Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 268, NWS Twin Cities, MN

July 14, 1998Douglas County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 14, 1998, 7:09 PM CDT for Douglas County, Minnesota. It was in force for 31 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 14, 1998, 7:09 PM CDT (00:09 UTC)
Expired: Jul 14, 1998, 7:40 PM CDT
In force: 31 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 190 km from the middle of the area, began a volume at 00:09 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 14, 7:15 PM CDT	Thunderstorm Wind 50	Forada, MN	Trees blown down. 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
Jul 14, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.2 hours before the alert went out and 188 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: 2121 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1376 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 150009 RRA
SVRMSP
MNC041-150040-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
709 PM CDT TUE JUL 14 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 740 PM CDT

* AT 708 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL JUST SOUTHWEST OF ALEXANDRIA.  THE STORM WAS MOVING
  SOUTHEAST AT 20 MPH.

* SOME LOCATIONS AFFECTED
    FORADA
    LAKE MARY
    RURAL AREAS IN SOUTHERN DOUGLAS COUNTY

THIS IS A DANGEROUS STORM.  STAY INDOORS AWAY FROM WINDOWS.


JMP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 7:05 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Stearns, Todd	60 min
Jul 14, 7:39 PM CDT	Severe Thunderstorm Warning	MPX	Stevens	61 min
Jul 14, 8:05 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Swift	60 min
Jul 14, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle	61 min
Jul 14, 8:47 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	48 min
Jul 14, 9:26 PM CDT	Tornado Warning	MPX	Kandiyohi, Renville	34 min
Jul 14, 9:53 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	62 min
Jul 14, 10:01 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville, Yellow Medicine	64 min
Jul 14, 10:20 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Dakota, Scott	60 min
Jul 14, 10:20 PM CDT	Severe Thunderstorm Warning	MPX	Ramsey, Washington	60 min
Jul 14, 10:54 PM CDT	Severe Thunderstorm Warning	MPX	Brown	61 min
Jul 15, 12:43 AM CDT	Severe Thunderstorm Warning	MPX	Freeborn	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.