Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 298, NWS Twin Cities, MN

August 19, 1998Todd County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 19, 1998, 4:00 PM CDT for Todd County, Minnesota. It was in force for 50 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: Aug 19, 1998, 4:00 PM CDT (21:00 UTC)
Expired: Aug 19, 1998, 4:50 PM CDT
In force: 50 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Todd County, MN

The radar

The Minneapolis radar (KMPX), 171 km from the middle of the area, began a volume at 21:03 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 19, 4:15 PM CDT	Thunderstorm Wind 50	Staples, MN	Trailer blown over. Several large trees blown over. Estimated windspeed.

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 19, 3:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.0 hours before the alert went out and 169 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: 585 J/kg
Mixed-layer CIN: -256 J/kg
Mixed-layer LCL: 475 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 265 m²/s²
0-3 km storm-relative helicity: 317 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

733 
WUUS1 KMSP 192101 RRA
SVRMSP
MNC153-192150-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
400 PM CDT WED AUG 19 1998

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS
ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TODD COUNTY IN CENTRAL MINNESOTA

* UNTIL 450 PM CDT

* AT 355 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE STORMS 30
  MILES NORTHEAST OF ALEXANDRIA TO ALEXANDRIA.  THE STORMS WERE
  MOVING EAST 20 MPH.

* SOME LOCATIONS AFFECTED
    WEST UNION
    LITTLE SAUK
    LONG PRAIRIE

DAMAGING WINDS AND LARGE HAIL ARE LIKELY.  GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.


EDWARDS

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 19, 3:10 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	35 min
Aug 19, 3:44 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope	61 min
Aug 19, 4:08 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	47 min
Aug 19, 5:34 PM CDT	Tornado Warning	MPX	Morrison	31 min
Aug 19, 5:42 PM CDT	Flash Flood Warning	MPX	Pope, Stevens	2 hr
Aug 19, 5:58 PM CDT	Tornado Warning	MPX	Stearns	32 min
Aug 19, 6:30 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	65 min
Aug 19, 6:44 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift	61 min
Aug 19, 6:55 PM CDT	Flash Flood Warning	MPX	Swift	3 hr
Aug 19, 6:58 PM CDT	Tornado Warning	MPX	Stearns	47 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.