Alert archive / Michigan / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 28, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Jul 12, 1987, 5:12 PM EDT for Alpena County, Presque Isle County, Michigan. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1987, 5:12 PM EDT (21:12 UTC)
- Expired
- Jul 12, 1987, 6:15 PM EDT
- In force
- 63 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
Counties Alpena County, MI, Presque Isle 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, 9.2 hours before the alert went out and 147 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
- 44 J/kg
- Mixed-layer CIN
- -493 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 65 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 122121 COR SVRAPN MIC141-119-007-122215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING...CORRECTION... NATIONAL WEATHER SERVICE ALPENA MI 512 PM EDT SUN JUL 12 1987 ...TORNADO WATCH NUMBER 374 IS IN EFFECT UNTIL 1100 PM EDT... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST LOWER MICHIGAN...EASTERN PRESQUE ISLE...EASTERN MONTMORENCY AND WESTERN ALPENA AT 510 PMEDT ALPENA AND HOUGHTON LAKE RADAR INDICATED SEVERE THUNDERSTORMS EASTERN MONTMORENCY COUNTY IN NORTHEAST LOWER MICHIGAN MOVING TO THE NORTH NORTHEAST AT 30 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 REMEMBER...SEVERE THUNDERSTORMS CAN AND SOMETIMES DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT. SHIVELY
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 12, 1:21 PM EDT, 3 hours 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALPENA MI 115 PM EDT SUN JUL 12 1987 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF EASTERN UPPER MICHIGAN...PORTIONS OF NORTHERN AND WESTERN LOWER MICHIGAN...LAKE MICHIGAN AND A SMALL PART OF NORTHWEST LAKE HURON. THIS INCLUDES THE FOLLLOWING COUNTIES OF NORTHEAST LOWER MICHIGAN... PRESQUE-ISLE AND MONTMORENCY...AND THE ADJOINING COASTAL WATERS FROM MIDDLE ISLAND TO 20 MILES NORTHWEST OF HAMMOND BAY. ALTHOUGH NO SEVERE WEATHER HAS BEEN OBSERVED OR REPORTED...CONDITIONS ARE SUCH THAT SEVERE WEATHER COULD OCCUR. STAY TUNED TO YOUR LOCAL RADIO OR TV STATION...OR TO THE NOAA WEATHER RkADIO FOR THE LATEST DEVELOPMENTS OF THIS WATCH AREA. DS
Special weather statement, Jul 12, 2:43 PM EDT, 2 hours 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALPENA MI 237 PM EDT SUN JUL 12 1987 ...TORNADO WATCH NUMBER 374 IS IN EFFECT UNTIL 1100 EDT TONIGHT... A TORNADO WATCH IS IN EFFECT FOR THE EAST END OF UPPER MICHIGAN AND ALL OF LOWER MICHIGAN INCLUDING THE COASTAL WATERS OF LAKE HURON AND LAKE MICHIGAN. SEVERE THUNDERSTORM WATCH NUMBER 372 IS NO LONGER IN EFFECT. ALTHOUGH NO SEVERE WEATHER HAS BEEN OBSERVED OR REPORTED OVER NORTHEAST LOWER MICHIGAN...CONDITIONS EXIST IN WHICH SEVERE WEATHER COULD OCCUR. STAY TUNED TO THE NOAA WEATHER RAIDO OR TO YOUR LOCAL COMMERCIAL TV OR RADIO STATION FOR THE LATEST DEVELOPMENTS CONCERNING THIS WATCH AREA.
Special weather statement, Jul 12, 3:03 PM EDT, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAULT STE MARIE MI 300 PM EDT SUN JUL 12 1987 ...TORNADO WATCH IN EFFECT UNTIL 1100 PM EDT... ...SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING FOR MACKINAW COUNTY CANCELLED... THE SEVERE THUNDERSTORM WARNING IN EFFECT FOR EASTERN CHIPPEWA COUNTY HAS BEEN CANCELLED. HOWEVER A TORNADO WATCH IS IN EFFECT UNTIL 1100 PM EDT FOR MACKINAW..CHIPPEWA AND LUCE COUNTIES AS WELL OF ALL OF LOWER MICHIGAN. ONE HALF INCH HAIL AND WINDS GUSTING TO AROUND 40 MPH WAS REPORTED AT 215 PM EDT IN THE DAFTER AREA ...APPROXIMATELY 10 MILES SOUTH OF SAULT STE MARIE MICHIGAN. THE AREA OF THUNDERSTORMS HAS MOVED NORTHEAST INTO CANADA. RADAR DOES SHOW ANOTHER LINE OF THUNDERSTORMS JUST EAST OF MARQUETTE EXTENDING SOUTH. THESE STORMS ARE MOVING NORTHEAST AND SHOWING SIGNS OF INTENSIFING. MAS
Special weather statement, Jul 12, 3:11 PM EDT, 2 hours 1 minute before
SPECIAL WEATHER STATEMENT...CORRECTION... NATIONAL WEATHER SERVICE SAULT STE MARIE MI 300 PM EDT SUN JUL 12 1987 ...TORNADO WATCH IN EFFECT UNTIL 1100 PM EDT... ...SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING FOR CHIPPEWA COUNTY CANCELLED... THE SEVERE THUNDERSTORM WARNING IN EFFECT FOR EASTERN CHIPPEWA COUNTY HAS BEEN CANCELLED. HOWEVER A TORNADO WATCH IS IN EFFECT UNTIL 1100 PM EDT FOR MACKINAW..CHIPPEWA AND LUCE COUNTIES AS WELL OF ALL OF LOWER MICHIGAN. ONE HALF INCH HAIL AND WINDS GUSTING TO AROUND 40 MPH WAS REPORTED AT 215 PM EDT IN THE DAFTER AREA ...APPROXIMATELY 10 MILES SOUTH OF SAULT STE MARIE MICHIGAN. THE AREA OF THUNDERSTORMS HAS MOVED NORTHEAST INTO CANADA. RADAR DOES SHOW ANOTHER LINE OF THUNDERSTORMS JUST EAST OF MARQUETTE EXTENDING SOUTH. THESE STORMS ARE MOVING NORTHEAST AND SHOWING SIGNS OF INTENSIFING. MAS
Special weather statement, Jul 12, 4:35 PM EDT, 37 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION... NATIONAL WEATHER SERVICE SAULT STE MARIE MI 300 PM EDT SUN JUL 12 1987 ...TORNADO WATCH IN EFFECT UNTIL 1100 PM EDT... ...SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING FOR EASTERN CHIPPEWA COUNTY..NORTHERN LAKE HURON AND LAKE MICHIGAN INCLUDING THE STRAITS AREA AND MACKINAW BRIDGE IN EFFECT UNTIL 500 PM EDT. THUNDERSTORMS CONTINUE TO DEVELOP AND MOVE NORTHEAST ACROSS EASTERN UPPER MICHIGAN AND THE MACKINAW BRIDGE AREA. AT 430 PM DETOUR MARINA IN EASTERN UPPER MICHIGAN REPORTED PEA SIZE HAIL WITH WINDS GUSTING TO 55 AND 60 MPH. OTHER REPORTS OF HAIL HAVE BEEN REPORTED THROUGHOUT EASTERN UPPER MICHIGAN RANGING IN SIZE FROM PEA SIcZE TO THUMB NAIL SIZE. ALL THUNDERSTORMS WERE MOVING NORTHEAST AT APPROXIMATELY 25 TO 30 MPH. SHNOWSKI
Special weather statement, Jul 12, 4:36 PM EDT, 36 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION... NATIONAL WEATHER SERVICE SAULT STE MARIE MI 440 PM EDT SUN JUL 12 1987 ...TORNADO WATCH IN EFFECT UNTIL 1100 PM EDT... ...SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING FOR EASTERN CHIPPEWA COUNTY..NORTHERN LAKE HURON AND LAKE MICHIGAN INCLUDING THE STRAITS AREA AND MACKINAW BRIDGE IN EFFECT UNTIL 500 PM EDT. THUNDERSTORMS CONTINUE TO DEVELOP AND MOVE NORTHEAST ACROSS EASTERN UPPER MICHIGAN AND THE MACKINAW BRIDGE AREA. AT 430 PM DETOUR MARINA IN EASTERN UPPER MICHIGAN REPORTED PEA SIZE HAIL WITH WINDS GUSTING TO 55 AND 60 MPH. OTHER REPORTS OF HAIL HAVE BEEN REPORTED THROUGHOUT EASTERN UPPER MICHIGAN RANGING IN SIZE FROM PEAd SIZE TO THUMB NAIL SIZE. ALL THUNDERSTORMS WERE MOVING NORTHEAST AT APPROXIMATELY 25 TO 30 MPH. SHNOWSKI
The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:15 PM EDT | Severe Thunderstorm Warning | APX | Chippewa | 45 min |
| Jul 12, 4:15 PM EDT | Severe Thunderstorm Warning | APX | Chippewa | 45 min |
| Jul 12, 4:50 PM EDT | Tornado Warning | APX | Chippewa | 25 min |
| Jul 12, 5:12 PM EDT | Severe Thunderstorm Warning | APX | Montmorency | 38 min |
| Jul 12, 5:15 PM EDT | Severe Thunderstorm Warning | APX | Chippewa | 45 min |
| Jul 12, 5:41 PM EDT | Severe Thunderstorm Warning | APX | Alpena, Presque Isle | 49 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.