Quantitative Precipitation Forecast
Issued by NWS

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FOUS30 KWBC 210648
QPFERD

EXCESSIVE RAINFALL DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
247 AM EDT TUE APR 21 2015

...VALID 06Z TUE APR 21 2015 - 12Z WED APR 22 2015...
...REFERENCE AWIPS GRAPHIC UNDER...DAY 1 EXCESSIVE RAINFALL...


...ME...

SOME GRADUAL PROGRESSION TO THE UPSTREAM H5 TROF OVER THE WESTERN
GREAT LAKES..PRECEDED BY A GRADUAL VEERING OF WINDS ALOFT AND BY
LATER THIS AFTERNOON A FRONTAL PASSAGE..SHOULD BRING TO AN END THE
MODERATE TO LOCALLY HEAVY RAIN OVER ME.  BUT FOR AT LEAST THE
REMAINDER OF THE MORNING HOURS INTO MID AFTERNOON OR SO..A STILL
MODERATELY STRONG AND ONLY SLOWLY PROGRESSIVE LOW LEVEL ATLANTIC
INFLOW REGIME WILL KEEP THINGS WET FOR MUCH OF ME..AND ESPECIALLY
NEAR THE COAST.  40-50+KTS OF SOUTHERLY H85 INFLOW BRINGING IN PWS
IN EXCESS OF 1 INCH..ALONG WITH A RATHER SLOW PROGRESSION TO THE
PATTERN..WILL SUPPORT THE MODERATE TO LOCALLY HEAVY RAINS.  THE 2
INCHES OF RAIN AT PWM IN THE LAST 6 HOURS ENDING AT 06Z WILL
PROBABLY BE A HEAVY OUTLIER IN THIS PATTERN..BUT SOME ADDITIONAL
1-2 INCH TOTALS BETWEEN NOW AND EARLY AFTERNOON COULD POSE SOME
LOCAL RUNOFF PROBLEMS.

TERRY
$$





USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.