Alert archive / Iowa / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 61, NWS La Crosse, WI

June 1, 2000Howard County, Mitchell County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 1, 2000, 12:02 AM CDT for Howard County, Mitchell County, Iowa. It was in force for 58 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Jun 1, 2000, 12:02 AM CDT (05:02 UTC)
Expired: Jun 1, 2000, 1:00 AM CDT
In force: 58 min
Issued by: NWS La Crosse, WI
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Howard County, IA, Mitchell County, IA

What was reported inside it

Time	Report	Where	Remark
Jun 1, 12:15 AM CDT	Hail 0.75	Mc Intire, IA
Jun 1, 12:28 AM CDT	Hail 0.75	Lime Spgs, IA

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
May 31, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.0 hours before the alert went out and 179 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: 1826 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KARX 010505
SVRLSE
IAC089-131-010600-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1202 AM CDT THU JUN 1 2000

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HOWARD COUNTY IN NORTHEAST IOWA
  MITCHELL COUNTY IN NORTH CENTRAL IOWA

* UNTIL 100 AM CDT

* AT 1202 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING LARGE HAIL OVER MEYER...OR ABOUT 14
  MILES NORTHEAST OF OSAGE. THIS ACTIVITY WAS MOVING SOUTHEAST AT 25 MPH.
  ANOTHER SEVERE THUNDERSTORM NEAR ALBERT LEA WAS ALSO MOVING SOUTHEAST
  TOWARDS THE AREA.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR BAILEY AT 1210 AM CDT
  NEAR MCINTIRE AT 1215 AM CDT
  NEAR SARATOGA AND CHESTER BY 1230 AM CDT

LARGE DESTRUCTIVE HAIL IS THE MAIN THREAT WITH THESE STORMS. FOR YOUR
PROTECTION...SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM
WINDOWS.

NELSON

LAT...LON 4350 9302 4327 9291 4322 9210 4350 9207

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 La Crosse, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at May 31, 3:20 PM CDT, 8 hours 42 minutes earlier.

Area forecast discussion, May 31, 3:20 PM CDT, 8 hours 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
320 PM CDT WED MAY 31 2000

...FORECAST PROBLEMS HINGE ON PLACEMENT OF WARM FRONT NEXT 24 HOURS.
POTENTIAL FOR HEAVY RAINFALL TONIGHT AND THURSDAY MORNING AND THE
POSSIBILITY OF SEVERE WEATHER...

18Z SURFACE ANALYSIS SHOWS WARM FRONT EXTENDING FROM SOUTHEAST
NEBRASKA...THROUGH CENTRAL IOWA AND ON INTO NORTHERN ILLINOIS.
ANOTHER BOUNDARY NOTED ACROSS EXTREME NORTHERN IOWA. CONVECTION
REDEVELOPING ALONG AND TO THE NORTH OF THE WARM FRONT.

12Z MODELS IN GOOD AGREEMENT THROUGH 36 HOURS WITH THE AVN THEN
BECOMING FASTER WITH REGARDS TO THE MIDWEST WAVE. PREFER THE FASTER
AVN SOLUTION FOR THE OUTER PERIODS.

BACK BUILDING CONVECTION SHOULD CONTINUE TO THE NORTH OF THE FRONT
THROUGH THE EVENING HOURS. FAVORABLE LAPSE RATES AND SHEAR PROFILES
SHOULD HELP CONVECTION TO REMAIN ORGANIZED THROUGH THE EVENING WITH
THE MAIN THREAT BEING FROM LARGE HAIL.

LOW LEVEL JET DEVELOPS TONIGHT ACROSS THE PLAINS AND SHIFTS EASTWARD
INTO IOWA/SOUTHERN MINNESOTA BY MORNING. MODELS PROG WARM FRONT TO
LIFT SLOWLY NORTHWARD OVERNIGHT. NOSE OF LOW LEVEL JET INTO SOUTHEAST
MINNESOTA SHOULD ENHANCE UPWARD MOTION. PRECIPITABLE WATER VALUES
QUITE HIGH (APPROACHING 2 INCHES NEAR BOUNDARY) WILL RESULT IN
LOCALLY HEAVY RAINS. WITH PREVIOUS HEAVY RAINS OVER NORTHEAST IOWA
WILL ISSUE FLASH FLOOD WATCH FOR THIS AREA. SINCE SOUTHEAST MINNESOTA
HAS AVOIDED MUCH OF THE HEAVIER RAIN...WILL HOLD OFF ON ANY WATCH AT
THIS TIME AND ISSUE FLOOD POTENTIAL OUTLOOK.

ON THURSDAY...WARM FRONT CONTINUES TO SHIFT NORTHWARD. SOME
UNCERTAINTY AS TO POSITION...THUS WILL CONTINUE WITH RATHER HIGH POPS
ACROSS THE AREA. IT LOOKS AS THOUGH MUCH OF THE SOUTHERN ZONES WILL
BE IN THE WARM SECTOR. CONVECTIVE PARAMETERS INDICATE ANOTHER ROUND
OF SEVERE WEATHER POSSIBLE BY AFTERNOON. AS LOW PULLS NORTHEASTWARD
ALONG FRONT SHOULD FINALLY SEE BOUNDARY EXIT THE AREA THURSDAY NIGHT
AND FRIDAY WITH DRY WEATHER SETTLING IN FOR THE WEEKEND.

COORDINATION WITH KMKX...KMPX...KDMX...KDVN. THANKS.

.LSE...FLASH FLOOD WATCH TONIGHT NORTHEAST IOWA. IAZ008>011...018...
019...029...030.

RABERDING

In the hours before

Local storm report, May 31, 9:53 PM CDT, 2 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
953 PM CDT WED MAY 31 2000

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION....

0929 PM    LYLE                           0.75 INCH HAIL
05/31/00   MOWER                          REPORTED BY DISPATCH

0930 PM    GRAND MEADOW                   0.75 INCH HAIL
06/31/00   MOWER                          REPORTED BY DISPATCH

NELSON

Local storm report, May 31, 10:54 PM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1054 PM CDT WED MAY 31 2000

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION....

1030 PM    POTOSI                    WI   0.75 INCH HAIL
05/31/00   GRANT                          REPORTED BY GENERAL PUBLIC

NELSON

Local storm report, May 31, 11:34 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1134 PM CDT WED MAY 31 2000

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION....

1105 PM    2 S VICTORY               WI   1.00 INCH HAIL
05/31/00   VERNON                         REPORTED BY GENERAL PUBLIC

NELSON

Local storm report, Jun 1, 12:02 AM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1202 AM CDT THU JUN 1 2000

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1140 PM    2 S VICTORY               WI   FLOODING
05/31/00   VERNON                         MUDSLIDES ALONG HIGHWAY 35.

1154 PM    READSTOWN                 WI   FLOODING
05/31/00   VERNON                         SEVERAL HOMES UNDER WATER.
                                          BANKS ALONG NEARBY CREEKS
                                          AND STREAMS CAVING IN.

1155 PM    ADAMS                     MN   .75 INCH HAIL
05/31/00   MOWER                          REPORTED BY FIRE DEPT.

SHEA

N

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 8:30 PM CDT	Severe Thunderstorm Warning	ARX	Clayton	45 min
May 31, 9:07 PM CDT	Severe Thunderstorm Warning	ARX	Mitchell	53 min
May 31, 10:00 PM CDT	Severe Thunderstorm Warning	ARX	Mitchell	60 min
May 31, 10:27 PM CDT	Flash Flood Warning	ARX	Mitchell	5 hr
May 31, 10:35 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	55 min
May 31, 10:49 PM CDT	Flash Flood Warning	ARX	Howard	4 hr
Jun 1, 12:14 AM CDT	Severe Thunderstorm Warning	ARX	Chickasaw	61 min
Jun 1, 12:22 AM CDT	Flash Flood Warning	ARX	Allamakee, Winneshiek	6 hr
Jun 1, 1:35 AM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Clayton	55 min
Jun 1, 6:02 AM CDT	Flash Flood Warning	ARX	Allamakee	4 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2000 Every severe thunderstorm warning in 2000

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.