Alert archive / Iowa / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 135, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 3, 2006, 4:33 AM CDT for Madison County, Iowa. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 3, 2006, 4:33 AM CDT (09:33 UTC)
- Expired
- May 3, 2006, 5:00 AM CDT
- In force
- 27 min
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
County Madison County, IA
The radar
The Des Moines radar (KDMX), 51 km from the middle of the area, began a volume at 09:32 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.
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 9.6 hours before the alert went out and 294 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.
- Mixed-layer CAPE
- 906 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 1700 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 263 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 May 3, 3:12 AM CDT, 1 hour 21 minutes earlier.
Area forecast discussion, May 3, 3:12 AM CDT, 1 hour 21 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 312 AM CDT WED MAY 3 2006 .DISCUSSION... SYNOPSIS... BROAD AREA OF DIFFLUENT FLOW ALOFT OVER UPPER MIDWEST...AHEAD OF 80KT JET STREAK NOW MOVING INTO NRN PLAINS. SIMILAR DIFFLUENT PATTERN OBSERVED FROM 700 TO 500 MB WITH CLOSED CYCLONIC CIRCULATION FROM SFC TO 500 MB OVER SRN CANADIAN PRAIRIE PROVINCES. 850 TROF/COL POINT INDICATED OVER MO RIVER VALLEY WITH PRONOUNCED THERMAL RIDGING FROM SOUTHERN PLAINS THROUGH SOUTHERN MINNESOTA AT 00 UTC. ONGOING QLCS ALONG FRONT THROUGH SE NEBRASKA AT 07Z NOW REACHING SW IA AT 03Z...WHILE WARM SECTOR DICSREET CELLS OVER NW MO BECOMING MORE NUMEROUS WITH TIME AS THEY MOVE TOWARD SOUTHCENTRAL IOWA ALONG THE NOSE OF THE 925 MB JET. DECENT INSTABILITY AXIS AHEAD OF APROACHING QLCS IN SW IOWA AND MIGHT SEE A COUPLE OF STRONGER UPDRAFTS PUSH SEVERE LIMITS EARLY THIS AM. .SHORT TERM...TODAY THROUGH THURSDAY NAM/GFS IN GOOD AGREEMENT ON MAIN FEATURES FROM TONIGHT THROUGH THURSDAY AFTERNOON WHICH DEPICTS UPPER LOW CONTINUING EAST THROUGH SOUTHERN TO SOUTHEAST CANADA AND DIFFLUENT FLOW BECOMING QUICKLY CONFLUENT AND ZONAL TODAY. THE LOW WILL FORCE SFC BAROCLINIC ZONE TO SOUTH AND EAST OF STATE WHICH WILL KEEP PRECIPITATION EVENT FROM THE OHIO VALLEY SOUTH THROUGH THE SOUTHERN PLAINS THROUGH THE WEEKEND. HOWEVER IN THE MEANTIME DECENT PCPN CHCS WILL BE FOUND THROUGH SOUTHEAST CWA THIS MORNING...AS COLD FRONT PASSES THE AREA THIS AFTERNOON WITH BROAD BUT RELATIVELY WEAK QG FORCING AND THETA-E CONVERGENCE RAPIDLY DIMINISHING. SFC FRONT HAS MADE IT TO THE EDGE OF THE FORECAST AREA AND WILL REACH EAST...PERHAPS A DECORAH TO LAMONI LINE BY BEFORE 12Z. RUC MODEL MUCAPES INCREASE ACROSS SOUTHERN TIERS OF COUNTIES BY 18Z TO AROUND 1800-2000 J/KG RIGHT ALONG THE LEADING EDGE OF THE COLD FRONT. WILL BE CLOSE CALL FOR SEVERE LATE MORNING FAR SE GIVEN THIS...BUT MAY WELL ESCAPE GIVEN BEST SFC-850 CONVERGENCE WILL BE ACROSS NORTHEAST MISSOURI. CURRENT PCPN CHCS LOOK GOOD WITH 50 POPS IN SE HALF THROUGH 18Z...DIMINISHING IN AREAL COVERAGE TO FAR SE FOR AFTERNOON HOURS. PROBLEM FOR TONIGHT APPEARS TO BE GFS WITH POSSIBLE GRID-SCALE FEEDBACK PROBLEM GIVEN A SIGNIFICANT PCPN BULLSEYE OVER NW MO AND INTO SRN IA. NAM HAS CLEARED THE CWA OF PCPN BY THIS POINT AND WILL REMOVE PCPN OVER SOUTHERN IOWA ALTOGETHER FOR TONIGHT. THURSDAY WILL PRESENT A CONTINUATION OF DEEP LAYER COOL AND DRY ADVECTION WITH GENERAL LACK OF ANY FORCING. MOS TEMPS ARE VERY SIMILAR SO WILL STICK WITH AN ONLY SIGHTLY COOLER METMOS GIVEN DECENT POTENTIAL FOR WIDESPREAD BKN SKY COVER OVER THE AREA WITH CU RULES FROM GFS IN THE -4 TO -5 RANGE. .LONG TERM...THURSDAY NIGHT THROUGH TUESDAY MADE A FEW WIND ADJUSTMENTS DIURNALLY FROM EARLY FRIDAY TO FRIDAY NIGHT AS HIGH PRESSURE IS JUST TO WEST WITH SLIGHT SFC GRADIENT OVER AREA. ALSO CURBED SKY COVER OVER NORTH DURING THIS PD. COOLEST TEMPERATURES OF THE FORECAST STILL ON TAP FOR EARLY SATURDAY MORNING. STRONG SFC HIGH BUILDS INTO AREA UNDER UPPER NW FLOW/NVA AND SUBSIDENCE WITH 1000-500 MB THICKNESS VALUES IN THE 540-548DAM RANGE. ALTHOUGH COOL...THESE TEMPS ARE STILL ONLY AROUND 5 DEGREES BELOW NORMAL LOWS FOR THIS POINT IN EARLY MAY. FOR DAYS 4-7...WEEKEND WILL BRING PATTERN CHANGE FORM GENERALLY DRY TO MORE CHANCES FOR RAIN AND THUNDER. GFS/ECMWF BOTH SHOWING TRANSITION TO A SYNOPTIC PVA PATTERN FOLLOWING EASTWARD SHIFT OF UPPER RIDGE BEGINNING MONDAY. THIS WILL BRING AN INCREASE IN CHANCES FOR SHOWERS AND THUNDERSTORMS THROUGH THE MID PART OF THE WORK WEEK AS CURRENT FORECAST INDICATES. NO SIGNIFICANT CHANGES TO PRECIPITATION FORECAST BUT A FEW MINOR ADJUSTMENTS TO TEMPERATURES MADE AND MAINTAINED POPS ON SUNDAY WITH SHORTWAVE ENERGY IN AREA PER GFS/ECMWF. && .DMX WATCHES/WARNINGS/ADVISORIES...NONE. && RUSSELL
Hazardous weather outlook, May 3, 3:57 AM CDT, 36 minutes before
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Local storm report, May 3, 3:33 AM CDT, 1 hour before
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 3:18 AM CDT | Severe Thunderstorm Warning | DMX | Taylor | 42 min |
| May 3, 5:08 AM CDT | Severe Thunderstorm Warning | DMX | Wayne | 52 min |
| May 3, 6:25 AM CDT | Severe Thunderstorm Warning | DMX | Davis | 28 min |
| May 3, 6:33 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose | 15 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2006Every severe thunderstorm warning in 2006
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; radar from the NEXRAD Level II archive.