Alert archive / Michigan / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 7, NWS Marquette, MI

March 29, 1998Alger County, Schoolcraft County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Mar 29, 1998, 11:32 PM EST for Alger County, Schoolcraft County, Michigan. It was in force for 63 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: Mar 29, 1998, 11:32 PM EST (04:32 UTC)
Expired: Mar 30, 1998, 12:35 AM EST
In force: 63 min
Issued by: NWS Marquette, MI
Area: Whole counties

Counties Alger County, MI, Schoolcraft County, MI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.5 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 602 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 602 m²/s²
0-3 km storm-relative helicity: 864 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.9

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.

NWS Marquette, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 29, 12:05 PM EST, 11 hours 27 minutes earlier.

Area forecast discussion, Mar 29, 12:05 PM EST, 11 hours 27 minutes before

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE MARQUETTE MI
1205 PM EST SUN MAR 29 1998

STRONG TO SEVERE THUNDERSTORMS FORMING OVER CENTRAL WI. TOPS ARE
BEGINNING TO SHOW SIGNS OF WARMING ON THE LAST COUPLE OF IMAGES.
CONVERGENCE FROM THE NOSE OF LLJ SETTING OFF CONVECTION.  WARM FRONT
IS STILL MUCH FURTHER SOUTH.  ETA CAPE FIELDS DO NOT SHOW ANYTHING,
PROBABLY NOT PICKING UP ON INSTABILITY ALOFT.  ETA QG FRONTOGENESIS
AND MID LEVEL Q-VECTOR CONVERGENCE FIELD IS STRONGEST TO THE WEST
OF THE REGION.  THE STRONGEST DIFFERENTIAL DIVERGENCE IS OVER THE
U.P. HOWEVER.  BOTH THE NOSE OF THE H85 JET AND COUPLED UPPER JETS
STACK OVER THE U.P. DURING THE EVENING. MODELS SOUNDING INDICATE
BEST MOISTURE FOR THE U.P. WILL BE LATE THIS AFTERNOON.
AS ALLUDED ABOVE, BEST DYNAMICS WILL BE THIS EVENING THOUGH. EVEN
THOUGH MORE INSTABILITY WOULD BE DESIRABLE FOR SEVERE WEATHER, THE
WINDS FIELDS AT BOTH LOW AND UPPER LEVELS ARE TOO HARD TO IGNORE.
SLIGHT RISK FOR THIS EVENING IS WELL WARRANTED.

DID NOT MAKE MAJOR CHANGES TO ZONES.  DID TWEAK TEMPS UP A TOUCH
AND ADDED THUNDER TO THE WI BORDER ZONES.

KFM

In the hours before

Local storm report, Mar 29, 5:40 PM EST, 5 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MARQUETTE MI
540 PM EST SUN MAR 29 1998

TIME(EST)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0535 PM    NORWAY                    MI   .75 INCH HAIL
03/29/98   DICKINSON

GFF

Local storm report, Mar 29, 5:43 PM EST, 5 hours 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MARQUETTE MI
543 PM EST SUN MAR 29 1998

TIME(EST)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0541 PM    STONINGTON                MI   .75 INCH HAIL
03/29/98   DELTA

GFF

Special weather statement, Mar 29, 8:45 PM EST, 2 hours 47 minutes before

MIZ011>013-300800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  MARQUETTE MI
845 PM EST SUN MAR 29 1998

...TORNADO WATCH IS IN EFFECT FOR DICKINSON...MENOMINEE AND DELTA
COUNTIES UNTIL 300 AM EST/200 AM CST...

A TORNADO WATCH IS IN EFFECT FOR SOUTH CENTRAL UPPER MICHIGAN UNTIL 300
AM EST/200 AM CST. THE WATCH INCLUDES DICKINSON... MENOMINEE AND DELTA
COUNTIES AND THE COMMUNITIES OF IRON MOUNTAIN... MENOMINEE AND ESCANABA.
THE WATCH ALSO INCLUDES ADJACENT WATERS OF LAKE MICHIGAN.

AT 845 PM EST... DOPPLER RADAR SHOWED STRONG THUNDERSTORMS OVER NORTH
CENTRAL WISCONSIN. THE STORMS WERE MOVING EAST AT 40 MILES AN HOUR AND
WILL REACH IRON MOUNTAIN AROUND 1000 PM EST/900 PM CST.

A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADOES AND
SEVERE THUNDERSTORMS IN AND NEAR THE WATCH AREA. BE ALERT FOR
THREATENING WEATHER CONDITIONS AND STAY TUNED FOR LATER STATEMENTS AND
POSSIBLE WARNINGS.

GFF

Special weather statement, Mar 29, 8:45 PM EST, 2 hours 47 minutes before

MIZ011>013-300800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  MARQUETTE MI
845 PM EST SUN MAR 29 1998

...TORNADO WATCH IS IN EFFECT FOR DICKINSON...MENOMINEE AND DELTA
COUNTIES UNTIL 300 AM EST/200 AM CST...

A TORNADO WATCH IS IN EFFECT FOR SOUTH CENTRAL UPPER MICHIGAN UNTIL 300
AM EST/200 AM CST. THE WATCH INCLUDES DICKINSON... MENOMINEE AND DELTA
COUNTIES AND THE COMMUNITIES OF IRON MOUNTAIN... MENOMINEE AND ESCANABA.
THE WATCH ALSO INCLUDES ADJACENT WATERS OF LAKE MICHIGAN.

AT 845 PM EST... DOPPLER RADAR SHOWED STRONG THUNDERSTORMS OVER NORTH
CENTRAL WISCONSIN. THE STORMS WERE MOVING EAST AT 40 MILES AN HOUR AND
WILL REACH IRON MOUNTAIN AROUND 1000 PM EST/900 PM CST.

A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADOES AND
SEVERE THUNDERSTORMS IN AND NEAR THE WATCH AREA. BE ALERT FOR
THREATENING WEATHER CONDITIONS AND STAY TUNED FOR LATER STATEMENTS AND
POSSIBLE WARNINGS.

GFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 10:36 PM EST	Severe Thunderstorm Warning	MQT	Dickinson	64 min
Mar 29, 10:42 PM EST	Tornado Warning	MQT	Dickinson	48 min
Mar 29, 10:50 PM EST	Tornado Warning	MQT	Marquette	45 min
Mar 29, 11:02 PM EST	Tornado Warning	MQT	Delta	48 min
Mar 29, 11:16 PM EST	Severe Thunderstorm Warning	MQT	Alger	34 min
Mar 30, 12:03 AM EST	Severe Thunderstorm Warning	MQT	Luce	47 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1998 Every severe thunderstorm warning in 1998

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.