Alert archive / Iowa / Mesoscale Discussions in 2003
Mesoscale Discussion 1849
The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2003, 11:05 PM CDT for 28 counties in Iowa; Fillmore County, Houston County, Winona County, Minnesota; 5 counties in Wisconsin. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Jul 14, 2003, 11:05 PM CDT (04:05 UTC)
- Expired
- Jul 15, 2003, 12:00 AM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 36 counties
Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hardin County, IA, Howard County, IA, Jasper County, IA, Linn County, IA, Marshall County, IA, Mitchell County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Winneshiek County, IA, Wright County, IA, Fillmore County, MN, Houston County, MN, Winona County, MN, Crawford County, WI, Grant County, WI, La Crosse County, WI, Richland County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 149 km from the middle of the area, began a volume at 04:07 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
Davenport, (KDVN), launched 00:00Z, 4.1 hours before the alert went out and 206 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2108 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 150406 SWOMCD SPC MCD 150405 WIZ000-ILZ000-IAZ000-MNZ000-150500- MESOSCALE DISCUSSION 1849 NWS STORM PREDICTION CENTER NORMAN OK 1105 PM CDT MON JUL 14 2003 AREAS AFFECTED...CNTRL/ERN IA...SE MN...WRN WI CONCERNING...TORNADO WATCH 748... VALID 150405Z - 150500Z NEW WW IS NOT CURRENTLY ANTICIPATED. INTENSE CONVECTION REMAINS ORIENTED IN BAND ALONG SOUTHWESTERLY LOW-LEVEL JET AXIS...AHEAD OF SURFACE TROUGH...WHICH WILL CONTINUE TO PROGRESS SLOWLY EASTWARD ACROSS EASTERN MINNESOTA/CENTRAL WISCONSIN THROUGH 06Z. COOLER/DRIER LOW-LEVEL ENVIRONMENT ACROSS NORTHEAST IOWA AND CENTRAL/EASTERN WISCONSIN IS NOT EXPECTED TO DESTABILIZE SUFFICIENTLY TO SUPPORT ADDITIONAL SEVERE THREAT OVERNIGHT. INFLOW OF VERY MOIST LOW-LEVEL AIR MASS WITH MID 70S SURFACE DEW POINTS MAY MAINTAIN STRONG/ISOLATED SEVERE STORMS ANOTHER HOUR OR TWO...MOSTLY NORTH/EAST OF DES MOINES INTO AREAS NORTHWEST OF DUBUQUE. HOWEVER...VAD WIND DATA FROM DES MOINES ALREADY SUGGEST LOW-LEVEL JET IN THE 1 TO 2 KM AGL LAYER IS BEGINNING TO WEAKEN...AND AS THIS TREND CONTINUES AFTER 06Z...FORCING FOR VIGOROUS CONVECTIVE DEVELOPMENT IS EXPECTED TO DIMINISH. ..KERR.. 07/15/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MKX...DVN...ARX...DMX... 42469408 43099332 43879248 44349161 44209080 43369027 42569051 42189134 41639263 41729358 41979423
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 7:16 PM CDT | Mesoscale Discussion | SPC | Allamakee, Chickasaw, Clayton, Fayette, Howard, Mitchell and 1 more | 119 min |
| Jul 14, 7:40 PM CDT | Tornado Watch | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Fayette and 12 more | 4 hr |
| Jul 14, 9:24 PM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Calhoun, Carroll, Crawford, Dallas and 7 more | 36 min |
| Jul 15, 2:40 AM CDT | Mesoscale Discussion | SPC | Clinton, Davis, Des Moines, Henry, Jefferson, Lee and 6 more | 3 hr |
| Jul 14, 7:42 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Le Sueur, Nicollet, Rice, Steele, Waseca | 93 min |
Nearby
Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Wisconsin, 2003Mesoscale Discussions in Minnesota, 2003Every mesoscale discussion in 2003
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.