Alert archive / Michigan / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 23, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Jul 6, 1991, 4:53 PM EDT for Alpena County, Presque Isle County, Michigan. It was in force for 52 min. 2 reports 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 6, 1991, 4:53 PM EDT (20:53 UTC)
- Expired
- Jul 6, 1991, 5:45 PM EDT
- In force
- 52 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
Counties Alpena County, MI, Presque Isle County, MI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 5:00 PM EDT | Hail 1.75 | Presque Isle, MI | |
| Jul 6, 5:30 PM EDT | Hail 1.5 | Alpena, 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 (KY62), launched 12:00Z, 8.9 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1226 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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 6, 12:47 PM EDT, 4 hours 6 minutes before
MIZ039-048-060>062-064>068-061800- SPECIAL WEATHER STATEMENT AND SHORT RANGE FORECAST NATIONAL WEATHER SERVICE ALPENA MI 1245 PM EDT SAT JUL 6 1991 ...THUNDERSTORMS WILL REDEVELOP THIS AFTERNOON AND MAY BECOME SEVERE... AT 1230 PM...MOST OF THE SHOWER AND THUNDERSTORM ACTIVITY FROM THIS MORNING HAD COME TO AN END AND SKIES WERE BECOMING PARTLY TO MOSTLY SUNNY. TEMPERATURES WERE RISING THROUGH THE 70S AND WINDS WERE BEGINNING TO INCREASE OUT OF THE SOUTH. SKIES WILL REMAIN PARTLY TO MOSTLY SUNNY THROUGHOUT THE EARLY AFTERNOON WITH JUST A FEW SHOWERS AND THUNDERSTORMS. HOWEVER...BY MID TO LATE AFTERNOON THUNDERSTORMS WILL BECOME MORE NUMEROUS AND SOME COULD BECOME SEVERE...PRODUCING STRONG GUSTY WINDS...LARGE HAIL...AND HEAVY RAINFALL. TEMPERATURES WILL BE RISING TO THE MID 80S THIS AFTERNOON AND WINDS WILL CONTINUE TO INCREASE OUT OF THE SOUTH AND SOUTHWEST. PEOPLE IN NORTHEAST AND EXTREME NORTHERN MICHIGAN AND BOATERS ON THE LAKES SHOULD BE ON THE LOOK OUT FOR THREATENING WEATHER LATER THIS AFTERNOON. YOU MAY NEED TO SEEK SHELTER AS SOME OF THE STORMS COULD BE QUITE DANGEROUS. BDM
The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 5:51 PM EDT | Tornado Warning | APX | Alpena | 54 min |
| Jul 6, 5:55 PM EDT | Severe Thunderstorm Warning | APX | Presque Isle | 50 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1991Every severe thunderstorm warning in 1991
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.