Alert archive / Minnesota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 9, NWS Twin Cities, MN

May 16, 1999Le Sueur County, Rice County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 16, 1999, 5:45 PM CDT for Le Sueur County, Rice County, Minnesota. It was in force for 30 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
May 16, 1999, 5:45 PM CDT (22:45 UTC)
Expired
May 16, 1999, 6:15 PM CDT
In force
30 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Le Sueur County, MN, Rice County, MN

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 16, 5:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.8 hours before the alert went out and 55 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 12:00Z on 1999-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 12:00Z on 1999-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
597 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
142 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

999 
WUUS1 KMSP 162240
SVRMSP
MNC079-131-162315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
545 PM CDT SUN MAY 16 1999

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA
  RICE COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 615 PM CDT

* AT 540 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL 4 MILES SOUTH OF MONTGOMERY...
  OR ABOUT 17 MILES WEST OF FARIBAULT...MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  MONTGOMERY
  LONSDALE
  KILKENNY
  HEIDELBERG
  WEBSTER

THIS WARNING IS AN EXTENSION OF THE PREVIOUS WARNING FOR LE SUEUR 
COUNTY. THIS IS A DANGEROUS STORM WITH LARGE HAIL...STAY INDOORS 
AWAY FROM WINDOWS.

MBK

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 4:06 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Watonwan34 min
May 16, 5:05 PM CDTSevere Thunderstorm WarningMPXLe Sueur40 min
May 16, 5:14 PM CDTSevere Thunderstorm WarningMPXMartin46 min
May 16, 5:41 PM CDTSevere Thunderstorm WarningMPXWatonwan49 min
May 16, 6:26 PM CDTSevere Thunderstorm WarningMPXFaribault49 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1999Every 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; the sounding from the Mesonet's radiosonde archive.