Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 162, NWS Twin Cities, MN

July 19, 1997Stearns County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 19, 1997, 2:34 AM CDT for Stearns County, Minnesota. It was in force for 66 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 19, 1997, 2:34 AM CDT (07:34 UTC)
Expired
Jul 19, 1997, 3:40 AM CDT
In force
66 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Stearns County, MN

The radar

The Minneapolis radar (KMPX), 113 km from the middle of the area, began a volume at 07:36 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.6 hours before the alert went out and 111 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1997-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 538 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1997-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -37 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
538 J/kg
Mixed-layer CIN
-203 J/kg
Mixed-layer LCL
1282 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-37 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 190735 RRA
SVRMSP
MNC145-190840-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
234 AM CDT SAT JUL 19 1997

* SEVERE THUNDERSTORM WARNING FOR
  STEARNS COUNTY - CENTRAL MINNESOTA

* UNTIL 340 AM CDT
 
* SOME LOCATIONS AFFECTED
    ST. ROSA
    FREEPORT
    ST. ANTHONY
    ALBANY

* AT 233 AM DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE HAIL
  JUST WEST ST. ROSA OR 30 NORTHWEST OF ST. CLOUD.  THE STORM WAS
  MOVING SOUTHEAST AT 5 MPH.

THIS IS A DANGEROUS STORM...WITH LARGE HAIL.  STAY INDOORS AWAY
FROM WINDOWS.


HOWIESON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 6:27 AM CDTSevere Thunderstorm WarningMPXTodd48 min
Jul 19, 8:09 AM CDTSevere Thunderstorm WarningMPXWright51 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997Every 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.