Alert archive / Michigan / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 238, NWS Northern Indiana

August 25, 1998Branch County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Aug 25, 1998, 1:58 AM EDT for Branch County, Michigan. It was in force for 52 min. 3 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: Aug 25, 1998, 1:58 AM EDT (05:58 UTC)
Expired: Aug 25, 1998, 2:50 AM EDT
In force: 52 min
Issued by: NWS Northern Indiana
Area: Whole counties

County Branch County, MI

The radar

The Northern Indiana radar (KIWX), 82 km from the middle of the area, began a volume at 06:01 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.

What was reported inside it

Time	Report	Where	Remark
Aug 25, 2:20 AM EDT	Thunderstorm Wind 52	Bronson, MI
Aug 25, 2:30 AM EDT	Thunderstorm Wind	Kinderhook, MI	LOTS OF TREES AND POWER LINES DOWN.
Aug 25, 2:30 AM EDT	Thunderstorm Wind	Batavia, MI	SEVERAL TREES AND POWER LINES DOWN IN TOWN.

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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 25, 1:00 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 6.0 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-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: 1480 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1317 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.6

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 Aug 24, 10:00 PM EDT, 3 hours 58 minutes earlier.

Area forecast discussion, Aug 24, 10:00 PM EDT, 3 hours 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
900 PM EST MON AUG 24 1998

LATEST KIWX RADAR SHOWING NARROW LINE OF SHRA MOVING TOWARD NW CWA.
00Z SFC ANALYSIS PLACES WEAKLY DEFINED FRONT ALONG WHERE THESE SHRA
ARE POPPING UP AND TRAILING BACK THRU S WI AND THEN DOWN THRU E IA.
18Z ETA SHOWING SHORT WAVE MOVING ACROSS THE AREA TONIGHT FROM
N IL AT 06Z TO N IN BY 09Z AND THEN OVER TO NW OH AT 12Z. GOOD
THETAE RIDGE IN PLACE ACROSS OUR AREA AND STRONG UVV FIELD PROGGED
TO MOVE ACROSS 06-12Z AS WELL. 21Z RUC2 ALSO MATCHES UP WITH 18Z ETA
IN PLACING GOOD UVV AND CONVECTIVE PRECIP OVER THE AREA BY 09Z.
WITH THAT IN MIND WILL STICK WITH GOING FCST IN NORTHERN GROUP AS SPC
STILL HAS US IN A SLIGHT RISK ALTHOUGH THE MDT RISK IS SHIFTED BACK
OVER N IL. WILL BACK OFF IN SOUTHERN GROUP TO 50 POP AND REMOVE
ENHANCED WORDING.

JAL

In the hours before

Local storm report, Aug 25, 1:41 AM EDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1241 AM EST TUE AUG 25 1998

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

1238 AM    BENTON CENTER             MI    .75 INCH HAIL
08/25/98   BERRIEN                         HAM REPORT

Local storm report, Aug 25, 1:45 AM EDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT...CORR TO LOCATION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1241 AM EST TUE AUG 25 1998

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

1238 AM    BENTON HARBOR             MI    .75 INCH HAIL
08/25/98   BERRIEN                         HAM REPORT

Local storm report, Aug 25, 1:50 AM EDT, 8 minutes before

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Local storm report, Aug 25, 1:50 AM EDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1250 AM EST TUE AUG 25 1998

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

1248 AM    COLOMA                    MI    FLOOD
08/25/98   BERRIEN                         WATER UP TO BOTTOM OF
                                           CAR DOORS

Local storm report, Aug 25, 1:54 AM EDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1254 AM EST TUE AUG 25 1998

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

1252 AM    ST JOSEPH                 MI    1.75 INCH HAIL
08/25/98   BERRIEN                         SPOTTER REPORT

Local storm report, Aug 25, 1:54 AM EDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1254 AM EST TUE AUG 25 1998

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

1252 AM    ST JOSEPH                 MI    1.75 INCH HAIL
08/25/98   BERRIEN                         SPOTTER REPORT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 2:07 AM EDT	Tornado Warning	IWX	Elkhart, Saint Joseph	48 min
Aug 25, 2:26 AM EDT	Tornado Warning	IWX	LaGrange	49 min
Aug 25, 2:31 AM EDT	Tornado Warning	IWX	Elkhart	34 min
Aug 25, 2:52 AM EDT	Severe Thunderstorm Warning	IWX	Steuben	53 min
Aug 25, 2:58 AM EDT	Severe Thunderstorm Warning	IWX	DeKalb, Noble	47 min
Aug 25, 3:22 AM EDT	Severe Thunderstorm Warning	IWX	LaPorte	48 min
Aug 25, 3:05 AM EDT	Severe Thunderstorm Warning	IWX	Williams	50 min
Aug 25, 3:24 AM EDT	Severe Thunderstorm Warning	IWX	Fulton	51 min
Aug 25, 3:33 AM EDT	Severe Thunderstorm Warning	IWX	Defiance	47 min
Aug 25, 3:43 AM EDT	Severe Thunderstorm Warning	IWX	Henry	47 min
Aug 25, 1:12 AM EDT	Severe Thunderstorm Warning	IWX	Berrien	48 min
Aug 25, 1:19 AM EDT	Severe Thunderstorm Warning	IWX	Cass	61 min
Aug 25, 1:33 AM EDT	Severe Thunderstorm Warning	IWX	Saint Joseph	52 min
Aug 25, 1:47 AM EDT	Tornado Warning	IWX	Berrien, Cass	48 min
Aug 25, 2:17 AM EDT	Tornado Warning	IWX	Branch	48 min
Aug 25, 2:22 AM EDT	Severe Thunderstorm Warning	IWX	Saint Joseph	33 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; radar from the NEXRAD Level II archive.