Alert archive / Michigan / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 12, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at May 28, 1991, 7:26 PM EDT for Mason County, Oceana County, Michigan. It was in force for 64 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
- May 28, 1991, 7:26 PM EDT (23:26 UTC)
- Expired
- May 28, 1991, 8:30 PM EDT
- In force
- 64 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
Counties Mason County, MI, Oceana County, MI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 28, 8:05 PM EDT | Tornado F2 | Oceana, 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.4 hours before the alert went out and 156 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
- 1199 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 972 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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, May 28, 5:13 PM EDT, 2 hours 13 minutes before
MIZ043-044-045-046-047-063-282200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUGHTON LAKE MI 510 PM EDT TUE MAY 28 1991 ...SEVERE THUNDERSTORMS OVER OTSEGO COUNTY... AT 510 PM EDT...TWO SEVERE THUNDERSTORMS WERE NEAR GAYLORD IN OTSEGO COUNDY. ONE WAS 5 MILES NORTHEAST AND THE OTHER WAS 10 MILES SOUTHWEST. BOTH WERE MOVING EAST AT 45 TO 50 MPH. IF YOU HAVE NOT TAKEN COVER YET...DO IT NOW. LH
The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 5:09 PM EDT | Severe Thunderstorm Warning | APX | Cheboygan, Montmorency, Presque Isle | 66 min |
| May 28, 5:18 PM EDT | Severe Thunderstorm Warning | APX | Montmorency | 42 min |
| May 28, 5:38 PM EDT | Severe Thunderstorm Warning | APX | Missaukee | 23 hr |
| May 28, 6:12 PM EDT | Severe Thunderstorm Warning | APX | Presque Isle | 63 min |
| May 28, 6:22 PM EDT | Severe Thunderstorm Warning | APX | Oscoda | 68 min |
| May 28, 6:34 PM EDT | Severe Thunderstorm Warning | APX | Alpena | 56 min |
| May 28, 6:53 PM EDT | Severe Thunderstorm Warning | APX | Alcona | 67 min |
| May 28, 7:19 PM EDT | Severe Thunderstorm Warning | APX | Iosco | 56 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.