Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 276, NWS Twin Cities, MN

July 14, 1998Ramsey County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 14, 1998, 10:20 PM CDT for Ramsey County, Washington 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 14, 1998, 10:20 PM CDT (03:20 UTC)
Expired: Jul 14, 1998, 11:20 PM CDT
In force: 60 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 49 km from the middle of the area, began a volume at 03:22 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 14, 10:25 PM CDT	Thunderstorm Wind 55	Vadnais Hgts, MN	Trees blown down. Estimated windspeed.
Jul 14, 10:50 PM CDT	Thunderstorm Wind 50	Afton, MN	Trees and power lines down. Estimated windspeed.

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 14, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.3 hours before the alert went out and 52 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: 2121 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1376 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 150320 RRA
SVRMSP
MNC019-037-123-139-163-150420-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1020 PM CDT TUE JUL 14 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA
  DAKOTA COUNTY IN EAST CENTRAL MINNESOTA
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA
  SCOTT COUNTY IN EAST CENTRAL MINNESOTA
  WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 1120 PM CDT

* AT 1015 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH
  DAMAGING WINDS FROM NEW GERMANY AND MOUND THROUGH MINNEAPOLIS TO
  FOREST LAKE.  THE STORMS WERE MOVING SOUTHEAST AT 25 MPH.

* SOME LOCATIONS AFFECTED
    VICTORY
    CHASKA
    SHAKOPEE
    ROSEMONT
    LAKE ELMO
    NEWPORT

THIS IS A DANGEROUS STORM...WITH DAMAGING WINDS.  STAY INDOORS
AWAY FROM WINDOWS.


TOGSTAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 7:05 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Stearns, Todd	60 min
Jul 14, 7:09 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	31 min
Jul 14, 7:39 PM CDT	Severe Thunderstorm Warning	MPX	Stevens	61 min
Jul 14, 8:05 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Swift	60 min
Jul 14, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle	61 min
Jul 14, 8:47 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	48 min
Jul 14, 9:26 PM CDT	Tornado Warning	MPX	Kandiyohi, Renville	34 min
Jul 14, 9:53 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	62 min
Jul 14, 10:01 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville, Yellow Medicine	64 min
Jul 14, 10:20 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Dakota, Scott	60 min
Jul 14, 10:54 PM CDT	Severe Thunderstorm Warning	MPX	Brown	61 min
Jul 15, 12:43 AM CDT	Severe Thunderstorm Warning	MPX	Freeborn	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1998 Every severe thunderstorm warning in 1998

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.