Alert archive / Michigan / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 38, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Jul 20, 1987, 6:56 PM EDT for Alcona County, Alpena County, Iosco County, Michigan. It was in force for 64 min.
The area
The counties it named.
The facts
- Issued
- Jul 20, 1987, 6:56 PM EDT (22:56 UTC)
- Expired
- Jul 20, 1987, 8:00 PM EDT
- In force
- 64 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
Counties Alcona County, MI, Alpena County, MI, Iosco County, MI
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
Sault Ste Marie, MI (KSSM), launched 12:00Z, 10.9 hours before the alert went out and 209 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 202256 SVRAPN MIC007-001-069-210000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE ALPENA MI 656 PM EDT MON JUL 20 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 800 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST LOWER MICHIGAN...SOUTHERN ALPENA...EASTERN ALCONA AND EASTERN IOSCO ...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE COUNTIES JUST MENTIONED AT A LINE OF SEVERE THUNDERSTORMS WAS LOCATED FROM 10 MILES SOUTH OF ALPENA IN ALPENA COUNTY...SOUTH TO TAWAS CITY IN SOUTH IOSCO COUNTY. 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. THIS WARNING REPLACECES THE SEVERE THUNDERSTORM WARNINGS THAT WERE IN EFFECT UNTIL 700 PM EDT. THE TORNADO WARNING FOR ALCONA COUNTY IS CANCELLED. THE SERVER THUNDERSTORM WARNING FOR OSCODA COUNTY IS NO LONGER IN EFFECT. L 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, 5:42 PM EDT | Severe Thunderstorm Warning | APX | Alcona, Oscoda | 63 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 |
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; the sounding from the Mesonet's radiosonde archive.