Alert archive / Michigan / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 11, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Jul 9, 1987, 2:17 PM EDT for 4 counties in Michigan. It was in force for 58 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 9, 1987, 2:17 PM EDT (18:17 UTC)
- Expired
- Jul 9, 1987, 3:15 PM EDT
- In force
- 58 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
Counties Benzie County, MI, Grand Traverse County, MI, Leelanau County, MI, Manistee 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 9, 2:30 PM EDT | Hail 0.75 | Benzie, 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, 6.3 hours before the alert went out and 239 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
- 1280 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 9, 10:32 AM EDT, 3 hours 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAULT STE MARIE MI 1045 AM EDT THU JUL 9 1987 ...HEAVY THUNDERSTORMS RUMBLING OVER EASTERN UPPER MICHIGAN... RADAR INDICATED A LINE OF THUNDERSTORMS EXTENDING FROM JUST EAST OF GRAND MARIAS SOUTH TO TROUT LAKE AND ACROSS THE MACKINAW BRIDGE AREA SOUTH TO CROSS VILLAGE AND CHARLEVOIX. SOME OF THESE THUNDERSTORMS ARE QUITE INTENSE IN NATURE AS HEAVY RAIN..GUSTY WINDS..POSSIBLE HAIL AND FREQUENT LIGHTNING ARE POSSIBLE. THE LINE OF THUNDERSTORMS WAS MOVING TO THE EAST NORTHEAST AT 15 TO 20 MPH. IF THREATENING WEATHER APPROACHES..BE PREPARED TO SEEK SAFE SHELTER IMMEDIATELY. SHNOWSKI
The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 1:35 PM EDT | Severe Thunderstorm Warning | APX | Antrim | 55 min |
| Jul 9, 4:00 PM EDT | Severe Thunderstorm Warning | APX | Luce, Mackinac | 60 min |
| Jul 9, 5:10 PM EDT | Severe Thunderstorm Warning | APX | Kalkaska | 35 min |
| Jul 9, 7:02 PM EDT | Severe Thunderstorm Warning | APX | Newaygo | 43 min |
| Jul 9, 7:28 PM EDT | Severe Thunderstorm Warning | APX | Lake | 42 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.