Alert archive / Michigan / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 38, NWS Detroit, MI

July 14, 1997Shiawassee County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 14, 1997, 6:54 PM EDT for Shiawassee County, Michigan. It was in force for 51 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
Jul 14, 1997, 6:54 PM EDT (22:54 UTC)
Expired
Jul 14, 1997, 7:45 PM EDT
In force
51 min
Issued by
NWS Detroit, MI
Area
Whole counties

County Shiawassee County, MI

The radar

The Detroit radar (KDTX), 62 km from the middle of the area, began a volume at 22:54 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 14, 3:45 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.9 hours before the alert went out and 64 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 12:00Z on 1997-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1404 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 1997-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -73 square meters per square second.1939Sfc1 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
1404 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
903 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-73 m²/s²
0-3 km storm-relative helicity
-47 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, Jul 14, 4:45 PM EDT, 2 hours 9 minutes before
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Special weather statement, Jul 14, 4:48 PM EDT, 2 hours 6 minutes before
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Special weather statement, Jul 14, 4:55 PM EDT, 1 hour 59 minutes before
MIZ047-048-053-060-142130-

SPECIAL WEATHER STATEMENT...CORRECTION
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
445 PM EDT MON JUL 14 1997

...SEVERE THUNDERSTORM WATCH #605 IN EFFECT UNTIL 10 PM EDT FOR BAY...
MIDLAND...SAGINAW AND SHIAWASSEE COUNTIES...

AT 440 PM A LINE OF STRONG TO SEVERE THUNDERSTORMS EXTENDED SOUTHWEST
FROM ALLEGAN COUNTY...WHICH IS JUST SOUTHWEST OF GRAND RAPIDS...INTO
INDIANA.  THIS LINE OF STORMS WAS MOVING TO THE NORTHEAST AT 30 MILES
PER HOUR AND SHOULD BEGIN TO AFFECT MIDLAND...SAGINAW AND SHIAWASSEE
COUNTIES BY 630 PM AND BAY COUNTY BY 7 PM.  THERE WAS AN ISOLATED
THUNDERSTORM OVER NORTHERN MONTCALM COUNTY THAT COULD AFFECT MIDLAND
COUNTY BY 530 PM.  THIS STORM WAS NOT SEVERE AS OF 440 PM.

SOME THUNDERSTORMS THIS EVENING COULD PRODUCE ONE AND THREE QUARTER
INCH SIZE HAIL AND WIND GUSTS TO 70 MPH.

PERSONS IN THE WATCH AREA SHOULD KEEP ALERT TO FURTHER WEATHER
STATEMENTS AND POSSIBLE WARNINGS AND BE PREPARED TO TAKE COVER IF
NECESSARY.

DRC
Special weather statement, Jul 14, 6:00 PM EDT, 54 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-142130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
6 PM EDT MON JUL 14 1997

...SEVERE THUNDERSTORM WATCH 605 IN EFFECT UNTIL 10 PM EDT FOR ALL OF
SOUTHEAST LOWER MICHIGAN...

AT 555 PM...WEATHER SERVICE RADAR INDICATED A LINE OF STRONG TO SEVERE
THUNDERSTORMS FROM HOWARD CITY...WHICH IS NORTH OF GRAND RAPIDS...EAST
TO INONIA AND THEN SOUTHWEST THROUGH BATTLE CREEK AND KALAMAZOO INTO
INDIANA.  THE LINE OF STORMS WAS MOVING EAST AT 20 MPH WHILE THE
INDIVIDUAL STORMS MOVED NORTHEAST AT 30 MPH.

THESE STORMS SHOULD REACH OWOSSO...HOWELL AND ANN ARBOR AROUND 7 PM AND
THE TRI-CITIES...FLINT...PONTIAC AND DETROIT BY 8 PM.

THESE STORMS CAN PRODUCE THREE QUARTER INCH SIZE HAIL...WIND GUSTS TO
70 MPH AND TORRENTIAL RAIN.

SOME OF THESE STORMS HAVE A HISTORY OF DOWNING TREES AND POWERLINES IN
SOUTHWESTERN LOWER MICHIGAN ALONG WITH TORRENTIAL RAIN.

OTHER SCATTERED STRONG THUNDESTORMS WERE OCCURRING ACROSS THE THUMB
AREA. THESE STORMS WERE MOVING NORTHEAST AT 20 MPH AND WERE PRODUCING
HEAVY RAIN AND WIND GUSTS TO 40 MPH.

PERSONS IN THE WATCH AREA SHOULD KEEP ALERT FOR FURTHER WEATHER
STATEMENTS AND POSSIBLE WARNINGS AND BE PREPARED TO TAKE COVER IF
NECESSARY.

DRC
Special weather statement, Jul 14, 6:04 PM EDT, 50 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-142130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
6 PM EDT MON JUL 14 1997

...SEVERE THUNDERSTORM WATCH #605 IN EFFECT UNTIL 10 PM EDT FOR ALL OF
SOUTHEAST LOWER MICHIGAN...

AT 555 PM...WEATHER SERVICE RADAR INDICATED A LINE OF STRONG TO SEVERE
THUNDERSTORMS FROM HOWARD CITY...WHICH IS NORTH OF GRAND RAPIDS...EAST
TO INONIA AND THEN SOUTHWEST THROUGH BATTLE CREEK AND KALAMAZOO INTO
INDIANA.  THE LINE OF STORMS WAS MOVING EAST AT 20 MPH WHILE THE
INDIVIDUAL STORMS MOVED NORTHEAST AT 30 MPH.

THESE STORMS SHOULD REACH OWOSSO...HOWELL AND ANN ARBOR AROUND 7 PM AND
THE TRI-CITIES...FLINT...PONTIAC AND DETROIT BY 8 PM.

THESE STORMS CAN PRODUCE THREE QUARTER INCH SIZE HAIL...WIND GUSTS TO
70 MPH AND TORRENTIAL RAIN.

SOME OF THESE STORMS HAVE A HISTORY OF DOWNING TREES AND POWERLINES IN
SOUTHWESTERN LOWER MICHIGAN ALONG WITH TORRENTIAL RAIN.

OTHER SCATTERED STRONG THUNDESTORMS WERE OCCURRING ACROSS THE THUMB
AREA. THESE STORMS WERE MOVING NORTHEAST AT 20 MPH AND WERE PRODUCING
HEAVY RAIN AND WIND GUSTS TO 40 MPH.

PERSONS IN THE WATCH AREA SHOULD KEEP ALERT FOR FURTHER WEATHER
STATEMENTS AND POSSIBLE WARNINGS AND BE PREPARED TO TAKE COVER IF
NECESSARY.

DRC
Special weather statement, Jul 14, 6:11 PM EDT, 43 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-142300-

SPECIAL WEATHER STATEMENT...CORRECTION TO EXIPRATION TIME
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
6 PM EDT MON JUL 14 1997

...SEVERE THUNDERSTORM WATCH #605 IN EFFECT UNTIL 10 PM EDT FOR ALL OF
SOUTHEAST LOWER MICHIGAN...

AT 555 PM...WEATHER SERVICE RADAR INDICATED A LINE OF STRONG TO SEVERE
THUNDERSTORMS FROM HOWARD CITY...WHICH IS NORTH OF GRAND RAPIDS...EAST
TO INONIA AND THEN SOUTHWEST THROUGH BATTLE CREEK AND KALAMAZOO INTO
INDIANA.  THE LINE OF STORMS WAS MOVING EAST AT 20 MPH WHILE THE
INDIVIDUAL STORMS MOVED NORTHEAST AT 30 MPH.

THESE STORMS SHOULD REACH OWOSSO...HOWELL AND ANN ARBOR AROUND 7 PM AND
THE TRI-CITIES...FLINT...PONTIAC AND DETROIT BY 8 PM.

THESE STORMS CAN PRODUCE THREE QUARTER INCH SIZE HAIL...WIND GUSTS TO
70 MPH AND TORRENTIAL RAIN.

SOME OF THESE STORMS HAVE A HISTORY OF DOWNING TREES AND POWERLINES IN
SOUTHWESTERN LOWER MICHIGAN ALONG WITH TORRENTIAL RAIN.

OTHER SCATTERED STRONG THUNDESTORMS WERE OCCURRING ACROSS THE THUMB
AREA. THESE STORMS WERE MOVING NORTHEAST AT 20 MPH AND WERE PRODUCING
HEAVY RAIN AND WIND GUSTS TO 40 MPH.

PERSONS IN THE WATCH AREA SHOULD KEEP ALERT FOR FURTHER WEATHER
STATEMENTS AND POSSIBLE WARNINGS AND BE PREPARED TO TAKE COVER IF
NECESSARY.

DRC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 7:05 PM EDTSevere Thunderstorm WarningDTXMidland, Saginaw55 min
Jul 14, 7:25 PM EDTSevere Thunderstorm WarningDTXBay50 min
Jul 14, 7:52 PM EDTSevere Thunderstorm WarningDTXMacomb38 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1997Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.