Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 130, NWS Twin Cities, MN

July 13, 1997Dakota County, Hennepin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 13, 1997, 8:31 PM CDT for Dakota County, Hennepin County, Minnesota. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 13, 1997, 8:31 PM CDT (01:31 UTC)
Expired: Jul 13, 1997, 9:15 PM CDT
In force: 44 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Dakota County, MN, Hennepin County, MN

The radar

The Minneapolis radar (KMPX), 23 km from the middle of the area, began a volume at 01:31 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.

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 13, 7:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.5 hours before the alert went out and 404 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: 343 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1829 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 140132 RRA
SVRMSP
MNC037-053-140215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
831 PM CDT SUN JUL 13 1997

* SEVERE THUNDERSTORM WARNING FOR
  DAKOTA COUNTY - EAST CENTRAL MINNESOTA
  EASTERN HENNEPIN COUNTY - EAST CENTRAL MINNESOTA

* UNTIL 915 PM CDT
 
* SOME LOCATIONS AFFECTED
    MINNEAPOLIS
    INVER GROVE HEIGHTS
    HASTINGS

* AT 830 PM CDT DOPPLER RADAR INDICATED A LINE OFb SEVERE STORMS
  FROM MINNEAPOLIS TO FARMINGTON.  THE STORMS WERE MOVING EAST AT
  45 MPH.

THESE ARE DANGEROUS STORMS...WITH DAMAGING WINDS.  STAY
INDOORS AWAY FROM WINDOWS.


MILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 7:38 PM CDT	Severe Thunderstorm Warning	MPX	Scott	52 min
Jul 13, 7:46 PM CDT	Tornado Warning	MPX	Scott, Sibley	29 min
Jul 13, 7:48 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin	42 min
Jul 13, 7:48 PM CDT	Severe Thunderstorm Warning	MPX	Carver	42 min
Jul 13, 8:17 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Ramsey, Washington	58 min
Jul 13, 8:21 PM CDT	Severe Thunderstorm Warning	MPX	Rice, Steele, Waseca	59 min
Jul 13, 8:21 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn	59 min
Jul 13, 9:11 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	49 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997 Every severe thunderstorm warning in 1997

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.