Alert archive / Michigan / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 169, NWS Northern Indiana

July 21, 1998Berrien County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Jul 21, 1998, 7:56 PM EDT for Berrien County, Michigan. It was in force for 49 min. 2 reports 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: Jul 21, 1998, 7:56 PM EDT (23:56 UTC)
Expired: Jul 21, 1998, 8:45 PM EDT
In force: 49 min
Issued by: NWS Northern Indiana
Area: Whole counties

County Berrien County, MI

What was reported inside it

Time	Report	Where	Remark
Jul 21, 8:10 PM EDT	Hail 0.75	Bridgman, MI	SHERIFF REPORT.
Jul 21, 8:10 PM EDT	Hail 0.75	Sawyer, 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.9 hours before the alert went out and 262 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: 27 J/kg
Mixed-layer CIN: -328 J/kg
Mixed-layer LCL: 2116 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 130 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.

NWS Northern Indiana wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 2:25 PM EDT, 5 hours 31 minutes earlier.

Area forecast discussion, Jul 21, 2:25 PM EDT, 5 hours 31 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
125 PM EST TUE JUL 21 1998

FORECAST CONCERNS ARE PRECIP CHANCES AND SEVERE WEATHER THREAT THROUGH
THE FORECAST PERIOD.

KLOT RADAR CURRENTLY SHOWING A SLOWLY INTENSIFYING LINE OF STORMS
ACROSS NORTHERN ILLINOIS AND SOUTHERN WISCONSIN.  KLOT RADAR SHOWING
WEAK REFLECTIVITIES INCREASING ALONG THE SOUTHERN END OF THE LINE..
INDICATING ADDITIONAL DEVELOPMENT.

WOULD LIKE MENTION OF SCATTERED STORMS AND SEVERE WORDING FOR ENTIRE
AREA THIS EVENING.  HIGH CAPE VALUES ACROSS THE AREA AT TIME.. AND KIWX
VWP SHOWING PROFILE FAVORABLE FOR DAMAGING WINDS.

ETA/NGM MODELS BECOMING A BIT MORE CONSISTENT.. THOUGH HAVE SOME
RESERVATIONS STILL WITH DETAILS.  BOTH MODELS INDICATE FRONTAL BOUNDARY
CURRENTLY TO THE NORTH BECOMING STATIONARY ACROSS NORTHERN INDIANA.
MOISTURE POOLING ALONG THE FRONT AS PW VALUES INCREASE TO NEARLY 2
INCHES BY TOMORROW AFTERNOON.  FRONTOGENESIS PROGS... LOW LEVEL MOISTURE
FIELDS... AND MID LEVEL THICKNESSES INDICATE SERIES OF CONVECTIVE
SYSTEMS PLAGUING OUR AREA THROUGH 48 HOURS.  MCS DEVELOPMENT LIKELY
LATER TONIGHT OUT TO THE WEST.. WITH ACTIVITY WORKING INTO AREA AROUND
DAYBREAK.  DEVELOPMENT ALSO POSSIBLE TOMORROW AFTERNOON AS AMS BECOMES
UNSTABLE ONCE AGAIN. WOULD RECOMMEND LIKELY POPS TONIGHT/TOMORROW..
WITH GOOD CHANCE POPS IN LATER PERIODS. HEAVY RAINFALL MAY BECOME A
PROBLEM TOMORROW OR TOMORROW NIGHT... BUT THIS CAN WAIT UNTIL LATER
FORECASTS TO BE ADDRESSED.

RECOMMEND TEMPS TOMORROW A BIT HIGHER THAN FWC/FAN GUIDANCE... AS MOST
OF CWA SHOULD BE ALONG OR SOUTH OF SURFACE FRONT.  GUIDANCE TEMPS FOR
OTHER PERIODS SHOULD BE FINE.

SBN 072/089 069/080 060 09665
FWA 073/090 070/083 062 09565
AOH 074/090 072/084 062 09455

.IWX...NONE.

MARGRAF!

In the hours before

Local storm report, Jul 21, 6:07 PM EDT, 1 hour 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
507 PM EST TUE JUL 21 1998

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

0425 PM    COLDWATER                 MI    WIND DAMAGE
07/21/98   BRANCH                          TREES DOWN

0435 PM    5 ESE COLDWATER           MI    .75 INCH HAIL
07/21/98   BRANCH                          HAM REPORT

0435 PM    LITCHFIELD                MI    WIND DAMAGE
07/21/98   HILLSDALE                       TREES AND POWER LINES
                                           DOWN

Local storm report, Jul 21, 6:07 PM EDT, 1 hour 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
507 PM EST TUE JUL 21 1998

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

0425 PM    COLDWATER                 MI    WIND DAMAGE
07/21/98   BRANCH                          TREES DOWN

0435 PM    5 ESE COLDWATER           MI    .75 INCH HAIL
07/21/98   BRANCH                          HAM REPORT

0435 PM    LITCHFIELD                MI    WIND DAMAGE
07/21/98   HILLSDALE                       TREES AND POWER LINES
                                           DOWN

Local storm report, Jul 21, 7:38 PM EDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
638 PM EST TUE JUL 21 1998

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

0636 PM    CENTREVILLE               MI    1.75 INCH HAIL
07/21/98   ST.JOSEPH

Local storm report, Jul 21, 7:38 PM EDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
638 PM EST TUE JUL 21 1998

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

0636 PM    CENTREVILLE               MI    1.75 INCH HAIL
07/21/98   ST.JOSEPH

Local storm report, Jul 21, 7:39 PM EDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTION...
NATIONAL WEATHER SERVICE NORTHERN INDIANA
639 PM EST TUE JUL 21 1998

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

0636 PM    COLDWATER                 MI    1.75 INCH HAIL
07/21/98   BRANCH

Local storm report, Jul 21, 7:39 PM EDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTION...
NATIONAL WEATHER SERVICE NORTHERN INDIANA
639 PM EST TUE JUL 21 1998

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

0636 PM    COLDWATER                 MI    1.75 INCH HAIL
07/21/98   BRANCH

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 5:40 PM EDT	Severe Thunderstorm Warning	IWX	LaGrange, Steuben	50 min
Jul 21, 7:54 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Saint Joseph	51 min
Jul 21, 6:05 AM EDT	Severe Thunderstorm Warning	IWX	Fulton, Williams	50 min
Jul 21, 6:27 AM EDT	Severe Thunderstorm Warning	IWX	Henry	48 min
Jul 20, 11:46 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	34 min
Jul 21, 5:23 AM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	47 min
Jul 21, 5:45 AM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	45 min
Jul 21, 7:18 AM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	32 min
Jul 21, 5:18 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	47 min
Jul 21, 7:17 PM EDT	Severe Thunderstorm Warning	IWX	Branch	48 min
Jul 21, 7:43 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	47 min
Jul 21, 7:47 PM EDT	Severe Thunderstorm Warning	IWX	Saint Joseph	48 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.