Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 134, NWS Twin Cities, MN

July 18, 1996Chippewa County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 18, 1996, 12:47 AM CDT for Chippewa County, Swift County, Minnesota. It was in force for 43 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 18, 1996, 12:47 AM CDT (05:47 UTC)
Expired
Jul 18, 1996, 1:30 AM CDT
In force
43 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Chippewa County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 165 km from the middle of the area, began a volume at 05:49 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

TimeReportWhereRemark
Jul 18, 1:00 AM CDTThunderstorm Wind 60Big Bend City, 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.8 hours before the alert went out and 163 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 1996-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1409 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 1996-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.19395878Sfc1 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
1409 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
988 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
354 m²/s²
Significant tornado parameter
1.8
Supercell composite
12.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 180549
SVRMSP
MNC023-151-180630-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1247 AM CDT THU JUL 18 1996

* SEVERE THUNDERSTORM WARNING FOR
  CHIPPEWA COUNTY - WEST CENTRAL MINNESOTA
  SWIFT COUNTY - WEST CENTRAL MINNESOTA

* UNTIL 130 AM CDT
 
* SOME LOCATIONS AFFECTED
    BENSON
    MONTEVIDEO
    MURDOCK

* AT 1250 AM CDT DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM
  MOVING nEAST AT 40 MPH.

GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! A TORNADO
WATCH IS IN EFFECT.  SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES.

HOWIESON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 10:07 PM CDTSevere Thunderstorm WarningMPXStevens53 min
Jul 17, 10:27 PM CDTSevere Thunderstorm WarningMPXLac qui Parle, Swift63 min
Jul 17, 10:55 PM CDTSevere Thunderstorm WarningMPXStevens50 min
Jul 17, 11:01 PM CDTTornado WarningMPXStevens, Swift34 min
Jul 17, 11:20 PM CDTTornado WarningMPXSwift40 min
Jul 17, 11:24 PM CDTSevere Thunderstorm WarningMPXPope66 min
Jul 17, 11:43 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi62 min
Jul 17, 11:57 PM CDTTornado WarningMPXChippewa, Swift33 min
Jul 18, 12:18 AM CDTSevere Thunderstorm WarningMPXStearns42 min
Jul 18, 12:31 AM CDTTornado WarningMPXKandiyohi, Stearns49 min
Jul 18, 12:41 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker, Stearns49 min
Jul 18, 12:49 AM CDTTornado WarningMPXStearns41 min
Jul 18, 12:57 AM CDTSevere Thunderstorm WarningMPXBenton, Sherburne, Wright63 min
Jul 18, 1:43 AM CDTSevere Thunderstorm WarningMPXChippewa, Renville47 min
Jul 18, 3:43 AM CDTSevere Thunderstorm WarningMPXAnoka, Ramsey47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1996Every severe thunderstorm warning in 1996

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.