Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 2, NWS Twin Cities, MN

March 29, 1998Nicollet County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Mar 29, 1998, 2:27 PM CST for Nicollet County, Sibley County, Minnesota. It was in force for 48 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: Mar 29, 1998, 2:27 PM CST (20:27 UTC)
Expired: Mar 29, 1998, 3:15 PM CST
In force: 48 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Nicollet County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 68 km from the middle of the area, began a volume at 20:29 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
Mar 29, 2:45 PM CST	Hail 1.5	Arlington, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Mar 29, 2:00 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 66 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: 551 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 251 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.

210 
WUUS1 KMSP 292028 RRA
SVRMSP
MNC103-143-292115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
227 PM CST SUN MAR 29 1998


* SEVERE THUNDERSTORM WARNING FOR
  NICOLLET COUNTY - SOUTH CENTRAL MINNESOTA
  SIBLEY COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 315 PM CST

* SOME LOCATIONS AFFECTED
    GAYLORD
    ARLINGTON
    HENDERSON
    NEW SWEDEN

* AT 227 PM CST DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL AND DAMAGING WINDS 20 MILES NORTHWEST OF MANKATO.  THE STORM
  WAS MOVING NORTHEAST AT 35 MPH.

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

A TORNADO WATCH IS IN EFFECT.  SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES.

MILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 2:43 PM CST	Severe Thunderstorm Warning	MPX	McLeod, Meeker, Wright	47 min
Mar 29, 2:47 PM CST	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	48 min
Mar 29, 2:52 PM CST	Severe Thunderstorm Warning	MPX	Carver	48 min
Mar 29, 2:52 PM CST	Tornado Warning	MPX	Scott	38 min
Mar 29, 3:00 PM CST	Tornado Warning	MPX	Freeborn	35 min
Mar 29, 3:07 PM CST	Severe Thunderstorm Warning	MPX	Wright	33 min
Mar 29, 3:12 PM CST	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Ramsey	63 min
Mar 29, 3:12 PM CST	Severe Thunderstorm Warning	MPX	Anoka	63 min
Mar 29, 3:18 PM CST	Severe Thunderstorm Warning	MPX	Anoka, Sherburne	42 min
Mar 29, 3:23 PM CST	Severe Thunderstorm Warning	MPX	Freeborn, Steele	37 min
Mar 29, 3:32 PM CST	Severe Thunderstorm Warning	MPX	Dakota, Washington	63 min
Mar 29, 3:32 PM CST	Severe Thunderstorm Warning	MPX	Goodhue	63 min
Mar 29, 3:39 PM CST	Severe Thunderstorm Warning	MPX	Carver, Sibley	36 min
Mar 29, 3:43 PM CST	Severe Thunderstorm Warning	MPX	Chisago, Isanti	47 min
Mar 29, 4:21 PM CST	Tornado Warning	MPX	Brown, Watonwan	64 min
Mar 29, 4:28 PM CST	Severe Thunderstorm Warning	MPX	Scott	47 min
Mar 29, 4:56 PM CST	Tornado Warning	MPX	Blue Earth, Nicollet	59 min
Mar 29, 5:23 PM CST	Tornado Warning	MPX	Le Sueur	52 min
Mar 29, 5:47 PM CST	Tornado Warning	MPX	Blue Earth, Nicollet	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.