A small cluster of thunderstorms developed ahead of a cold front as it moved southeast across the Missouri Valley. These storms produced very heavy rain.
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The episode as NWS PAH wrote it up.
A small cluster of thunderstorms developed ahead of a cold front as it moved southeast across the Missouri Valley. These storms produced very heavy rain.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Paducah, KY wrote its last area forecast discussion before the first event at Aug 12, 5:47 AM CST, 1 hour 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PADUCAH KY 647 AM CDT Mon Aug 12 2013 .MESOSCALE DISCUSSION... ISSUED AT 645 AM CDT MON AUG 12 2013 The majority of the convective activity this morning is occurring along the nose of a low level jet impinging on the decayed, stationary frontal boundary. The thunderstorms are tied slowly to an west to east oriented theta-e gradient stretching from Mayfield to Elkton Kentucky as of 6 am CDT. Although the low level jet should weaken after daybreak, enough upshear component will be available to maintain this convection over KY, mainly east of the Land Between the Lakes through 9 am to 10 am CDT time period. Given the speed of movement of the thunderstorms, any flooding issues should be brief this morning. Could be some training from New Madrid County eastward this morning...so would not be surprised if isolated reports of flooding are reported. && .UPDATE... ISSUED AT 645 AM CDT MON AUG 12 2013 Updated for 12z Aviation discussion and brief mesoscale discussion. && .SHORT TERM...(Today and Wednesday) ISSUED AT 349 AM CDT MON AUG 12 2013 The main focus for highest PoPs and Weather through tonight will be over West Kentucky and Southwest Indiana, as the effective surface boundary become oriented over this area. With periodic vorticity advection moves through the area, periodic shower and thunderstorm activity will be the rule. This frontal boundary should shift south of the WFO PAH forecast area by daybreak on Tuesday. Beyond that time, dry air advection begins in earnest as the mean ridge moves southward from the Great Lakes and upper midwest. Noticeable dewpoint drops should be in place by Wednesday, setting the stage for much cooler temperatures later in the week. The high resolution model guidance, as well as the short range guidance suite, still keeps the frontal passage consistent into Tuesday, with some minor .LONG TERM...(Wednesday Night through Sunday) ISSUED AT 349 AM CDT MON AUG 12 2013 The main feature of interest beginning this period will continue to be unseasonably strong high pressure that will stretch from the Great Lakes region east to the Mid Atlantic coast. Unseasonably cool and dry northeast flow will remain in place Thursday and Friday. However, a mid/upper level trof of low pressure will slowly develop and dig southeast into the mid MS River Valley Friday night...before becoming nearly stationary next weekend. Guidance has been consistent in showing an inverted surface trough forming in response to the mid lvl troffing. Moisture associated with these features will bring an increase in clouds...and also possibly spawn scattered showers east of the MS River next weekend. At this point, it looks like the atmosphere will be too stable to warrant a mention of thunder...and the increased cloud cover will delay any appreciable warming trend. && .AVIATION... ISSUED AT 645 AM CDT MON AUG 12 2013 MVFR ceilings will dominate the KPAH, KEVV, and KOWB TAF sites in the proximity of the decaying frontal boundary situated mainly along and south of the Ohio River. Timing of next convective bands will be somewhat problematic for the KEVV and KOWB taf sites this afternoon and tonight. For now, vicinity showers have added to these locations in anticipate of the approach of the next frontal boundary to the north. && .PAH WATCHES/WARNINGS/ADVISORIES... IL...NONE. MO...NONE. IN...NONE. KY...NONE. && MESOSCALE...Smith UPDATE...Smith SHORT TERM...Smith LONG TERM...GM AVIATION...Smith
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PADUCAH KY 438 AM CDT MON AUG 12 2013 ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087- 100-107>112-114-131000- JEFFERSON-WAYNE IL-EDWARDS-WABASH-PERRY IL-FRANKLIN-HAMILTON- WHITE-JACKSON-WILLIAMSON-SALINE-GALLATIN-UNION IL-JOHNSON-POPE- HARDIN-ALEXANDER-PULASKI-MASSAC-GIBSON-PIKE-POSEY-VANDERBURGH- WARRICK-SPENCER-FULTON-HICKMAN-CARLISLE-BALLARD-MCCRACKEN-GRAVES- LIVINGSTON-MARSHALL-CALLOWAY-CRITTENDEN-LYON-TRIGG-CALDWELL- UNION KY-WEBSTER-HOPKINS-CHRISTIAN-HENDERSON-DAVIESS-MCLEAN- MUHLENBERG-TODD-PERRY MO-BOLLINGER-CAPE GIRARDEAU-WAYNE MO-CARTER- RIPLEY-BUTLER-STODDARD-SCOTT-MISSISSIPPI-NEW MADRID- 438 AM CDT MON AUG 12 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHERN ILLINOIS...SOUTHWEST INDIANA...WESTERN KENTUCKY AND SOUTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE FORECAST TODAY. LOCALLY HEAVY RAIN, CAPABLE OF PRODUCING LOCALIZED FLOODING, WILL THE PRIMARY HAZARD AT THIS TIME. THE BEST CHANCE FOR STRONG STORMS WILL LIKELY RESIDE OVER SOUTHEAST MISSOURI INTO THIS AFTERNOON, WITH A FEW STORMS CAPABLE OF PRODUCING MARGINAL HAIL AND ISOLATED WIND GUSTS GREATER THAN 40 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A CHANCE OF THUNDERSTORMS IS FORECAST MAINLY ACROSS THE SOUTHERN HALF OF THE OUTLOOK AREA ON TUESDAY. A FEW STRONG STORMS MAY BE POSSIBLE OVER WEST KENTUCKY INTO THE AFTERNOON, WITH LOCALLY HEAVY RAIN, MARGINAL HAIL, AND ISOLATED WIND GUSTS GREATER THAN 40 MPH THE PRIMARY HAZARDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. HOWEVER, ANY REPORTS OF HEAVY RAIN AND FLOODING CONCERNS, AS WELL AS THE OCCURRENCE OF HAIL OR GUSTY WINDS IS APPRECIATED. SMITH
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
The county emergency management director reported 1.58 inches of rain in 90 minutes. Minor street flooding was reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2013Every state in 2013This day in weather historyWarnings in Illinois, August 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 472381.