Severe Thunderstorm Warning 135, NWS Des Moines, IA

Issued

Jul 10, 2002, 1:35 AM CDT (06:35 UTC)

Expired

Jul 10, 2002, 2:15 AM CDT

In force

40 min

Issued by

NWS Des Moines, IA

Area

Counties, with a storm outline in the text

County Sac County, IA

The Des Moines radar (KDMX), 142 km from the middle of the area, began a volume at 06:34 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.

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

131 
WUUS53 KDMX 100635
SVRDSM
IAC161-100715-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
134 AM CDT WED JUL 10 2002

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SAC COUNTY IN WEST CENTRAL IOWA

* UNTIL 215 AM CDT

* AT 128 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A     
  SEVERE THUNDERSTORM CENTERED 7 MILES NORTHEAST OF SCHALLER...OR    
  ABOUT 39 MILES SOUTH OF SPENCER...MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE CENTERED...

  NEAR NEMAHA AROUND 140 AM AND
  7 MILES NORTH OF SAC CITY AROUND 150 AM.

60 MPH WINDS WERE REPORTED IN STORM LAKE

VERY STRONG WINDS UP TO 60 MPH ARE LIKELY IN THE WARNED AREA.

MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. IF YOU LIVE IN A
MOBILE HOME...SEEK SHELTER IN A STURDY BUILDING.

LAT...LON 4256 9535 4226 9531 4223 9488 4255 9491

JAW

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 9, 9:59 PM CDT, 3 hours 36 minutes earlier.

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
959 PM CDT TUE JUL 9 2002

LTL CHG TO FCST OVNGT BESIDE RAISING MINS SLGTLY.  STLT IMAGERY
SHOWS UPR LVL LOW JUST GETTING READY TO DROP SEWD ACRS DAKOTAS.  02Z
SFC ANLYS PLACES LOW INVOF KHLC WITH INVERTED TROF INTO ERN SD.
RADAR MOSIAC INDCS MCS AHD OF LOW ACRS ERN DAKOTAS...AND 00Z ETA
BRINGS THIS MAINLY INTO MN OVNGT.  PRIMARY LOW LVL MSTR
TRANSPORT...H85/H7 THETA-E ADVCTN AND QG FORCING ALL FOCUS N OF IA
WITH H85/H3 MEAN WND SUGGESTING MOVMT MAINLY EWD THRU 12Z.  CURRENT
FCST HAS CHC POPS CNTRL AND NWRN PTNS WITH HIGHEST NW.  CANNOT ARGUE
WITH THIS SCENARIO AS SIOUXLAND MCS MAY CROSS INTO FA OVNGT IN LN
WITH ETA QPF.

TEMPS RUNNING AHD OF FCST MIN TRENDS SO RAISED SVRL DEGREES.  OTHER
MINOR CHGS TO SKY COVER AND WNDS TO FIT CURRENT WX.

BEST HVY PCPN THREAT FOR FA WL BE TMRW.  ETA DEPICTS SLOW MOVMT WITH
PWS AOA 1.75 INCHES IN DEEP QG FORCING...CLOSE TO SHARS EVENT.  24
HR QPF SCARY WITH AMTS 1 TO ALMOST 5 INCHES LCLLY.  WL ADD MENTION
OF HVY RAINS WED AND WED NGT S.  MID SHIFT MAY NEED FLOOD WATCH WITH
FULL MRNG PACKAGE.

.DSM...NONE

SMALL

Severe Thunderstorm Warnings in Iowa, 2002Every severe thunderstorm warning in 2002

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; radar from the NEXRAD Level II archive.