Alert archive / Michigan / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 1, NWS Grand Rapids, MI

April 12, 1994Branch County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Apr 12, 1994, 8:48 PM EDT for Branch County, Michigan. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Apr 12, 1994, 8:48 PM EDT (00:48 UTC)
Expired
Apr 12, 1994, 9:15 PM EDT
In force
27 min
Issued by
NWS Grand Rapids, MI
Area
Whole counties

County Branch County, MI

The nearest sounding before it

Detroit, MI (KFNT), launched 00:00Z, 0.8 hours before the alert went out and 161 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.

Skew-T log-pSkew-T log-p diagram, Detroit, MI at 00:00Z on 1994-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 00:00Z on 1994-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 368 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
510 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
368 m²/s²
0-3 km storm-relative helicity
373 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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, Apr 12, 7:16 PM EDT, 1 hour 32 minutes before
MIZ051-056>058-064-065-071-072-130100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
715 PM EDT TUE APR 12 1994

...ISOLATED THUNDERSTORM OVER SOUTHWEST LOWER MICHIGAN...

AT 705 PM... A SKYWARN SPOTTER IN HARTFORD... 30 MILES WEST OF
KALAMAZOO... OBSERVED PEA-SIZED HAIL. THIS STORM WAS MOVING NORTHEAST
AT 25 MPH AND SHOULD REACH BLOOMINGDALE BY 730 PM... AND ALLEGAN BY
750 PM.

BE ALERT FOR SMALL HAIL... INTENSE LIGHTNING AND STRONG GUSTY WINDS
AS THIS THUNDERSTORM MOVES THROUGH SOUTHWEST LOWER MICHIGAN.
STAY TUNED TO WEATHER RADIO STATIONS KIG 63... WWF 34... OR WWF 36 FOR
FURTHER UPDATES AND STATEMENTS.

HENDRICKS
Special weather statement, Apr 12, 7:35 PM EDT, 1 hour 13 minutes before
MIZ051-056>058-064-065-071-072-130100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
735 PM EDT TUE APR 12 1994

...THUNDERSTORMS DEVELOPING OVER PARTS OF SOUTHWEST LOWER MICHIGAN...

AT 730 PM EDT... WEATHER RADAR DETECTED A NEWLY DEVELOPED LINE OF
THUNDERSTORMS EXTENDING THROUGH THE BLOOMINGDALE AND HARTFORD
COMMUNITIES... 25 MILES WEST OF KALAMAZOO. THE THUNDERSTORMS WERE
MOVING NORTHEAST AT 20 MPH. PERSONS IN THE COMMUNITIES OF ALLEGAN...
PAW PAW AND LAWTON CAN EXPECT THESE STORMS BY 750 PM.

THESE STORMS MAY CONTAIN BRIEF HEAVY RAIN... STRONG GUSTY WINDS AND
POSSIBLE SMALL HAIL. AS WITH ALL THUNDERSTORMS... PEOPLE IN THE PATH
OF THESE STORMS SHOULD GO INDOORS TO A\VOID THE DANGERS ASSOCIATED WITH
LIGHTNING STRIKES.

HENDRICKS
a
Special weather statement, Apr 12, 7:35 PM EDT, 1 hour 13 minutes before
MIZ074-130130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LANSING MI
734 PM EDT TUE APR 13 1994

...DENSE FOG PLAGUING THE JACKSON AREA...

AT 730 PM EDT...FOG WAS REDUCING VISIBILITY TO 3/8 OF A MILE IN JACKSON.
FOG WAS ALSO OBSERVED OVER MUCH OF SOUTH CENTRAL LOWER MICHIGAN...
HOWEVER...VISIBILITIES WERE GENERALLY MORE THAN 2 MILES IN MOST AREAS.

MOTORISTS SHOULD BE PREPARED FOR AREAS OF LOW VISIBILITY DUE TO PATCHY
DENSE FOG.  TURN YbOUR HEADLIGHTS ON LOW BEAMS...AND ALLOW PLENTY OF
DISTANCE BETWEEN VEHICLES.

SHEETS
Special weather statement, Apr 12, 8:07 PM EDT, 41 minutes before
MIZ051-056>058-064-065-071-072-130100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
807 PM EDT TUE APR 12 1994

...THUNDERSTORMS OVER SOUTHWEST LOWER MICHIGAN...

AT 802 PM EDT... WEATHER RADAR INDICATED A LINE OF SHOWERS AND
THUNDERSTORMS OVER THE COMMUNITIES OF BURNIPS... ALLEGAN... MERSON
AND LAWTON... FROM 15 MILES SOUTHWEST OF GRAND RAPIDS TO 15 MILES
SOUTHWEST OF KALAMAZOO. THE SHOWERS AND THUNDERSTORMS WERE MOVING
NORTHEAST AT 30 MPH AND SHOULD REACH U.S. 131... CUTLERVILLE...
SHELBYVILLE AND KALAMAZOO BETWEEN 820 AND 830 PM.

THESE STORMS WILL LIKELY PRODUCE BRIEF HEAVY RAIN... GUSTY WINDS
AND POSSIBLY HAIL. PEOPLE IN THIS AREA ARE URGED TO STAY ALERT FOR
RAPIDLY CHANGING WEATHER. PRACTICE LIGHTNING SAFETY BY MOVING INDOORS
UNTIL THE STORMS PASS.

HENDRICKS
Special weather statement, Apr 12, 8:37 PM EDT, 11 minutes before
MIZ051-056>058-064-065-071-072-130200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
837 PM EDT TUE APR 12 1994

...THUNDERSTORMS DEVELOPING RAPIDLY OVER SOUTHWEST LOWER
MICHIGAN...

AT 837 PM EDT... WEATHER RADAR INDICATED A LINE OF THUNDERSTORMS
BETWEEN GRAND RAPIDS AND KALAMAZOO MOVING NORTHEAST AT 30 MPH.
THE HEAVIEST THUNDERSTORM WAS LOCATED 20 MILES SOUTHWEST OF KALAMAZOO
NEAR MARCELLUS. THIS STORM WILL REACH SCHOOLCRAFT BY 845 PM.

PEA-SIZED TO 1/2 INCH DIAMETER HAIL... DEADLY LIGHTNING... AND WIND
GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS.

DRIVERS ENCOUNTERING THUNDERSTORMS THIS EVENING SHOULD BE AWARE THAT
FLOODING OF LOW LYING AREAS SUCH AS UNDERPASSE@S MAY OCCUR. ALSO
REMEMBER THAT HEAVY RAIN CAN REDUCE VISIBILITIES SIGNIFICANTLY.
WHEN THUNDERSTORMS PASS OVERHEAD... THE INTERIOR OF A STURDY
BUILDING PROVIDES THE BEST PROTECTION AGAINST THE DANGERS OF
LIGHTNING.

HENDRICKS

The office that day

Everything else NWS Grand Rapids, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 9:15 PM EDTSevere Thunderstorm WarningGRRBranch45 min
Apr 12, 10:19 PM EDTSevere Thunderstorm WarningGRRBranch, Hillsdale33 min
Apr 13, 1:10 AM EDTSevere Thunderstorm WarningGRRClinton35 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1994Every severe thunderstorm warning in 1994

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.