | Severe Thunderstorm Warning | LBF | Wheeler | 33 min |
| Sep 12, 4:35 PM CDT | Severe Thunderstorm Warning | LBF | Garfield | 55 min |
| Sep 12, 6:24 PM CDT | Severe Thunderstorm Warning | LBF | Antelope | 46 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1991Every severe thunderstorm warning in 1991
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.