Alert archive / Iowa / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 76, NWS Des Moines, IA

June 8, 1999Wright County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 8, 1999, 6:28 PM CDT for Wright County, Iowa. It was in force for 32 min. 1 report 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: Jun 8, 1999, 6:28 PM CDT (23:28 UTC)
Expired: Jun 8, 1999, 7:00 PM CDT
In force: 32 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Wright County, IA

What was reported inside it

Time	Report	Where	Remark
Jun 8, 6:35 PM CDT	Hail 0.75	Goldfield, 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
Jun 8, 1:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 236 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: 1727 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -160 m²/s²
0-3 km storm-relative helicity: -132 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 8, 2:45 PM CDT, 3 hours 43 minutes earlier.

Area forecast discussion, Jun 8, 2:45 PM CDT, 3 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
245 PM CDT TUE JUN 8 1999

LITTLE VORT MAX LIFTING NORTHEAST AND OUTFLOW BOUNDARY DROPPING
SOUTHWEST INTO VERY UNSTABLE AIRMASS OVER STATE. WILL CONTINUE WITH
SCATTERED STORMS WORDING CENTRAL AND NORTH TONIGHT...MAINLY FOR THE
EVENING. WITH BOUNDARIES FLOATING AROUND AND SUCH AN UNSTABLE AIRMASS
WE WILL PROBABLY SEE THINGS FESTER THROUGH THE EVENING. WILL TREND
THINGS TO THE DRIER SIDE AFTER MIDNIGHT. NOT A LOT OF MID LEVEL
FORCING WEDNESDAY BUT ATMOSPHERE REMAINS UNSTABLE...BUT NOT AS MUCH
AS TODAY. HAD A DRY FORECAST GOING AND AM CONSIDERING ADDING A LOW
CHANCE POP. WILL HAVE TO SEE HOW CONVECTION DEVELOPS OVER THE
NORTHERN PLAINS TONIGHT AS IT PROPAGATES EAST...MOST OF THIS SHOULD
REMAIN TO OUR NORTH HOWEVER. BY WEDNESDAY NIGHT FRONT BEGINS TO MOVE
EAST AND WILL BE LOCATED ACROSS THE STATE THURSDAY. ALL PARAMETERS
POINTS TO A FAIRLY DESCENT CHANCE OF CONVECTION WEDS NIGHT AND
THURSDAY. ALSO HEAVY RAIN POTENTIAL WILL BE MENTIONED IN THE ZONES
THURSDAY. FWC TEMPS LOOK OK.

.DSM...NONE

JAW

In the hours before

Local storm report, Jun 8, 1:48 PM CDT, 4 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
148 PM CDT TUE JUN 08 1999

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

0145 PM    3 NW SWEA CITY            IA    .75 INCH HAIL
06/08/99   KOSSUTH

Local storm report, Jun 8, 2:26 PM CDT, 4 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
226 PM CDT TUE JUN 08 1999

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

0215 PM    FINCHFORD                 IA    1 INCH HAIL
06/08/99   BLACKHAWK

Local storm report, Jun 8, 3:23 PM CDT, 3 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
323 PM CDT TUE JUN 08 1999

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

0317r PM    5 W LAKE MILLS            IA    .75 INCH HAIL
06/08/99   WINNEBAGO                       FROM NWS SPOTTER

SMALL

Local storm report, Jun 8, 3:35 PM CDT, 2 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
335 PM CDT TUE JUN 08 1999

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

0229z PM    3 SW WAVERLY              IA    .88 INCH HAIL
06/08/99   BREMER

Special weather statement, Jun 8, 3:51 PM CDT, 2 hours 37 minutes before

IAZ004>007-015>017-023>028-033>039-045>050-058>062-071>075-081>086-
092>097-090000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
351 PM CDT TUE JUN 8 1999

A LARGE PORTION OF SEVERE THUNDERSTORM WATCH NUMBER 422 HAS BEEN
CANCELLED.  THE CANCELLATION AREA INCLUDES THAT AREA OF CENTRAL AND
SOUTH CENTRAL IOWA ALONG AND SOUTH OF HIGHWAY 30...OR ALONG AND
SOUTH OF CARROLL...AMES...MARSHALLTOWN AND TAMA.  DES MOINES...
CRESTON...LAMONI AND OTTUMWA ARE OTHER TOWNS CLEARED FROM THIS
WATCH.

THE REMAINDER OF THE WATCH REMAINS IN EFFECT FOR NORTH CENTRAL AND
NORTHEAST IOWA UNTIL 7 PM.  SEVERAL THUNDERSTORMS CONTINUE IN THIS
AREA OF THE STATE...WITH THE PRIMARY HAZARDS BEING HAIL UP TO 1
INCH AND HEAVY DOWNPOURS.

KULA

Local storm report, Jun 8, 3:58 PM CDT, 2 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
358 PM CDT TUE JUN 08 1999

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

0230 PM    LAKOTA                    IA    .75 INCH HAIL
06/08/99   KOSSUTH                         DIME SIZE HAIL AND VERY
                                           HEAVY RAIN...FROM NWS
                                           SPOTTER

SMALL

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 8, 2:27 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	33 min
Jun 8, 2:29 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago	51 min
Jun 8, 6:04 PM CDT	Tornado Warning	DMX	Wright	31 min

Nearby

Severe Thunderstorm Warnings in Iowa, 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.