Alert archive / Minnesota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 114, NWS Twin Cities, MN

July 3, 1999Kandiyohi County, Renville County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 3, 1999, 3:20 AM CDT for Kandiyohi County, Renville County, Minnesota. It was in force for 60 min. 2 reports 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 3, 1999, 3:20 AM CDT (08:20 UTC)
Expired: Jul 3, 1999, 4:20 AM CDT
In force: 60 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Kandiyohi County, MN, Renville County, MN

The radar

The Minneapolis radar (KMPX), 112 km from the middle of the area, began a volume at 08:23 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 3, 3:40 AM CDT	Thunderstorm Wind 50	Fairfax, MN	Numerous 6 inch diameter branches down. Winds estimated.
Jul 3, 3:52 AM CDT	Thunderstorm Wind 55	New London, MN	Power lines down. Winds estimated.

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 3, 2:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.3 hours before the alert went out and 109 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: 1357 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 226 m²/s²
0-3 km storm-relative helicity: 482 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 030821
SVRMSP
MNC067-129-030920-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
320 AM CDT SAT JUL 3 1999

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

* SEVERE THUNDERSTORM WARNING FOR...
  KANDIYOHI COUNTY IN CENTRAL MINNESOTA
  RENVILLE COUNTY IN CENTRAL MINNESOTA

* UNTIL 420 AM CDT

* AT 320 AM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH
  DAMAGING WINDS JUST WEST OF A LINE FROM WILMAR TO FAIRFAX.  THE
  STORM WAS MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS AFFECTED
  WILMAR
  OLIVIA
  RENVILLE
  FAIRFAX
  NEW LONDON
  SUNBURG
  SACRED HEART

THIS IS A DANGEROUS STORM...WITH DAM@AGING WINDS.  STAY INDOORS
AWAY FROM WINDOWS.



AZ

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 2, 9:30 PM CDT, 5 hours 50 minutes earlier.

Area forecast discussion, Jul 2, 9:30 PM CDT, 5 hours 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
930 PM CDT FRI JUL 2 1999

HAVE UPDATED FORECAST TO SCALE BACK CONVECTION.  IT APPEARS MOST LOW
LEVEL INSTABILITY SOUTHWEST OF FORECAST AREA.  ELEVATED CONVECTION
SD SHOULD TRACK INTO MN LATER TONIGHT.  LATEST RUC MODEL INDICATES
850MB INSTABILITY/MOISTURE CONVERGENCE.  HAIL STILL POSSIBLE
ALTHOUGH WET BULB ZERO QUITE HIGH.  VERY WARM 700 MB TEMPERATURES
MAY SUPPRESS CONVECTION FAR SOUTHWEST...BUT DIFLUENT 850MB-500MB
THICKNESS FIELD WOULD INDICATED CONTINUED HEAVY RAIN POTENTIAL.

.MSP...NONE.
 SCOTT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 2:39 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	46 min
Jul 3, 2:56 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Swift	59 min
Jul 3, 3:14 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	61 min
Jul 3, 3:37 AM CDT	Severe Thunderstorm Warning	MPX	Watonwan	48 min
Jul 3, 3:58 AM CDT	Severe Thunderstorm Warning	MPX	McLeod, Meeker	62 min
Jul 3, 3:58 AM CDT	Severe Thunderstorm Warning	MPX	Nicollet, Sibley	62 min
Jul 3, 4:22 AM CDT	Severe Thunderstorm Warning	MPX	Sherburne, Stearns, Wright	48 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1999 Every severe thunderstorm warning in 1999

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.