Alert archive / Michigan / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 52, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 13, 1999, 11:00 PM EDT for Allegan County, Michigan. It was in force for 20 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 13, 1999, 11:00 PM EDT (03:00 UTC)
- Expired
- Jun 13, 1999, 11:20 PM EDT
- In force
- 20 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
County Allegan County, MI
The nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 3.0 hours before the alert went out and 204 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
- 134 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 889 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 13, 6:15 PM EDT, 4 hours 45 minutes earlier.
Area forecast discussion, Jun 13, 6:15 PM EDT, 4 hours 45 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 615 PM EDT SUN JUN 13 1999 ...QUICK UPDATE TO DECREASE POP S OF GRR TONIGHT... RADAR SHOWS VERY LITTLE ACTIVITY SOUTH OF INTERSTATE 94 AT 22Z. THERE IS AN AREA OF SHOWERS/SOME MDT TO HVY RAIN IN AN ARC OVER S CNTL LK MI ASSOC WITH A WAVE ON THE FRONT NEAR SBN. THEN A MORE GENERAL AREA OF SHOWERS OVER CNTL LK MI NORTH OF THE PCPN ASSOC WITH THE WAVE. PRIMARY FRONT AT 22Z EXTENDS FROM NEAR MBS TO NEAR LAN TO NEAR SBN. WITH IR AND WATER VAPOR LOOPS SHOWING JET AND ASSOC SERIES OF SHTWVS OVER IOWA/NE AREA... EXPECT WAVE NEAR SBN TO BECOME PRIMARY WAVE... WHICH WILL BE WEST OF FCST TRACK OF ETA/NGM THIS EVENING. EXPECT FOCUS OF MOST PCPN TO BE NORTH OF THE TRACK OF THIS WAVE. SO... WILL GO WITH OCCASIONAL SHOWERS (EVEN THOUGH SOME DO NOT LIKE OCCASIONAL SHOWER TO IMPLY MORE FORCEFULLY IT WILL NOT BE RAINING MOST OF THE TIME/BUT IT WILL RAIN) OVER THE FROM I-96 NORTH. WILL ONLY HAVE POSSIBLE THUNDERSTORM IN THIS AREA SINCE INSTABLITY MOSTLY GONE AND LDS SHOWING LITTLE ASSOC WITH THIS PCPN AREA NOW. FOR SRN AREA... WILL HAVE SCT SHWRS/TSTMS WITH 40 PCT POP SINCE COULD BE REDEVELOPEMENT OF CONVECTION NEAR FRONT AS WAVE MOVES NORTH OF THIS AREA. WDM .GRR...NONE. WDM
In the hours before
Local storm report, Jun 13, 10:50 PM EDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1050 PM EDT SUN JUN 13 1999
TIME(EDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1025 PM HAMILTON MI WIND DAMAGE
06/13/99 ALLEGAN TRACTOR SALES BUILDING
DESTROYED BY STRONG WINDS.
WDMLocal storm report, Jun 13, 10:50 PM EDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1050 PM EDT SUN JUN 13 1999
TIME(EDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1025 PM HAMILTON MI WIND DAMAGE
06/13/99 ALLEGAN TRACTOR SALES BUILDING
DESTROYED BY STRONG WINDS.
WDMThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 10:31 PM EDT | Severe Thunderstorm Warning | GRR | Allegan | 29 min |
| Jun 13, 10:35 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 55 min |
| Jun 13, 11:50 PM EDT | Tornado Warning | GRR | Kent | 25 min |
| Jun 14, 12:24 AM EDT | Severe Thunderstorm Warning | GRR | Montcalm | 51 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1999Every severe thunderstorm warning in 1999
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.