Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 24, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jul 1, 1987, 7:01 PM MDT for Keith County, Lincoln County, Perkins County, Nebraska. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jul 1, 1987, 7:01 PM MDT (01:01 UTC)
- Expired
- Jul 1, 1987, 8:00 PM MDT
- In force
- 59 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
Counties Keith County, NE, Lincoln County, NE, Perkins County, NE
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.0 hours before the alert went out and 64 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
- 1802 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1678 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
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, Jul 1, 4:50 PM MDT, 2 hours 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 450 PM MDT WED ULY 1 1987 ...A TORNADO WATCH REMAINS IN EFFECT FOR SOUTHWEST NEBRASKA UNTIL 900 PM CDT THIS EVENING... AT 545 PM MDT NUMEROUS THUNDERSTORM HAVE MOVED INTO GRANT COUNTY AND NORTHWEST HOOKER COUNTY AND NORTHERN AUTHUR COUNTY IN NORTH-CENTRAL COUNTY. A VERY STRONG THUNDERSTORM WAS ABOUT 5 MILES WEST OF WHITMAN. A SPOTTER IN HOOKER COUNTY HAS REPORTED FREQUENT CLOU<D TO GROUND LIGHTNING FROM THIS STORM. THESE STORMS MAY PRODUCE HEAVY RAIN..SMALL HAIL..AND STRONG GUSTY SURFACE WINDS. THE STORMS WERE MOVING SOUTHEAST AT 15 MPH. SMALLFIELD
Special weather statement, Jul 1, 5:44 PM MDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 540 PM MDT WED JUL 1 1987 ...TORNADO WATCH FOR SOUTHWEST NEBRASKA UNTIL 900 PM MDT... VERY STRONG THUNDERSTORMS CONTINUED OVER PARTS OF NORTH CENTRAL NEBRASKA THIS AFTERNOON. AT 530 PM MDT VERY STRONG THUNDERSTORMS WERE LOCATED OVER GRANT AND HOOKER COUNTIES OF NORTH CENTRAL NEBRASKA. THE STRONGEST THUNDERSTORM WAS 10 MILES WEST OF MULLEN NEBRASKA IN HOOKER COUNTY. ALL THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MPH. OTHER STRONG THUNDERSTORMS WERE JUST ENTERING KEITH COUNTY OF SOUTHWEST NEBRASKA. THE THUNDERSTORMS WERE 15 MILES WEST OF OGALLALA NEBRASKA ALSO MOVING SOUTHEAST AT 15 MPH. PERSONS IN SOUTHWEST AND NORTH CENTRAL NEBRASKA CAN EXPECT DANGEROUS LIGHTNING...LOCALLY HEAVY RAIN...SMALL HAIL AND BRIEF GUSTY WINDS AS THESE THUNDERSTORMS MOVE ACROSS THE REGION INTO THE EVENING HOURS. PERSONS IN SOUTHWEST NEBRASKA IN AND CLOSE TO THE TORNADO WATCH hAREA SHOULD ALSO REMAIN ALERT TO ANY SUDDEN CHANGES IN THE WEATHER AND BE PREPARED TO MOVE TO A SAFE PLACE. MEYER
Special weather statement, Jul 1, 6:42 PM MDT, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 640 PM MDT WED JUL 1 1987 ...TORNADO WATCH FOR SOUTHWEST NEBRASKA UNTIL 900 PM MDT... VERY STRONG THUNDERSTORMS CONTINUED OVER PARTS OF NORTH CENTRAL AND SOUTHWEST NEBRASKA THIS AFTERNOON. AT 630 PM MDT A VERY STRONG THUNDERSTORM WAS IN WEST CENTRAL MCPHERSON COUNTY 12 MILES WEST OF TRYON NEBRASKA. THAT WOULD BE ABOUT 35 MILES NORTHWEST OF NORTH PLATTE NEBRASKA. OTHER WEAKER THUNDERSTORMS WERE SCATTERED ACROSS GRANT...HOOKER...THOMAS AND KEITH COUNTIES ALL IN NORTH CENTRAL AND SOUTHWEST NEBRASKA. ALL THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MPH. AT 635 PM MDT KEYSTONE NEBRASKA IN CENTRAL KEITH COUNTY REPORTED PEA TO MARBLE SIZE HAIL AND HEAVY RAIN. PERSONS IN SOUTHWEST AND NORTH CENTRAL NEBRASKA CAN EXPECT DANGEROUS LIGHTNING...LOCALLY HEAVY RAIN...SMALL HAIL AND BRIEF GUSTY WINDS AS THESE THUNDERSTORMS MOVE ACROSS THE REGION INTO THE EVENING HOURS. PERSONS IN SOUTHWEST NEBRASKA IN AND CLOSE TO THE TORNADO WATCH AREA SHOULD REMAIN ALERT TO ANY SUDDEN CHANGES IN THE WEATHER AND BE PREPARED TO MOVE TO A SAFE PLACE IF NECESSARY. MEYER
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 6:45 PM MDT | Severe Thunderstorm Warning | LBF | Boyd, Holt, Keya Paha, Rock | 60 min |
| Jul 1, 7:32 PM MDT | Tornado Warning | LBF | Chase | 28 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1987Every severe thunderstorm warning in 1987
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.