Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 110, NWS Aberdeen, SD

July 18, 1998Traverse County, Minnesota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 18, 1998, 11:00 AM CDT for Traverse County, Minnesota. It was in force for 60 min. 1 report 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 18, 1998, 11:00 AM CDT (16:00 UTC)
Expired: Jul 18, 1998, 12:00 PM CDT
In force: 60 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Traverse County, MN

The radar

The Aberdeen radar (KABR), 155 km from the middle of the area, began a volume at 15:59 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
Jul 18, 11:30 AM CDT	Hail 1.75	Wheaton, MN

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

Aberdeen, SD (KABR), launched 12:00Z, 4.0 hours before the alert went out and 179 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: 1629 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 970 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

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 Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 9:55 AM CDT, 1 hour 5 minutes earlier.

Area forecast discussion, Jul 18, 9:55 AM CDT, 1 hour 5 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
955 AM CDT SAT JUL 18 1998

HAVE UPDATED ENTIRE CWA...MAINLY TO ACCOUNT FOR SEVERE TSTMS
APPROACHING FAR NE SD AND WC MINN. ELSEWHERE...TOUCHED UP WINDS
A BIT.

.ABR...NONE

MIDDLEBROOKE

In the hours before

Special weather statement, Jul 18, 10:35 AM CDT, 25 minutes before

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The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 18, 10:18 AM CDT	Severe Thunderstorm Warning	ABR	Roberts	32 min
Jul 18, 5:50 PM CDT	Severe Thunderstorm Warning	ABR	Hyde, Potter, Sully	55 min
Jul 18, 5:53 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Stanley	62 min
Jul 18, 6:04 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds	66 min
Jul 18, 6:10 PM CDT	Tornado Warning	ABR	Hand	65 min
Jul 18, 6:28 PM CDT	Severe Thunderstorm Warning	ABR	Faulk	47 min
Jul 18, 6:45 PM CDT	Severe Thunderstorm Warning	ABR	Spink	65 min
Jul 18, 6:59 PM CDT	Tornado Warning	ABR	Spink	66 min
Jul 18, 10:12 AM CDT	Severe Thunderstorm Warning	ABR	Traverse	48 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.