Alert archive / Minnesota / Tornado Warnings in 1998

Tornado Warning 59, NWS Twin Cities, MN

September 26, 1998Isanti County, Kanabec County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Sep 26, 1998, 12:12 AM CDT for Isanti County, Kanabec County, Minnesota. It was in force for 33 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: Sep 26, 1998, 12:12 AM CDT (05:12 UTC)
Expired: Sep 26, 1998, 12:45 AM CDT
In force: 33 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Isanti County, MN, Kanabec County, MN

The radar

The Minneapolis radar (KMPX), 103 km from the middle of the area, began a volume at 05:14 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
Sep 26, 12:15 AM CDT	Thunderstorm Wind 50	Mora, MN	Large tree blown down. Many windows shattered. Estimated windspeed.
Sep 26, 12:20 AM CDT	Thunderstorm Wind 60	Grasston, MN	Sheds destroyed. Storage building at Bremix Concrete destroyed. Power poles and trees blown down. Portion of roof ripped off farmhouse. 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
Sep 26, 12:00 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.2 hours before the alert went out and 103 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1859 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 247 m²/s²
0-3 km storm-relative helicity: 276 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

062 
WFUS1 KMSP 260514 RRA
TORMSP
MNC059-065-260545-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1212 AM CDT SAT SEP 26 1998

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

* TORNADO WARNING FOR...
  ISANTI COUNTY IN EAST CENTRAL MINNESOTA
  KANABEC COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 1245 AM CDT

* AT 1212 AM CDT...DOPPLER RADAR DETECTED A POSSIBLE TORNADO 14
  MILES NORTHEAST OF MILACA OR 38 MILES NORTHEAST OF ST CLOUD.  THE
  STORM WAS MOVING EAST AT 35 MPH.

* SOME LOCATIONS AFFECTED
    OLGOVIE
    MORA

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

CWS

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 25, 10:20 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	65 min
Sep 25, 10:59 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	61 min
Sep 25, 11:48 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs	62 min
Sep 26, 12:26 AM CDT	Severe Thunderstorm Warning	MPX	Chisago	34 min

Nearby

Tornado Warnings in Minnesota, 1998 Every tornado warning in 1998 Tornadoes 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.