Alert archive / Minnesota / Severe Thunderstorm Warnings in 1988

Severe Thunderstorm Warning 26, NWS Twin Cities, MN

July 7, 1988Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 7, 1988, 5:10 PM CDT for Yellow Medicine County, Minnesota. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 7, 1988, 5:10 PM CDT (22:10 UTC)
Expired
Jul 7, 1988, 6:10 PM CDT
In force
60 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Yellow Medicine County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 10.2 hours before the alert went out and 180 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 1988-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 565 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 1988-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 162 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
565 J/kg
Mixed-layer CIN
-158 J/kg
Mixed-layer LCL
1522 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
162 m²/s²
0-3 km storm-relative helicity
148 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.

000 
TTAA00 KSTC 072210
SVRSTC
MNC173-072310-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MN
510PM CDT THU JUL 7 1988

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 610PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF
CENTRAL MINNESOTA:
                  COUNTY
                  YELLOW MEDICINE
INCLUDING THE CITIES OF
 ST. LEO AND CLARKFIELD


AT 510PM CDT THE YELLOW MEDICINE COUNTY SHERIFFS DEPARTMENT REPORTED
A SEVERE THUNDERSTORM IN THE VICINITY OF CANBY MINNESOTA...55 MILES
NORTHWEST OF REDWOOD FALLS. THIS DANGEROUS STORM WAS PRODUCING HAIL 1
INCH IN DIAMETER AS IT MOVED EAST AT 35 MPH.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DEADLY ARE
ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY AWAY FROM WINDOWS UNTIL
THE STORM HAS PASSED.


WDV/JF

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.

In the hours before

Special weather statement, Jul 7, 3:53 PM CDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
345 PM CDT THU JUL 7 1988

..THUNDERSTORMS DEVELOPING ACROSS CENTRAL AND EAST CENTRAL MINNESOTA
  AS WELL AS NORTHWEST WISCONSIN..

AT 340 PM CDT...THUNDERSTORMS..SOME OF THEM STRONG..WERE DEVELOPING
RAPIDLY ACROSS PARTS OF EASTERN MINNESOTA AND NORTHWEST WISCONSIN.

THE STRONGEST THUNDERSTORMS WERE OCCURRING OVER SOUTHWEST PARTS OF
THE TWIN CITIES METROPOLITAN AREA NEAR BELLE PLAINE..NEW PRAGUE AND
CHASKA.

THESE STORMS WERE MOVING NORTHESST AT 15 MILES AN HOUR AND WILL BE
AFFECTING MUCH OF THE TWIN CITIES METRO AREA INCLUDING LAKE MINNETONKA
THROUGH AT LEAST 500 PM. PERSONS ENGAGED IN OUTDOOR ACTIVITIES AND
BOATING SHOULD MAKE PREPARATIONS FOR SOME ADVERSE WEATHER CONDITIONS.

ELSEWHERE..SHOWERS AND THUNDERSTORMS WERE DEVELOPING ALONG AND EAST
OF THE ST CROIX RIVER FROM NEAR STILLWATER OF THE EASTERN METRO TO
OSCEOLA AND BALSAM LAKE OF POLK COUNTY WISCONSIN.

MOVEMENT WAS TO THE NORTHEAST AT 15 MILES AN HOUR.

NO SEVERE WEATHER HAS BEEN REPORTED WITH THIS ACTIVITY AS OF 345 PM
BUT DUE TO THE RAPID DEVELOPMENT THESE STRONG THUNDERSTORMS WILL
BEAR WATCHING THROUGH THE AFTERNOON AND EVENING HOURS.
SWANBERG
Special weather statement, Jul 7, 4:05 PM CDT, 1 hour 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
405 PM CDT THU JUL 7 1988

...SEVERE THUNDERSTORM WATCH FOR CENTRAL MINNESOTA UNTIL 10 PM...

AT 4 PM THIS AFTERNOON THUNDERSTORMS HAD DEVELOPED IN CENTRAL
MINNESOTA IN MORRISON AND MILLE LACS COUNTIES AND OVER MILLE LACS
LAKE.

ALTHOUGH NO SEVERE WEATHER HAS BE REPORTED THESE THUNDERSTORMS ARE
CAPABLE OF PRODUCING SMALL HAIL...BRIEF HEAVY RAIN...NUMEROUS   (
LIGHTNING STRIKES AND VERY GUSTY WINDS.

PERSONS SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY IF SEVERE
WEATHER DEVELOPS.

FRASER
Special weather statement, Jul 7, 4:52 PM CDT, 18 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
445 PM CDT THU JUL 7 1988

..SEVERE THUNDERSTORM WATCH IN EFFECT FOR MUCH OF CENTRAL AND
  NORTHEAST MINNESOTA AS WELL AS NORTHWEST WISCONSIN UNTIL 10 PM..

THUNDERSTORMS..SOME OF THEM STRONG..CONTINUED TO EXPAND IN COVERAGE
ACROSS WIDELY SCATTERED PARTS OF SOUTHERN AND CENTRAL MINNESOTA INTO
NORTHWEST WISCONSIN.

AT 435 PM..STRONGEST THUNDERSTORMS WERE LOCATED ALONG THE SOUTH DAKOTA
/MINNESOTA BORDER FROM NEAR CANBY TO GRANITE FALLS..OVER CENTRAL
MINNESOTA TO THE WEST OF HUTCHINSON NEAR COSMOS AND ALSO ACROSS
SCATTERED PARTS OF THE TWIN CITIES METRO AREA.

OTHER STRONG THUNDERSTORMS HAD FORMED A LINE ACROSS EXTREME EASTERN
MINNESOTA INTO NORTHWEST WISCONSIN FROM NEAR HASTINGS AND TAYLOR FALLS
OF THE EASTERN METRO AREA THROUGH ST CROIX FALLS AND BALSAM LAKE OF
NORTHWEST WISCONSIN.
FREQUENT LIGHTNING STRIKES..STRONG GUSTY WINDS AND BRIEF HEAVY RAINS
ARE LIKELY AS THESE STORMS MOVE TO THE NORTHEAST AT 25 MILES AN HOUR.

YOU SHOULD KEEP ABREAST OF THIS WEATHER SITUATION IN CASE SEVERE
THUNDERSTORM WARNINGS ARE ISSUED FOR YOUR AREA. THE ATMOSPHERE REMAINS
VERY UNSTABLE SO THE POTENThIAL IS THERE FOR SEVERE WEATHER ACROSS
MINNESOTA AND WESTERN WISCONSIN THIS AFTERNOON AND TONIGHT.
SWANBERG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 4:42 PM CDTTornado WarningMPXYellow Medicine28 min
Jul 7, 6:21 PM CDTTornado WarningMPXStearns24 min
Jul 7, 6:40 PM CDTTornado WarningMPXStearns35 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1988Every severe thunderstorm warning in 1988

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.