Alert archive / Michigan / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 36, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Jul 20, 1987, 5:42 PM EDT for Alcona County, Oscoda County, Michigan. It was in force for 63 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
- Jul 20, 1987, 5:42 PM EDT (21:42 UTC)
- Expired
- Jul 20, 1987, 6:45 PM EDT
- In force
- 63 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
Counties Alcona County, MI, Oscoda County, MI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 6:00 PM EDT | Thunderstorm Wind 0 | Oscoda, MI |
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
Sault Ste Marie, MI (KSSM), launched 12:00Z, 9.7 hours before the alert went out and 202 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 684 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- -61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KAPN 202142 SVRAPN MIC135-001-202245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ALPENA MI 542 PM EDT MON JUL 20 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 645 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST LOWER MICHIGAN...OSCODA AND WESTERN ALCONA AT 535 PM EDT A SEVERE THUNDERSTORM WAS LOCATED FROM 5 MILES NORTHEAST THROUGH 10 MILES NORTHWEST OF MIO IN CENTRAL OSCODA COUNTY. THESE DTORM WAS MOVING TO THE EAST AT 40 MILES AN HOUR. IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORECED SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND LIGHTNING. REMEMBER...SEVERE THUNDERSTORMS CAN AND SOMETIMES DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT. INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS... STAY AWAY FROM HIGH OBJECTS. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES AND ELECTRICAL EQUIPMENT. THIS IS A DANGEROUS STORM. TAKE COVER IMMEDIATELY. KAMINSKE
The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 4:35 PM EDT | Severe Thunderstorm Warning | APX | Grand Traverse, Kalkaska, Missaukee, Wexford | 55 min |
| Jul 20, 4:51 PM EDT | Severe Thunderstorm Warning | APX | Lake | 69 min |
| Jul 20, 4:57 PM EDT | Tornado Warning | APX | Kalkaska, Missaukee, Wexford | 33 min |
| Jul 20, 4:57 PM EDT | Tornado Warning | APX | Grand Traverse | 28 min |
| Jul 20, 5:16 PM EDT | Tornado Warning | APX | Osceola | 29 min |
| Jul 20, 5:27 PM EDT | Severe Thunderstorm Warning | APX | Oscoda | 53 min |
| Jul 20, 5:59 PM EDT | Severe Thunderstorm Warning | APX | Alcona, Iosco | 46 min |
| Jul 20, 6:26 PM EDT | Tornado Warning | APX | Alcona | 34 min |
| Jul 20, 6:56 PM EDT | Severe Thunderstorm Warning | APX | Alcona, Alpena, Iosco | 64 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.